GB 4706 is a safety standard series for household and similar electrical appliances, and consists of the following parts:
Part 1: General Requirements;
Part 2: special requirement.
This part is the first part of GB 4706.
This part is identical to IEC 60335-1 "Household and similar electrical appliances - Safety - Part 1: General requirements" (Edition 4.1) (2004). In this part, the contents with corresponding national standard available references the national standards; the ones without corresponding national standard available reference IEC standards listed.
The arrangement order of Chapter 2 "normative references" in this part is different from the one of IEC 60335-1.
This part replaces GB 4706.1-1998 "Household and similar electrical appliances - Safety - Part 1: General requirements". There are main differences from GB 4706.1-1998 in the following aspects:
1) Chapter 14 in this part is "transient overvoltage". In GB 4706.1-1998, this chapter is blank.
2) Add Note 5 in 19.1.
3) Add notes in 19.2 and 19.3: Controls that operate during the test of Chapter 11 are allowed to operate.
4) Cancel Note 2 from 19.9.
5) Cancel Note 1 and 3 from 19.11. Note 2 is revised as "in general, examination of the appliance and its circuit diagram will reveal the fault conditions which have to be simulated, so that testing can be limited to those cases that may be expected to give the most unfavorable results".
6) Add article 19.11.3~ 19.11.4.7 in Chapter 19, and theses articles are not specified in GB 4706.1-1998.
7) Add "The appliance shall not undergo a dangerous malfunction, and there shall be no failure of protective electronic circuits if the appliance is still operable"; this requirements is not specified in GB 4706.1-1998.
8) The explanation about Chapter 29 is added this chapter:
Appliances shall be constructed so that the clearances, creepage distances and solid insulation are adequate to withstand the electrical stresses to which the appliance is liable to be subjected.
Compliance is checked by the requirements and tests of 29.1 to 29.3.
If coatings are used on printed circuit boards to protect the microenvironment (Type A coating) or to provide basic insulation (Type B coating), Annex J applies. The micro-environment is pollution degree 1 under Type A coating. There are no creepage distance or clearance requirements under Type B coating. These requirements are not specified in GB 4706.1-1998.
9) Add article 29.1.1~ 29.1.5 in Chapter 29, and these articles are not specified in GB 4706.1-1998.
10) add article 29.2.3~ 29.1.5 in Chapter 29, and these articles are not specified in GB 4706.1-1998.
After the implementation, this part will be replaces GB 4706.1-1998 gradually, because the special requirements applied to household electric appliance used in coordination with this part may be revised and improved for a long time. Before completing these standards, this part is only applicable to the newly-revised special requirements on household electric appliance used in coordination with this part.
In this part, Annex B, Annex C Annex D, Annex, Annex F, Annex G, Annex H, Annex I, Annex J, Annex K, Annex M, Annex N and Annex R are normative; Annex A, Annex L, Annex O, Annex P and Annex Q are informative; among them, Annex I, Annex Q and Annex R are newly added.
This part is proposed by the China Light Industry Federation.
This part is explained by and under the jurisdiction of the National Technical Committee 46 on Household Appliances Condenser of Standardization Administration of China.
Drafting organizations: China Household Electric Appliance Research Institute, Guangzhou Electric Apparatus Research Institute
Participating organization: Haier Group, Jiangsu Chunlan Refrigerating Equipment Stock Co. Ltd., China Quality Certification Center, Shanghai Entry-exit Inspection and Quarantine Bureau, Guangzhou Electrical Safety Testing Institute, Philips Electronics Hong Kong Ltd., Chengdu Rainbow Appliance (Group) Co., Ltd., Jiangsu Shinco Air-conditionor Co., Ltd., Ningbo FOTILE Kitchen Ware Co., Ltd., Zhejiang Kangquan Electrical Water Heater Co., Ltd., Ningbo Huikang (International) Co., Ltd., Guangdong (Midea) United Refrigeration Equipment Company, Panasonic Wanbao Compressor (Guangzhou) Co., Ltd., Xi'an Daikin Qing'an Compressor Co. Ltd., A. O. Smith (China) Water Heater Co., Ltd., Matsushita Electric (China) Co., Ltd., Electrolux (Hangzhou) Co., Ltd., Zhuhai Gree Electric Appliance Co., Ltd., Ningbo AUX Air Conditioning Company
Chief drafting staffs: Han Zuolaing, Ma Dejun, Xue Shouren, Hou Quanduo, Peng Yongtian, Zhou Xiaoming, Lu Mei, Wu Liaolan, Xu Tanrong, Zheng Chongkai, Zhang Hui, Zhu Jianjun, Wang Zhongwei, Wan Huaxin, Liu Xaingdong, Gao Xiaodong, Ouyang Na, Jia Weiqiang, Xu Zhong, Zhu Yongding, Wang Yali, Xie JInxiong, Zheng Feixia, Mao Binjun
This part was firstly issued in October 1984, firstly revised in January 1992, and secondly revided in December 1998.
IEC Foreword
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes other International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.
3) These IEC resolutions and agreement in the forms of standard, technical report or rules are published for international use and are accepted by IEC National Committees in that sense.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.
6) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of international standard IEC 60335 has been prepared by IEC technical committee 61: Safety of household and similar electrical appliances.
The fourth edition of this standard replaces the third edition (1991) and its amendment 1 (1994) and amendment 2 (1999). It forms a technical revision edition.
This standard is based on the following documents:
FDIS Voting report
61/1965/FDIS 61/1998/RVD
This amendment is based on the following documents:
FDIS Voting report
61/2569/FDIS 61/2639/RVD
All data when the related standard and amendments are approved by voting can be found out in above document.
The committee has decided that the general requirements and the amendments will be implemented till 2006, and at that time, the standard will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
These general requirements are to be used in conjunction with applicable special requirements. The special requirements contain Chapters to supplement or modify the corresponding (articles) Chapters in this part to provide the relevant requirements for each type of appliance.
Annexes B, C, D, E, F, G, H, I, J, K, M, N and R form an integral part of this standard.
Annexes A, L, O, P and Q are for information only.
Note 1: The following annexes contain provisions suitably modified from other IEC standards:
– Annex E Needle flame test IEC 60695-2-2
– Annex F Capacitors IEC 60384-14
– Annex G Safety isolating transformers IEC 61558-1 and IEC 61558-2-6
Words in bold in the text are defined in Chapter 3. When a definition concerns an adjective, the adjective and associated noun are also in bold.
The following differences exist in the countries indicated below.
– Chapter 3: Steady conditions are defined (Poland).
– 3.4.2: Safety extra-low voltage shall not exceed 30 V (42.4 V peak) (USA).
– 5.7: The ambient temperature is 25 ℃ ± 10 ℃ (Japan and USA).
– 5.14: Accessible metal parts that are not liable to become energized (such as metal nameplates or decorative parts on a plastic enclosure) do not need to be earthed. Accessible non-metallic parts need only provide basic insulation (USA).
– 6.1: Class 0 appliances and class 0I appliances are not allowed (Australia, Austria, Belgium, Czech Republic, Finland, France, Germany, Greece, Hungary, India, Israel, Ireland, Italy, Netherlands, New Zealand, Norway, Poland, Singapore, Slovakia, Sweden, Switzerland, United Kingdom, Yugoslavia).
– 6.2: Protection against harmful ingress of water is determined by methods other than those given in IEC 60529 (USA).
– 7.1: The IP number is not required to be marked (USA).
– 7.6: Some of these symbols are not used (USA).
– 7.8: Additional methods are permitted for identifying earthing terminals and terminals for neutral conductors (USA).
– 7.12.2: The requirements for full disconnection do not apply (Japan, USA).
– 7.14: Different tests are used (USA).
– 8.1.1: The test is not necessarily repeated with the 20 N force (USA).
– 8.1.1: Protection against contact with live parts of the lamp cap is not required (USA).
– 8.1.2 and 8.1.3: The test probe 13 and test probe 41 are not used (USA).
– 8.1.5: Built-in appliances, fixed appliances and appliances delivered in separate units are not required to be protected by at least basic insulation before installation (USA).
– Chapter 9: The ability of a motor to start without blowing a quick-acting fuse is required (USA).
– 10.1 and 10.2: Positive limits of 5 % for heating appliances and 10 % for motor-operated appliances are required and in general there are no negative deviations (USA).
– 11.4, 11.5 and 11.6: Heating appliances and heater circuits of combined appliances are operated at rated power input or rated voltage, whichever is the more severe; all other appliances and circuits are operated at rated voltage (USA).
– 11.8, table 3: Temperature rise limits for certain materials are different (USA).
– 13.2: The test circuit and some leakage current limits are different (India, USA).
– 13.3: The values of certain test voltages are different depending on the rated voltage (USA).
– 13.3: A 500 VA test transformer is used (USA).
– 15.1.1 and 15.1.2: The IP system is not used and the tests are different (USA).
– 15.3: The test is conducted with a relative humidity of (88 ± 2) % at a temperature of 32 ℃ ± 2 ℃ (USA).
– 16.2: The test is conducted at nominal supply voltage, and some of the leakage current values are different (USA).
– 16.3: Some test voltages and methods are different (USA).
– 19.1: The circuit protection device is permitted to provide necessary protection (USA).
– 19.2 to 19.4: Generally the tests are conducted at nominal supply voltage or rated power input (USA).
– 19.11: Different tests are carried out to evaluate solid state devices used in protective electronic circuits (USA).
– 19.13: The temperature rise limits of table 9 are not applicable (USA).
– 20.1: A stability test at 15° is not conducted, and an appliance tested in an overturned position is judged under abnormal test criteria (USA).
– 21.1: The impact force is applied by a falling steel ball instead of the spring hammer (USA).
– Chapter 22: The d.c. component in the appliance neutral is limited (Australia).
– 22.1: The IP system is not used and the tests are different (USA).
– 22.2: The second paragraph of this Article dealing with single-phase class I appliances with heating elements cannot be complied with because of the supply system (France and Norway).
– 22.2: Double-pole switches or protective devices are required (Norway).
– 22.2: Disconnection of the neutral is not necessary for all stationary appliances (USA).
– 22.2: The supply cord is not required to be fitted with a plug (Ireland).
– 22.3: The test is different (USA).
– 22.6: This test is not conducted (USA).
– 22.11: Different criteria for snap-on constructions are required (USA).
– 22.12: Positive forms of securement are required (USA).
– 22.14: Sharp edges are evaluated by means of a sharp edge testing device (USA).
– 22.35 and 22.36: Metal parts are generally not required to be separated by double or reinforced insulation (USA).
– 22.44: Appliances may be acceptable based on additional evaluation (USA).
– 22.46: The evaluation of software is different (USA).
– 23.5: Requirements for insulated internal wiring are different (USA).
– 23.7: The requirement only applies to wiring that is accessible when making supply connections (USA).
– 24.1.3: The number of cycles is different and the note does not apply (USA).
– 24.1.4: The number of cycles is different and note 1 does not apply (USA).
– 24.3: The requirement for full disconnection does not apply (USA).
– 25.1: The supply cord is not required to be fitted with a plug (Ireland).
– 25.3: A set of supply leads is not permitted (Norway, Sweden, Denmark, Finland, Netherlands).
– 25.3: The use of a set of terminals for connection of a flexible cord is not generally permitted (USA).
– 25.8: Conductor cross-sectional areas are different (Australia, New Zealand and USA).
– 25.8: 0.5 mm2 supply cords are not allowed for class I appliances (Australia and New Zealand).
– 25.10: Green insulation is also permitted (USA).
– 25.13: Only one separate insulation is required (USA).
– 25.16: A pull of 35 lbs is applied except for small appliances. Generally the torque test is not applied (USA).
– 26.3: The tests only apply to terminals for connection to fixed wiring (USA).
– 26.6: Cross-sectional areas are specified according to American Wire Gauge (AWG) (USA).
– 27.6: The requirement does not apply (USA).
– 28.1: Generally, tests of this type are not required (USA).
– Chapter 29: The requirements for clearances and creepage distances are different (USA).
– 29.1 Different rated impulse voltages are used between 50 V and 150 V (Japan).
– 29.3 The third dashed item of the test specification does not apply (Germany).
– 30.1: The minimum value for the ball-pressure test for parts retaining live parts is 95 ℃ or 40 K higher than the Chapter 11 temperature rise. For enclosures, the minimum value is 75 ℃ or a mould-stress test is conducted at 10 K above the Chapter 11 temperature (USA).
– 30.2.1: An ignition test cannot be used to assure a slow burning rate (USA).
– Annex B, 7.12: Appliances having non-replaceable batteries shall be marked with an appropriate symbol when the batteries have a content of mercury or cadmium exceeding 0.025 % by weight (Sweden and Switzerland).
– Annex B, 21.101: The requirement is different (USA).
– Annex I: The annex applies to motors having a working voltage not exceeding 30 V (USA).
Contents
1 Scope 1
2 Normative References 1
3 Definitions 5
4 General Requirement 11
5 General Conditions for the Tests 11
6 Classification 13
7 Marking and instructions 14
8 Protection against access to live parts 19
9 Starting of motor-operated appliances 20
10 Power input and current 21
11 Heating 22
12 Void 26
13 Leakage current and electric strength at operating temperature 26
14 Transient overvoltages 28
15 Moisture resistance 29
16 Leakage current and electric strength 31
17 Overload protection of transformers and associated circuits 33
18 Endurance 33
19 Abnormal operation 33
20 Stability and mechanical hazards 40
21 Mechanical strength 41
22 Construction 42
23 Internal wiring 50
24 Components 52
25 Supply connection and external flexible cords 54
26 Terminals for external conductors 60
27 Provision for earthing 63
28 Screws and connections 64
29 Clearances, creepage distances and solid insulation 67
30 Resistance to heat and fire 72
31 Resistance to rusting 75
32 Radiation, toxicity and similar hazards 75
Annex A (informative) Routine tests 81
Annex B (normative) Appliances powered by rechargeable batteries 83
Annex C (normative) Ageing test on motors 85
Annex D (Normative) Thermal motor protectors 86
Annex E (Normative) Needle flame test 87
Annex F (Normative) Capacitors 88
Annex G (normative) Safety isolating transformers 90
Annex H (normative) Switches 91
Annex I (normative) Motors having basic insulation that is inadequate for the rated voltage of the appliance 92
Annex L (informative) Guidance for the measurement of clearances and creepage distances 96
Annex N (normative) Proof tracking test 99
Annex O (informative) Selection and sequence of the tests of Chapter 30 100
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits 103
Annex R (normative) Software evaluation 105
Introduction
It has been assumed in the drafting of this international standard that the execution of its provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal use taking into account the manufacturer's instructions. It also covers abnormal situations that can be expected in practice and takes into account the way in which electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of GB 16895 as far as possible so that there is compatibility with the wiring rules when the appliance is connected to the supply mains. However, national wiring rules may differ.
If the functions of an appliance are covered by different parts 2 of GB 4706, the relevant part 2 is applied to each function separately, as far as is reasonable. If applicable, the influence of one function on the other is taken into account.
Note 1: Throughout this publication, when “Part 2” is mentioned, it refers to the relevant part of GB 4706.
This standard is a product family standard dealing with the safety of appliances and takes precedence over horizontal and generic standards covering the same subject.
Individual countries may wish to consider the application of the standard, as far as is reasonable, to appliances not mentioned in a part 2, and to appliances designed on new principles.
An appliance that complies with the text of this standard will not necessarily be considered to comply with the safety principles of the standard if, when examined and tested, it is found to have other features which impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed in the requirements of this standard may be examined and tested according to the intent of the requirements and, if found to be substantially equivalent, may be considered to comply with the standard.
Note 2: Standards dealing with non-safety aspects of household appliances are
– IEC standards published by TC 59 concerning methods of measuring performance;
Household and Similar Electrical Appliances – Safety –
Part 1: General Requirements
1 Scope
This part deals with the safety of electrical appliances for household and similar purposes, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard.
Note 1: Examples of such appliances are catering equipment, cleaning appliances for industrial and commercial use, and appliances for hairdressers.
As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account – the use of appliances by young children or infirm persons without supervision, – playing with the appliance by young children.
Note 2: Attention is drawn to the fact that – for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; – in many countries additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
Note 3: This standard does not apply to
– appliances intended exclusively for industrial purposes;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
– audio, video and similar electronic apparatus (GB 8898);
– appliances for medical purposes (GB 9706.1);
– hand-held motor-operated electric tools (GB 3883.1);
– personal computers and similar equipment (GB 4943);
– transportable motor-operated electric tools (GB 13960).
2 Normative References
The following standards contain provisions which, through reference in GB 4706, constitute provisions of this part. For dated reference, subsequent amendments to excluding correction to, or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions these labels are applied or not. For undated references, the latest edition of the normative document is applicable to this part.
GB 1406 Types and dimensions of Edison screw lamp caps (GB 1406-2001, eqv IEC 60061-1: 1999)
GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications (GB/T 1804-2000, eqv ISO 2768-1: 1989)
GB/T 2423.2 Environmental testing - Part 2: Test methods - Tests B: Dry heat (GB/T 2423.2-2001, idt IEC 60068-2-2: 1974)
GB/T 2423.8 Environmental testing for electric and electronic products Part 2: Test methods Test Ed: Free fall (GB/T 2423.8-1995, idt IEC 60068-2-32: 1990)
GB 3667 A.C. motor capacitors (GB 3667-1997, idt IEC 60252: 1992)
GB 4208 Degrees of protection provided by enclosure (IP code) (GB 4208-1993, eqv IEC 60529: 1989)
GB/T 5169.5-1997 Fire hazard testing for electric and electronic products-Part 2: Test methods-Section 2: Needle-flame test (idt IEC 60695-2-2: 1991)
GB/T 5169.11 Fire hazard testing for electric and electronic products-Test methods-Glow-wire end-product test and guidance (GB/T 5169.11-1997, idt IEC 60695-2-11: 1994)
GB/T 5169.12 Fire hazard testing for electric and electronic products-Test methods-Glow -wire flammability test on materials (GB/T 5169.12-1999, idt IEC 60695-2-12: 1994)
GB/T 5169.13 Fire hazard testing for electric and electronic products-Test methods-Glow-wire ignitability test on materials (GB/T 5169.13-1999, idt IEC 60695-2-13: 1994)
GB/T 5169.16 Fire hazard testing for electric and electronic products--Part 16:50 W horizontal and vertical flame test methods (GB/T 5169.16-2002, IEC 60695-11-10: 1999, IDT)
GB/T 7153 Directly heated positive step-function temperature coefficient thermistors -- Part 1:Generic specification (GB/T 7153-2002, IEC 60738-1: 1998, IDT)
GB/T 12113-2003 Methods of measurement of touch current and protective conductor current (IEC 60990: 1999, IDT)
GB/T 14472-1998 Fixed capacitors for use in electronic equipment --Part 14: Sectional specification Fixed capacitors for electromagnetic interference suppression and connection to the supply mains (idt IEC 60384-14: 1993)
GB/T 16935.1-1997 Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests (idt IEC 60664-1: 1992) IEC 60664-1
Amendment 1 (2000)
Amendment 2 (2002) )
GB 17465.1 Appliance couplers for household and similar general purposes -- Part 1: General requirements (GB 17465.1-1998, eqv IEC 60320-1: 1994)
GB 17465.2 Appliance couplers for household and similar general purposes -- Part 2: Interconnection couplers for household and similar equipment (GB 17465.2-1998, eqv IEC 60320-2-2: 1990)
GB/T 17626.2 Electromagnetic compatibility--Testing and measurement techniques--Electrostatic discharge immunity test (GB/T 17626.2-1998, idt IEC 61000-4-2: 1995)
GB/T 17626.3 Electromagnetic compatibility--Testing and measurement techniques-- Radiated, radio-frequency, electromagnetic field immunity test (GB/T 17626.3-1998, idt IEC 61000-4-3: 1995)
GB/T 17626.4 Electromagnetic compatibility-- Testing and measurement techniques --Electrical fast transient/burst immunity test (GB/T 17626.4-1998, idt IEC 61000-4-4: 1995)
GB/T 17626.5 Electromagnetic compatibility--Testing and measurement techniques--Surge immunity test (GB/T 17626.5-1999, idt IEC 61000-4-5: 1995)
GB/T 17626.6 Electromagnetic compatibility --Testing and measurement techniques --Immunity to conducted disturbances, induced by radio-frequency fields (GB/T 17626.6-1998, idt IEC 61000-4-6: 1996)
GB/T 17626.11-1999 Electromagnetic compatibility Testing and measurement techniques Voltage dips, short interruptions and voltage variations immunity tests (idt IEC 61000-4-11: 1994)
IEC 61000-4-11 amendment 1 (2000) )
GB/T 17627.1 High-voltage test techniques for low-voltage equipment Part 1: Definitions, test and procedure requirements (GB/T 17627.1-1998, eqv IEC 61180-1: 1992)
GB/T 17627.2 High-voltage test techniques for low-voltage equipment Part 2: Measuring system and test equipment (GB/T 17627.2-1998, eqv IEC 61180-2: 1994)
IEC 60068-2-75 Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests
IEC/TR3 60083 Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC )
IEC 60085 Electrical insulation – Thermal evaluation and designation
IEC 60112: 2003 Method for the Determination of the Proof and the Comparative Tracking Indices of Solid Insulating Materials
IEC 60127 (all parts) miniature fuses
IEC 60227 (all parts) Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including 450/750 V IEC 60245 (all parts) Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60249-2-4: 1987 Base materials for printed circuits. Part 2: Specifications. Specification No. 4: Epoxide woven glass fabric copper-clad laminated sheet, general purpose grade
Amendment 1 (1989)
Amendment 2 (1992)
Amendment 3 (1993)
Amendment 4 (1994)
Amendment 5 (2000)
IEC 60249-2-5: 1987 Base Materials for Printed Circuits Part 2: Specifications Specification No. 5: Epoxide Woven Glass Fabric Copper-Clad Laminated Sheet of Defined Flammability (Vertical Burning Test)
Amendment 1 (1989)
Amendment 2 (1992)
Amendment 3 (1993)
Amendment 4 (1994)
Amendment 5 (2000)
IEC 60320-2-3 Appliance coupler for household and similar general purposes - Part 2-3: Appliance coupler with a degree of protection higher than IPX0
IEC 60417-DB: 2002 Graphical symbols for use on equipment
IEC 60598-1: 2003 Luminaires - Part 1: General requirements and tests
IEC 60664-3: 1992 Insulation coordination for equipment within low-voltage systems – Part 3: Use of coating, potting or moulding for protection against pollution
IEC 60695-10-2 Fire hazard testing - Part 10-2: Abnormal heat - Ball pressure test
IEC 60730-1: 1999 Automatic electrical controls for household and similar use - Part 1: General requirements
IEC 60730-2-8: 2000 Automatic electrical controls for household and similar use - Part 2-8: Particular requirements for electrically operated water valves, including mechanical requirements
IEC 60906-1 IEC system of plugs and socket-outlets for household and similar purposes - Part 1: Plugs and socket-outlets 16A 250V a.c.
IEC 60999-1: 1999 Connecting Devices - Electrical Copper Conductors - Safety Requirements for Screw-Type and Screwless-Type Clamping Units - Part 1: General Requirements and Particular Requirements for Clamping Units for Conductors from 0.2 mm Squared up to 35 mm Squared
IEC 61000-4-13 Electromagnetic compatibility (EMC) - Part 4-13: Testing and measurement techniques - Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity tests
IEC 61032: 1997 Protection of persons and equipment by enclsures-probes for verification
IEC 61058-1: 2000
IEC 61058-1 amendment 1 (2001) )
IEC 61558-1: 1997 Safety of power transformers, power supplies, reactors and similar products – Part 1: General requirements and tests
IEC 61558-2-6: 1997 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers
IEC 61770 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
ISO 7000 Graphical symbols for use on equipment -- Index and synopsis
ISO 9772: 2001 Cellular plastics -- Determination of horizontal burning characteristics of small specimens subjected to a small flame
Note: if there are differences between the national standard and the referenced IEC standards, the IEC standards are referenced for concrete analysis.
3 Definitions
An Index of the defined terms is provided at the end of this publication.
3.1 When the terms “voltage” and “current” are used, they are r.m.s. values, unless otherwise specified.
3.1.1 Rated voltage
Voltage assigned to the appliance by the manufacturer
3.1.2 Rated voltage range
Voltage range assigned to the appliance by the manufacturer, expressed by its lower and upper limits
3.1.3 Working voltage maximum
Voltage to which the part under consideration is subjected when the appliance is supplied at its rated voltage and operating under normal operation.
Note 1: The different positions of controls and switching devices are taken into account.
Note 2: Working voltage takes into account resonant voltages.
Note 3: When deducing the working voltage, the effect of transient voltages is ignored.
3.1.4 Rated power input
Power input assigned to the appliance by the manufacturer
3.1.5 Rated power input range
Power input range assigned to the appliance by the manufacturer, expressed by its lower and upper limits
3.1.6 Rated current
Current assigned to the appliance by the manufacturer.
Note: If no current is assigned to the appliance, the rated current is
– For heating appliances, the current calculated from the rated power input and the rated voltage;
– For motor-operated appliances and combined appliances, the current measured when the appliance is supplied at rated voltage and operated under normal operation.
3.1.7 Rated frequency
Frequency assigned to the appliance by the manufacturer.
3.1.8 Rated frequency range
Frequency range assigned to the appliance by the manufacturer, expressed by its lower and upper limits.
3.1.9 Normal operation
Conditions under which the appliance is operated in normal use when it is connected to the supply mains.
3.1.10 Rated impulse voltage
Voltage derived from the rated voltage and the overvoltage category of the appliance, characterizing the specified withstand capability of its insulation against transient over-voltages.
3.1.11 Dangerous malfunction
Unintended operation of the appliance that may impair safety.
3.2
3.2.1 Detachable cord
Flexible cord, for supply or interconnection, intended to be connected to the appliance by means of a suitable appliance coupler.
3.2.2 Interconnection cord
External flexible cord provided as part of a complete appliance for purposes other than connection to the supply mains.
Note: A remote hand-held switching device, an external interconnection between two parts of an appliance and a cord connecting an accessory to the appliance or to a separate signalling circuit are examples of interconnection cords.
3.2.3 Supply cord
Flexible cord, for supply purposes, that is fixed to the appliance.
3.2.4 Type X attachment
Method of attachment of the supply cord such that it can easily be replaced.
Note: The supply cord may be specially prepared and only available from the manufacturer or its service agent. A specially prepared cord may include a part of the appliance.
3.2.5 Type Y attachment
Method of attachment of the supply cord such that any replacement is intended to be made by the manufacturer, its service agent or similar qualified person
3.2.6 type Z attachment
method of attachment of the supply cord such that it cannot be replaced without breaking or destroying the appliance
3.2.7 Supply leads
Set of wires intended for connecting the appliance to fixed wiring and accommodated in a compartment within or attached to the appliance
3.3
3.3.1 Basic insulation
Insulation applied to live parts to provide basic protection against electric shock.
3.3.2 Supplementary insulation
Independent insulation applied in addition to basic insulation, in order to provide protection against electric shock in the event of a failure of basic insulation.
3.3.3 Double insulation
Insulation system comprising both basic insulation and supplementary insulation.
3.3.4 Reinforced insulation
Single insulation applied to live parts, that provides a degree of protection against electric shock equivalent to double insulation under the conditions specified in this standard.
Note: It is not implied that the insulation is one homogeneous piece. The insulation may comprise several layers which cannot be tested singly as supplementary insulation or basic insulation.
3.3.5 Functional insulation
insulation between conductive parts of different potential which is necessary only for the proper functioning of the appliance.
3.3.6 Protective impedance
Impedance connected between live parts and accessible conductive parts of class II constructions so that the current, in normal use and under likely fault conditions in the appliance, is limited to a safe value.
3.3.7 Class 0 appliance
Appliance in which protection against electric shock relies upon basic insulation only, there being no means for the connection of conductive accessible parts, if any, to the protective conductor in the fixed wiring of the installation, reliance in the event of a failure of the basic insulation being placed upon the environment
Note: Class 0 appliances have either an enclosure of insulating material which may form a part or the whole of the basic insulation, or a metal enclosure which is separated from live parts by an appropriate insulation. If an appliance with an enclosure of insulating material has provision for earthing internal parts, it is considered to be a class I appliance or class 0I appliance.
3.3.8 Class 0I appliance
Appliance having at least basic insulation throughout and incorporating an earthing terminal but having a supply cord without earthing conductor and a plug without earthing contact 60335-1
3.3.9 Class I appliance
Appliance in which protection against electric shock does not rely on basic insulation only but which includes an additional safety precaution, in that conductive accessible parts are connected to the protective earthing conductor in the fixed wiring of the installation in such a way that conductive accessible parts cannot become live in the event of a failure of the basic insulation Note: This provision includes a protective earthing conductor in the supply cord.
3.3.10 Class II appliance
Appliance in which protection against electric shock does not rely on basic insulation only but in which additional safety precautions are provided, such as double insulation or reinforced insulation, there being no provision for protective earthing or reliance upon installation conditions
Note 1: Such an appliance may be of one of the following types:
– an appliance having a durable and substantially continuous enclosure of insulating material which envelops all metal parts, with the exception of small parts, such as nameplates, screws and rivets, which are isolated from live parts by insulation at least equivalent to reinforced insulation; such an appliance is called an insulation-encased class II appliance;
– an appliance having a substantially continuous metal enclosure, in which double insulation or reinforced insulation is used throughout; such an appliance is called a metal-encased class II appliance;
– an appliance which is a combination of an insulation-encased class II appliance and a metal-encased class II appliance.
Note 2: The enclosure of an insulation-encased class II appliance may form a part or the whole of the supplementary insulation or of the reinforced insulation.
Note 3: If an appliance with double insulation or reinforced insulation throughout has provision for earthing, it is considered to be a class I appliance or a class 0I appliance.
3.3.11 Class II construction
Part of an appliance for which protection against electric shock relies upon double insulation or reinforced insulation
3.3.12 Class III appliance
Appliance in which protection against electric shock relies on supply at safety extra-low voltage and in which voltages higher than those of safety extra-low voltage are not generated
3.3.13 class III construction
part of an appliance for which protection against electric shock relies upon safety extra-low voltage and in which voltages higher than those of safety extra-low voltage are not generated 3.3.14 Clearance
Shortest distance in air between two conductive parts or between a conductive part and the accessible surface
3.3.15 Creepage distance
Shortest distance along the surface of insulation between two conductive parts or between a conductive part and the accessible surface
3.4
3.4.1 Extra-low voltage
Voltage supplied from a source within the appliance that does not exceed 50 V between conductors and between conductors and earth when the appliance is supplied at rated voltage
3.4.2 Safety extra-low voltage
Voltage not exceeding 42 V between conductors and between conductors and earth, the no-load voltage not exceeding 50 V
When safety extra-low voltage is obtained from the supply mains, it is to be through a safety isolating transformer or a convertor with separate windings, the insulation of which complies with double insulation or reinforced insulation requirements.
Note 1: The voltage limits specified are based on the assumption that the safety isolating transformer is supplied at its rated voltage.
Note 2: Safety extra-low voltage is also known as SELV.
3.4.3 Safety isolating transformer
Transformer, the input winding of which is electrically separated from the output winding by an insulation at least equivalent to double insulation or reinforced insulation, that is intended to supply an appliance or circuit at safety extra-low voltage
3.4.4 Protective extra-low voltage circuit
Earthed circuit operating at safety extra-low voltage which is separated from other circuits by basic insulation and protective screening, double insulation or reinforced insulation
Note 1: Protective screening is the separation of circuits from live parts by means of an earthed screen.
Note 2: A protective extra-low voltage circuit is also known as a PELV circuit.
3.5
3.5.1 Portable appliance
Appliance that is intended to be moved while in operation or an appliance, other than a fixed appliance, having a mass less than 18 kg
3.5.2 Hand-held appliance
Portable appliance intended to be held in the hand during normal use
3.5.3 Stationary appliance
Fixed appliance or an appliance which is not a portable appliance
3.5.4 Fixed appliance
Appliance that is intended to be used while fastened to a support or while secured in a specific location
3.5.5 Built-in appliance
Fixed appliance intended to be installed in a cabinet, in a prepared recess in a wall or in a similar location
3.5.6 Heating appliance
Appliance incorporating heating elements but without any motor
3.5.7 Motor-operated appliance
Appliance incorporating motors but without any heating element
Note: Magnetically driven appliances are considered to be motor-operated appliances.
3.5.8 Combined appliance
Appliance incorporating heating elements and motors
3.6
3.6.1 Non-detachable part
Part that can only be removed or opened with the aid of a tool or a part that fulfills the test of 22.11
3.6.2 Detachable part
Part that can be removed without the aid of a tool, a part that is removed in accordance with the instructions for use, even if a tool is needed for removal, or a part that does not fulfill the test of 22.11.
Note 1: If for installation purposes a part has to be removed, this part is not considered to be detachable even if the instructions state that it is to be removed.
Note 2: Components that can be removed without the aid of a tool are considered to be detachable parts.
Note 3: A part that can be opened is considered to be a part that can be removed.
3.6.3 Accessible part
Part or surface that can be touched by means of test probe B of IEC 61032, and if the part or surface is metal, any conductive part connected to it
3.6.4 Live part
Conductor or conductive part intended to be energized in normal use, including a neutral conductor but, by convention, not a PEN conductor
Note 1: Parts, accessible or not, complying with 8.1.4 are not considered to be live parts.
Note 2: A PEN conductor is a protective earthed neutral conductor combining the functions of both a protective conductor and a neutral conductor.
3.6.5 Tool
Screwdriver, coin or any other object that may be used to operate a screw or similar fixing means
3.7
3.7.1 Thermostat
Temperature-sensing device, the operating temperature of which may be either fixed or adjustable and which during normal operation keeps the temperature of the controlled part between certain limits by automatically opening and closing a circuit
3.7.2 Temperature limiter
Temperature-sensing device, the operating temperature of which may be either fixed or adjustable and which during normal operation operates by opening or closing a circuit when the temperature of the controlled part reaches a predetermined value
Note: It does not make the reverse operation during the normal duty cycle of the appliance. It may or may not require manual resetting.
3.7.3 Thermal cut-out
Device which during abnormal operation limits the temperature of the controlled part by automatically opening the circuit, or by reducing the current, and is constructed so that its setting cannot be altered by the user
3.7.4 Self-resetting thermal cut-out
Thermal cut-out that automatically restores the current after the relevant part of the appliance has cooled down sufficiently
3.7.5 Non-self-resetting thermal cut-out
Thermal cut-out that requires a manual operation for resetting, or replacement of a part, in order to restore the current
Note: Manual operation includes disconnection of the appliance from the supply mains.
3.7.6 Protective device
Device, the operation of which prevents a hazardous situation under abnormal operation conditions
3.7.7 Thermal link thermal cut-out which operates only once and requires partial or complete replacement
3.8
3.8.1 All-pole disconnection
Disconnection of both supply conductors by a single initiating action or, for three-phase appliances, disconnection of the three supply conductors by a single initiating action
Note: For three-phase appliances, the neutral conductor is not considered to be a supply conductor.
3.8.2 Off position
Stable position of a switching device in which the circuit controlled by the switch is disconnected from its supply or, for electronic disconnection, the circuit is de-energized
Note: The off position does not imply an all-pole disconnection.
3.8.3 Visibly glowing heating element
Heating element that is partly or completely visible from the outside of the appliance and has a temperature of at least 650 ℃ when the appliance has been operated under normal operation at rated power input until steady conditions have been established
3.8.4 PTC heating element
Element intended for heating consisting mainly of positive temperature coefficient resistors that are thermally sensitive and have a rapid non-linear increase in resistance when the temperature is raised through a particular range
3.8.5 User maintenance
Any maintenance operation stated in the instructions for use, or marked on the appliance, that the user is intended to perform
3.9
3.9.1 Electronic component
Part in which conduction is achieved principally by electrons moving through a vacuum, gas or semiconductor
Note: Neon indicators are not considered to be electronic components.
3.9.2 Electronic circuit
Circuit incorporating at least one electronic component
3.9.3 Protective electronic circuit
Electronic circuit that prevents a hazardous situation under abnormal operating conditions
Note: Parts of the circuit may also be used for functional purposes.
3.9.4 Software class B
Software that includes code intended to prevent hazards if a fault, other than a software fault, occurs in the appliance
3.9.5 Software class C
Software that includes code intended to prevent hazards without the use of other protective devices.
4 General Requirement
Appliances shall be constructed so that in normal use they function safely so as to cause no danger to persons or surroundings, even in the event of carelessness that may occur in normal use.
In general this principle is achieved by fulfilling the relevant requirements specified in this standard and compliance is checked by carrying out all the relevant tests.
5 General Conditions for the Tests
Unless otherwise specified, the tests are carried out in accordance with this Chapter.
5.1 Tests according to this standard are type tests.
Note: Routine tests are described in annex A.
5.2 The tests are carried out on a single appliance that shall withstand all the relevant tests.
However, the tests of Chapters 20, 22 (except 22.11 and 22.18) to 26, 28, 30 and 31 may be carried out on separate appliances. The test of 22.3 is carried out on a new appliance.
Note 1: Additional samples may be required if the appliance has to be tested under different conditions, for example if it can be supplied with different voltages.
If an intentionally weak part becomes open circuit during the tests of Chapter 19, an additional appliance may be needed.
The testing of components may require the submission of additional samples of these components.
If the test of annex C has to be carried out, six samples of the motor are needed.
If the test of annex D has to be carried out, an additional appliance may be used.
If the tests of annex G are carried out, four additional transformers are needed.
If the tests of annex H are carried out, three switches or three additional appliances are needed.
Note 2: The cumulative stress resulting from successive tests on electronic circuits is to be avoided. It may be necessary to replace components or to use additional samples. The number of additional samples should be kept to a minimum by an evaluation of the relevant electronic circuits.
Note 3: If an appliance has to be dismantled in order to carry out a test, care is to be taken to insure that it is reassembled as originally supplied. In case of doubt, subsequent tests may be carried out on a separate sample.
5.3 The tests are carried out in the order of the Chapters. However, the test of 22.11 on the appliance at room temperature is carried out before the tests of Chapter 8. The tests of Chapter 14 and 21.2 and 22.24 are carried out after the tests of Chapter 29.
If it is evident from the construction of the appliance that a particular test is not applicable, the test is not carried out.
1 Scope 2 Normative References 3 Definitions 4 General Requirement 5 General Conditions for the Tests 6 Classification 7 Marking and instructions 8 Protection against access to live parts 9 Starting of motor-operated appliances 10 Power input and current 11 Heating 12 Void 13 Leakage current and electric strength at operating temperature 14 Transient overvoltages 15 Moisture resistance 16 Leakage current and electric strength 17 Overload protection of transformers and associated circuits 18 Endurance 19 Abnormal operation 20 Stability and mechanical hazards 21 Mechanical strength 22 Construction 23 Internal wiring 24 Components 25 Supply connection and external flexible cords 26 Terminals for external conductors 27 Provision for earthing 28 Screws and connections 29 Clearances, creepage distances and solid insulation 30 Resistance to heat and fire 31 Resistance to rusting 32 Radiation, toxicity and similar hazards Annex A (informative) Routine tests Annex B (normative) Appliances powered by rechargeable batteries Annex C (normative) Ageing test on motors Annex D (Normative) Thermal motor protectors Annex E (Normative) Needle flame test Annex F (Normative) Capacitors Annex G (normative) Safety isolating transformers Annex H (normative) Switches Annex I (normative) Motors having basic insulation that is inadequate for the rated voltage of the appliance Annex J (normative) Coated printed circuit boards Annex K (normative) Overvoltage categories Annex L (informative) Guidance for the measurement of clearances and creepage distances Annex N (normative) Proof tracking test Annex O (informative) Selection and sequence of the tests of Chapter Annex Q (informative) Sequence of tests for the evaluation of electronic circuits Annex R (normative) Software evaluation
All provisions of this standard are compulsory.
GB 4706 is a safety standard series for household and similar electrical appliances, and consists of the following parts:
Part 1: General Requirements;
Part 2: special requirement.
This part is the first part of GB 4706.
This part is identical to IEC 60335-1 "Household and similar electrical appliances - Safety - Part 1: General requirements" (Edition 4.1) (2004). In this part, the contents with corresponding national standard available references the national standards; the ones without corresponding national standard available reference IEC standards listed.
The arrangement order of Chapter 2 "normative references" in this part is different from the one of IEC 60335-1.
This part replaces GB 4706.1-1998 "Household and similar electrical appliances - Safety - Part 1: General requirements". There are main differences from GB 4706.1-1998 in the following aspects:
1) Chapter 14 in this part is "transient overvoltage". In GB 4706.1-1998, this chapter is blank.
2) Add Note 5 in 19.1.
3) Add notes in 19.2 and 19.3: Controls that operate during the test of Chapter 11 are allowed to operate.
4) Cancel Note 2 from 19.9.
5) Cancel Note 1 and 3 from 19.11. Note 2 is revised as "in general, examination of the appliance and its circuit diagram will reveal the fault conditions which have to be simulated, so that testing can be limited to those cases that may be expected to give the most unfavorable results".
6) Add article 19.11.3~ 19.11.4.7 in Chapter 19, and theses articles are not specified in GB 4706.1-1998.
7) Add "The appliance shall not undergo a dangerous malfunction, and there shall be no failure of protective electronic circuits if the appliance is still operable"; this requirements is not specified in GB 4706.1-1998.
8) The explanation about Chapter 29 is added this chapter:
Appliances shall be constructed so that the clearances, creepage distances and solid insulation are adequate to withstand the electrical stresses to which the appliance is liable to be subjected.
Compliance is checked by the requirements and tests of 29.1 to 29.3.
If coatings are used on printed circuit boards to protect the microenvironment (Type A coating) or to provide basic insulation (Type B coating), Annex J applies. The micro-environment is pollution degree 1 under Type A coating. There are no creepage distance or clearance requirements under Type B coating. These requirements are not specified in GB 4706.1-1998.
9) Add article 29.1.1~ 29.1.5 in Chapter 29, and these articles are not specified in GB 4706.1-1998.
10) add article 29.2.3~ 29.1.5 in Chapter 29, and these articles are not specified in GB 4706.1-1998.
After the implementation, this part will be replaces GB 4706.1-1998 gradually, because the special requirements applied to household electric appliance used in coordination with this part may be revised and improved for a long time. Before completing these standards, this part is only applicable to the newly-revised special requirements on household electric appliance used in coordination with this part.
In this part, Annex B, Annex C Annex D, Annex, Annex F, Annex G, Annex H, Annex I, Annex J, Annex K, Annex M, Annex N and Annex R are normative; Annex A, Annex L, Annex O, Annex P and Annex Q are informative; among them, Annex I, Annex Q and Annex R are newly added.
This part is proposed by the China Light Industry Federation.
This part is explained by and under the jurisdiction of the National Technical Committee 46 on Household Appliances Condenser of Standardization Administration of China.
Drafting organizations: China Household Electric Appliance Research Institute, Guangzhou Electric Apparatus Research Institute
Participating organization: Haier Group, Jiangsu Chunlan Refrigerating Equipment Stock Co. Ltd., China Quality Certification Center, Shanghai Entry-exit Inspection and Quarantine Bureau, Guangzhou Electrical Safety Testing Institute, Philips Electronics Hong Kong Ltd., Chengdu Rainbow Appliance (Group) Co., Ltd., Jiangsu Shinco Air-conditionor Co., Ltd., Ningbo FOTILE Kitchen Ware Co., Ltd., Zhejiang Kangquan Electrical Water Heater Co., Ltd., Ningbo Huikang (International) Co., Ltd., Guangdong (Midea) United Refrigeration Equipment Company, Panasonic Wanbao Compressor (Guangzhou) Co., Ltd., Xi'an Daikin Qing'an Compressor Co. Ltd., A. O. Smith (China) Water Heater Co., Ltd., Matsushita Electric (China) Co., Ltd., Electrolux (Hangzhou) Co., Ltd., Zhuhai Gree Electric Appliance Co., Ltd., Ningbo AUX Air Conditioning Company
Chief drafting staffs: Han Zuolaing, Ma Dejun, Xue Shouren, Hou Quanduo, Peng Yongtian, Zhou Xiaoming, Lu Mei, Wu Liaolan, Xu Tanrong, Zheng Chongkai, Zhang Hui, Zhu Jianjun, Wang Zhongwei, Wan Huaxin, Liu Xaingdong, Gao Xiaodong, Ouyang Na, Jia Weiqiang, Xu Zhong, Zhu Yongding, Wang Yali, Xie JInxiong, Zheng Feixia, Mao Binjun
This part was firstly issued in October 1984, firstly revised in January 1992, and secondly revided in December 1998.
IEC Foreword
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes other International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.
3) These IEC resolutions and agreement in the forms of standard, technical report or rules are published for international use and are accepted by IEC National Committees in that sense.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.
6) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This part of international standard IEC 60335 has been prepared by IEC technical committee 61: Safety of household and similar electrical appliances.
The fourth edition of this standard replaces the third edition (1991) and its amendment 1 (1994) and amendment 2 (1999). It forms a technical revision edition.
This standard is based on the following documents:
FDIS Voting report
61/1965/FDIS 61/1998/RVD
This amendment is based on the following documents:
FDIS Voting report
61/2569/FDIS 61/2639/RVD
All data when the related standard and amendments are approved by voting can be found out in above document.
The committee has decided that the general requirements and the amendments will be implemented till 2006, and at that time, the standard will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
These general requirements are to be used in conjunction with applicable special requirements. The special requirements contain Chapters to supplement or modify the corresponding (articles) Chapters in this part to provide the relevant requirements for each type of appliance.
Annexes B, C, D, E, F, G, H, I, J, K, M, N and R form an integral part of this standard.
Annexes A, L, O, P and Q are for information only.
Note 1: The following annexes contain provisions suitably modified from other IEC standards:
– Annex E Needle flame test IEC 60695-2-2
– Annex F Capacitors IEC 60384-14
– Annex G Safety isolating transformers IEC 61558-1 and IEC 61558-2-6
– Annex H Switches IEC 61058-1
– Annex J Coated printed circuit boards IEC 60664-3
– Annex N Proof tracking test IEC 60112
– Annex R Software evaluation IEC 60730-1
Note 2: The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
Words in bold in the text are defined in Chapter 3. When a definition concerns an adjective, the adjective and associated noun are also in bold.
The following differences exist in the countries indicated below.
– Chapter 3: Steady conditions are defined (Poland).
– 3.4.2: Safety extra-low voltage shall not exceed 30 V (42.4 V peak) (USA).
– 5.7: The ambient temperature is 25 ℃ ± 10 ℃ (Japan and USA).
– 5.14: Accessible metal parts that are not liable to become energized (such as metal nameplates or decorative parts on a plastic enclosure) do not need to be earthed. Accessible non-metallic parts need only provide basic insulation (USA).
– 6.1: Class 0 appliances and class 0I appliances are not allowed (Australia, Austria, Belgium, Czech Republic, Finland, France, Germany, Greece, Hungary, India, Israel, Ireland, Italy, Netherlands, New Zealand, Norway, Poland, Singapore, Slovakia, Sweden, Switzerland, United Kingdom, Yugoslavia).
– 6.2: Protection against harmful ingress of water is determined by methods other than those given in IEC 60529 (USA).
– 7.1: The IP number is not required to be marked (USA).
– 7.6: Some of these symbols are not used (USA).
– 7.8: Additional methods are permitted for identifying earthing terminals and terminals for neutral conductors (USA).
– 7.12.2: The requirements for full disconnection do not apply (Japan, USA).
– 7.14: Different tests are used (USA).
– 8.1.1: The test is not necessarily repeated with the 20 N force (USA).
– 8.1.1: Protection against contact with live parts of the lamp cap is not required (USA).
– 8.1.2 and 8.1.3: The test probe 13 and test probe 41 are not used (USA).
– 8.1.5: Built-in appliances, fixed appliances and appliances delivered in separate units are not required to be protected by at least basic insulation before installation (USA).
– Chapter 9: The ability of a motor to start without blowing a quick-acting fuse is required (USA).
– 10.1 and 10.2: Positive limits of 5 % for heating appliances and 10 % for motor-operated appliances are required and in general there are no negative deviations (USA).
– 11.4, 11.5 and 11.6: Heating appliances and heater circuits of combined appliances are operated at rated power input or rated voltage, whichever is the more severe; all other appliances and circuits are operated at rated voltage (USA).
– 11.8, table 3: Temperature rise limits for certain materials are different (USA).
– 13.2: The test circuit and some leakage current limits are different (India, USA).
– 13.3: The values of certain test voltages are different depending on the rated voltage (USA).
– 13.3: A 500 VA test transformer is used (USA).
– 15.1.1 and 15.1.2: The IP system is not used and the tests are different (USA).
– 15.3: The test is conducted with a relative humidity of (88 ± 2) % at a temperature of 32 ℃ ± 2 ℃ (USA).
– 16.2: The test is conducted at nominal supply voltage, and some of the leakage current values are different (USA).
– 16.3: Some test voltages and methods are different (USA).
– 19.1: The circuit protection device is permitted to provide necessary protection (USA).
– 19.2 to 19.4: Generally the tests are conducted at nominal supply voltage or rated power input (USA).
– 19.11: Different tests are carried out to evaluate solid state devices used in protective electronic circuits (USA).
– 19.13: The temperature rise limits of table 9 are not applicable (USA).
– 20.1: A stability test at 15° is not conducted, and an appliance tested in an overturned position is judged under abnormal test criteria (USA).
– 21.1: The impact force is applied by a falling steel ball instead of the spring hammer (USA).
– Chapter 22: The d.c. component in the appliance neutral is limited (Australia).
– 22.1: The IP system is not used and the tests are different (USA).
– 22.2: The second paragraph of this Article dealing with single-phase class I appliances with heating elements cannot be complied with because of the supply system (France and Norway).
– 22.2: Double-pole switches or protective devices are required (Norway).
– 22.2: Disconnection of the neutral is not necessary for all stationary appliances (USA).
– 22.2: The supply cord is not required to be fitted with a plug (Ireland).
– 22.3: The test is different (USA).
– 22.6: This test is not conducted (USA).
– 22.11: Different criteria for snap-on constructions are required (USA).
– 22.12: Positive forms of securement are required (USA).
– 22.14: Sharp edges are evaluated by means of a sharp edge testing device (USA).
– 22.35 and 22.36: Metal parts are generally not required to be separated by double or reinforced insulation (USA).
– 22.44: Appliances may be acceptable based on additional evaluation (USA).
– 22.46: The evaluation of software is different (USA).
– 23.5: Requirements for insulated internal wiring are different (USA).
– 23.7: The requirement only applies to wiring that is accessible when making supply connections (USA).
– 24.1.3: The number of cycles is different and the note does not apply (USA).
– 24.1.4: The number of cycles is different and note 1 does not apply (USA).
– 24.3: The requirement for full disconnection does not apply (USA).
– 25.1: The supply cord is not required to be fitted with a plug (Ireland).
– 25.3: A set of supply leads is not permitted (Norway, Sweden, Denmark, Finland, Netherlands).
– 25.3: The use of a set of terminals for connection of a flexible cord is not generally permitted (USA).
– 25.8: Conductor cross-sectional areas are different (Australia, New Zealand and USA).
– 25.8: 0.5 mm2 supply cords are not allowed for class I appliances (Australia and New Zealand).
– 25.10: Green insulation is also permitted (USA).
– 25.13: Only one separate insulation is required (USA).
– 25.16: A pull of 35 lbs is applied except for small appliances. Generally the torque test is not applied (USA).
– 26.3: The tests only apply to terminals for connection to fixed wiring (USA).
– 26.6: Cross-sectional areas are specified according to American Wire Gauge (AWG) (USA).
– 27.6: The requirement does not apply (USA).
– 28.1: Generally, tests of this type are not required (USA).
– Chapter 29: The requirements for clearances and creepage distances are different (USA).
– 29.1 Different rated impulse voltages are used between 50 V and 150 V (Japan).
– 29.3 The third dashed item of the test specification does not apply (Germany).
– 30.1: The minimum value for the ball-pressure test for parts retaining live parts is 95 ℃ or 40 K higher than the Chapter 11 temperature rise. For enclosures, the minimum value is 75 ℃ or a mould-stress test is conducted at 10 K above the Chapter 11 temperature (USA).
– 30.2.1: An ignition test cannot be used to assure a slow burning rate (USA).
– Annex B, 7.12: Appliances having non-replaceable batteries shall be marked with an appropriate symbol when the batteries have a content of mercury or cadmium exceeding 0.025 % by weight (Sweden and Switzerland).
– Annex B, 21.101: The requirement is different (USA).
– Annex I: The annex applies to motors having a working voltage not exceeding 30 V (USA).
Contents
1 Scope 1
2 Normative References 1
3 Definitions 5
4 General Requirement 11
5 General Conditions for the Tests 11
6 Classification 13
7 Marking and instructions 14
8 Protection against access to live parts 19
9 Starting of motor-operated appliances 20
10 Power input and current 21
11 Heating 22
12 Void 26
13 Leakage current and electric strength at operating temperature 26
14 Transient overvoltages 28
15 Moisture resistance 29
16 Leakage current and electric strength 31
17 Overload protection of transformers and associated circuits 33
18 Endurance 33
19 Abnormal operation 33
20 Stability and mechanical hazards 40
21 Mechanical strength 41
22 Construction 42
23 Internal wiring 50
24 Components 52
25 Supply connection and external flexible cords 54
26 Terminals for external conductors 60
27 Provision for earthing 63
28 Screws and connections 64
29 Clearances, creepage distances and solid insulation 67
30 Resistance to heat and fire 72
31 Resistance to rusting 75
32 Radiation, toxicity and similar hazards 75
Annex A (informative) Routine tests 81
Annex B (normative) Appliances powered by rechargeable batteries 83
Annex C (normative) Ageing test on motors 85
Annex D (Normative) Thermal motor protectors 86
Annex E (Normative) Needle flame test 87
Annex F (Normative) Capacitors 88
Annex G (normative) Safety isolating transformers 90
Annex H (normative) Switches 91
Annex I (normative) Motors having basic insulation that is inadequate for the rated voltage of the appliance 92
Annex J (normative) Coated printed circuit boards 94
Annex K (normative) Overvoltage categories 95
Annex L (informative) Guidance for the measurement of clearances and creepage distances 96
Annex N (normative) Proof tracking test 99
Annex O (informative) Selection and sequence of the tests of Chapter 30 100
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits 103
Annex R (normative) Software evaluation 105
Introduction
It has been assumed in the drafting of this international standard that the execution of its provisions is entrusted to appropriately qualified and experienced persons.
This standard recognizes the internationally accepted level of protection against hazards such as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal use taking into account the manufacturer's instructions. It also covers abnormal situations that can be expected in practice and takes into account the way in which electromagnetic phenomena can affect the safe operation of appliances.
This standard takes into account the requirements of GB 16895 as far as possible so that there is compatibility with the wiring rules when the appliance is connected to the supply mains. However, national wiring rules may differ.
If the functions of an appliance are covered by different parts 2 of GB 4706, the relevant part 2 is applied to each function separately, as far as is reasonable. If applicable, the influence of one function on the other is taken into account.
Note 1: Throughout this publication, when “Part 2” is mentioned, it refers to the relevant part of GB 4706.
This standard is a product family standard dealing with the safety of appliances and takes precedence over horizontal and generic standards covering the same subject.
Individual countries may wish to consider the application of the standard, as far as is reasonable, to appliances not mentioned in a part 2, and to appliances designed on new principles.
An appliance that complies with the text of this standard will not necessarily be considered to comply with the safety principles of the standard if, when examined and tested, it is found to have other features which impair the level of safety covered by these requirements.
An appliance employing materials or having forms of construction differing from those detailed in the requirements of this standard may be examined and tested according to the intent of the requirements and, if found to be substantially equivalent, may be considered to comply with the standard.
Note 2: Standards dealing with non-safety aspects of household appliances are
– IEC standards published by TC 59 concerning methods of measuring performance;
– CISPR 11, CISPR 14-1, IEC 61000-3-2 and IEC 61000-3-3 concerning electromagnetic emissions;
– CISPR 14-2 concerning electromagnetic immunity.
Household and Similar Electrical Appliances – Safety –
Part 1: General Requirements
1 Scope
This part deals with the safety of electrical appliances for household and similar purposes, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.
Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard.
Note 1: Examples of such appliances are catering equipment, cleaning appliances for industrial and commercial use, and appliances for hairdressers.
As far as is practicable, this standard deals with the common hazards presented by appliances that are encountered by all persons in and around the home. However, in general, it does not take into account – the use of appliances by young children or infirm persons without supervision, – playing with the appliance by young children.
Note 2: Attention is drawn to the fact that – for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; – in many countries additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities and similar authorities.
Note 3: This standard does not apply to
– appliances intended exclusively for industrial purposes;
– appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas);
– audio, video and similar electronic apparatus (GB 8898);
– appliances for medical purposes (GB 9706.1);
– hand-held motor-operated electric tools (GB 3883.1);
– personal computers and similar equipment (GB 4943);
– transportable motor-operated electric tools (GB 13960).
2 Normative References
The following standards contain provisions which, through reference in GB 4706, constitute provisions of this part. For dated reference, subsequent amendments to excluding correction to, or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to these specifications are encouraged to research whether the latest editions these labels are applied or not. For undated references, the latest edition of the normative document is applicable to this part.
GB 1406 Types and dimensions of Edison screw lamp caps (GB 1406-2001, eqv IEC 60061-1: 1999)
GB/T 1804 General tolerances - Tolerances for linear and angular dimensions without individual tolerance indications (GB/T 1804-2000, eqv ISO 2768-1: 1989)
GB/T 2423.2 Environmental testing - Part 2: Test methods - Tests B: Dry heat (GB/T 2423.2-2001, idt IEC 60068-2-2: 1974)
GB/T 2423.8 Environmental testing for electric and electronic products Part 2: Test methods Test Ed: Free fall (GB/T 2423.8-1995, idt IEC 60068-2-32: 1990)
GB 3667 A.C. motor capacitors (GB 3667-1997, idt IEC 60252: 1992)
GB 4208 Degrees of protection provided by enclosure (IP code) (GB 4208-1993, eqv IEC 60529: 1989)
GB/T 5169.5-1997 Fire hazard testing for electric and electronic products-Part 2: Test methods-Section 2: Needle-flame test (idt IEC 60695-2-2: 1991)
GB/T 5169.11 Fire hazard testing for electric and electronic products-Test methods-Glow-wire end-product test and guidance (GB/T 5169.11-1997, idt IEC 60695-2-11: 1994)
GB/T 5169.12 Fire hazard testing for electric and electronic products-Test methods-Glow -wire flammability test on materials (GB/T 5169.12-1999, idt IEC 60695-2-12: 1994)
GB/T 5169.13 Fire hazard testing for electric and electronic products-Test methods-Glow-wire ignitability test on materials (GB/T 5169.13-1999, idt IEC 60695-2-13: 1994)
GB/T 5169.16 Fire hazard testing for electric and electronic products--Part 16:50 W horizontal and vertical flame test methods (GB/T 5169.16-2002, IEC 60695-11-10: 1999, IDT)
GB/T 7153 Directly heated positive step-function temperature coefficient thermistors -- Part 1:Generic specification (GB/T 7153-2002, IEC 60738-1: 1998, IDT)
GB/T 12113-2003 Methods of measurement of touch current and protective conductor current (IEC 60990: 1999, IDT)
GB/T 14472-1998 Fixed capacitors for use in electronic equipment --Part 14: Sectional specification Fixed capacitors for electromagnetic interference suppression and connection to the supply mains (idt IEC 60384-14: 1993)
GB/T 16935.1-1997 Insulation coordination for equipment within low-voltage systems Part 1: Principles, requirements and tests (idt IEC 60664-1: 1992) IEC 60664-1
Amendment 1 (2000)
Amendment 2 (2002) )
GB 17465.1 Appliance couplers for household and similar general purposes -- Part 1: General requirements (GB 17465.1-1998, eqv IEC 60320-1: 1994)
GB 17465.2 Appliance couplers for household and similar general purposes -- Part 2: Interconnection couplers for household and similar equipment (GB 17465.2-1998, eqv IEC 60320-2-2: 1990)
GB/T 17626.2 Electromagnetic compatibility--Testing and measurement techniques--Electrostatic discharge immunity test (GB/T 17626.2-1998, idt IEC 61000-4-2: 1995)
GB/T 17626.3 Electromagnetic compatibility--Testing and measurement techniques-- Radiated, radio-frequency, electromagnetic field immunity test (GB/T 17626.3-1998, idt IEC 61000-4-3: 1995)
GB/T 17626.4 Electromagnetic compatibility-- Testing and measurement techniques --Electrical fast transient/burst immunity test (GB/T 17626.4-1998, idt IEC 61000-4-4: 1995)
GB/T 17626.5 Electromagnetic compatibility--Testing and measurement techniques--Surge immunity test (GB/T 17626.5-1999, idt IEC 61000-4-5: 1995)
GB/T 17626.6 Electromagnetic compatibility --Testing and measurement techniques --Immunity to conducted disturbances, induced by radio-frequency fields (GB/T 17626.6-1998, idt IEC 61000-4-6: 1996)
GB/T 17626.11-1999 Electromagnetic compatibility Testing and measurement techniques Voltage dips, short interruptions and voltage variations immunity tests (idt IEC 61000-4-11: 1994)
IEC 61000-4-11 amendment 1 (2000) )
GB/T 17627.1 High-voltage test techniques for low-voltage equipment Part 1: Definitions, test and procedure requirements (GB/T 17627.1-1998, eqv IEC 61180-1: 1992)
GB/T 17627.2 High-voltage test techniques for low-voltage equipment Part 2: Measuring system and test equipment (GB/T 17627.2-1998, eqv IEC 61180-2: 1994)
GB 17935 Edison screw lamp holders (GB 17935-1999, idt IEC 60238: 1996)
IEC 60068-2-75 Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests
IEC/TR3 60083 Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC )
IEC 60085 Electrical insulation – Thermal evaluation and designation
IEC 60112: 2003 Method for the Determination of the Proof and the Comparative Tracking Indices of Solid Insulating Materials
IEC 60127 (all parts) miniature fuses
IEC 60227 (all parts) Polyvinyl Chloride Insulated Cables of Rated Voltages up to and Including 450/750 V IEC 60245 (all parts) Rubber insulated cables – Rated voltages up to and including 450/750 V
IEC 60249-2-4: 1987 Base materials for printed circuits. Part 2: Specifications. Specification No. 4: Epoxide woven glass fabric copper-clad laminated sheet, general purpose grade
Amendment 1 (1989)
Amendment 2 (1992)
Amendment 3 (1993)
Amendment 4 (1994)
Amendment 5 (2000)
IEC 60249-2-5: 1987 Base Materials for Printed Circuits Part 2: Specifications Specification No. 5: Epoxide Woven Glass Fabric Copper-Clad Laminated Sheet of Defined Flammability (Vertical Burning Test)
Amendment 1 (1989)
Amendment 2 (1992)
Amendment 3 (1993)
Amendment 4 (1994)
Amendment 5 (2000)
IEC 60320-2-3 Appliance coupler for household and similar general purposes - Part 2-3: Appliance coupler with a degree of protection higher than IPX0
IEC 60417-DB: 2002 Graphical symbols for use on equipment
IEC 60598-1: 2003 Luminaires - Part 1: General requirements and tests
IEC 60664-3: 1992 Insulation coordination for equipment within low-voltage systems – Part 3: Use of coating, potting or moulding for protection against pollution
IEC 60695-10-2 Fire hazard testing - Part 10-2: Abnormal heat - Ball pressure test
IEC 60730-1: 1999 Automatic electrical controls for household and similar use - Part 1: General requirements
IEC 60730-2-8: 2000 Automatic electrical controls for household and similar use - Part 2-8: Particular requirements for electrically operated water valves, including mechanical requirements
IEC 60906-1 IEC system of plugs and socket-outlets for household and similar purposes - Part 1: Plugs and socket-outlets 16A 250V a.c.
IEC 60999-1: 1999 Connecting Devices - Electrical Copper Conductors - Safety Requirements for Screw-Type and Screwless-Type Clamping Units - Part 1: General Requirements and Particular Requirements for Clamping Units for Conductors from 0.2 mm Squared up to 35 mm Squared
IEC 61000-4-13 Electromagnetic compatibility (EMC) - Part 4-13: Testing and measurement techniques - Harmonics and interharmonics including mains signalling at a.c. power port, low frequency immunity tests
IEC 61032: 1997 Protection of persons and equipment by enclsures-probes for verification
IEC 61058-1: 2000
IEC 61058-1 amendment 1 (2001) )
IEC 61558-1: 1997 Safety of power transformers, power supplies, reactors and similar products – Part 1: General requirements and tests
IEC 61558-2-6: 1997 Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V - Part 2-6: Particular requirements and tests for safety isolating transformers and power supply units incorporating safety isolating transformers
IEC 61770 Electric appliances connected to the water mains - Avoidance of backsiphonage and failure of hose-sets
ISO 7000 Graphical symbols for use on equipment -- Index and synopsis
ISO 9772: 2001 Cellular plastics -- Determination of horizontal burning characteristics of small specimens subjected to a small flame
Note: if there are differences between the national standard and the referenced IEC standards, the IEC standards are referenced for concrete analysis.
3 Definitions
An Index of the defined terms is provided at the end of this publication.
3.1 When the terms “voltage” and “current” are used, they are r.m.s. values, unless otherwise specified.
3.1.1 Rated voltage
Voltage assigned to the appliance by the manufacturer
3.1.2 Rated voltage range
Voltage range assigned to the appliance by the manufacturer, expressed by its lower and upper limits
3.1.3 Working voltage maximum
Voltage to which the part under consideration is subjected when the appliance is supplied at its rated voltage and operating under normal operation.
Note 1: The different positions of controls and switching devices are taken into account.
Note 2: Working voltage takes into account resonant voltages.
Note 3: When deducing the working voltage, the effect of transient voltages is ignored.
3.1.4 Rated power input
Power input assigned to the appliance by the manufacturer
3.1.5 Rated power input range
Power input range assigned to the appliance by the manufacturer, expressed by its lower and upper limits
3.1.6 Rated current
Current assigned to the appliance by the manufacturer.
Note: If no current is assigned to the appliance, the rated current is
– For heating appliances, the current calculated from the rated power input and the rated voltage;
– For motor-operated appliances and combined appliances, the current measured when the appliance is supplied at rated voltage and operated under normal operation.
3.1.7 Rated frequency
Frequency assigned to the appliance by the manufacturer.
3.1.8 Rated frequency range
Frequency range assigned to the appliance by the manufacturer, expressed by its lower and upper limits.
3.1.9 Normal operation
Conditions under which the appliance is operated in normal use when it is connected to the supply mains.
3.1.10 Rated impulse voltage
Voltage derived from the rated voltage and the overvoltage category of the appliance, characterizing the specified withstand capability of its insulation against transient over-voltages.
3.1.11 Dangerous malfunction
Unintended operation of the appliance that may impair safety.
3.2
3.2.1 Detachable cord
Flexible cord, for supply or interconnection, intended to be connected to the appliance by means of a suitable appliance coupler.
3.2.2 Interconnection cord
External flexible cord provided as part of a complete appliance for purposes other than connection to the supply mains.
Note: A remote hand-held switching device, an external interconnection between two parts of an appliance and a cord connecting an accessory to the appliance or to a separate signalling circuit are examples of interconnection cords.
3.2.3 Supply cord
Flexible cord, for supply purposes, that is fixed to the appliance.
3.2.4 Type X attachment
Method of attachment of the supply cord such that it can easily be replaced.
Note: The supply cord may be specially prepared and only available from the manufacturer or its service agent. A specially prepared cord may include a part of the appliance.
3.2.5 Type Y attachment
Method of attachment of the supply cord such that any replacement is intended to be made by the manufacturer, its service agent or similar qualified person
3.2.6 type Z attachment
method of attachment of the supply cord such that it cannot be replaced without breaking or destroying the appliance
3.2.7 Supply leads
Set of wires intended for connecting the appliance to fixed wiring and accommodated in a compartment within or attached to the appliance
3.3
3.3.1 Basic insulation
Insulation applied to live parts to provide basic protection against electric shock.
3.3.2 Supplementary insulation
Independent insulation applied in addition to basic insulation, in order to provide protection against electric shock in the event of a failure of basic insulation.
3.3.3 Double insulation
Insulation system comprising both basic insulation and supplementary insulation.
3.3.4 Reinforced insulation
Single insulation applied to live parts, that provides a degree of protection against electric shock equivalent to double insulation under the conditions specified in this standard.
Note: It is not implied that the insulation is one homogeneous piece. The insulation may comprise several layers which cannot be tested singly as supplementary insulation or basic insulation.
3.3.5 Functional insulation
insulation between conductive parts of different potential which is necessary only for the proper functioning of the appliance.
3.3.6 Protective impedance
Impedance connected between live parts and accessible conductive parts of class II constructions so that the current, in normal use and under likely fault conditions in the appliance, is limited to a safe value.
3.3.7 Class 0 appliance
Appliance in which protection against electric shock relies upon basic insulation only, there being no means for the connection of conductive accessible parts, if any, to the protective conductor in the fixed wiring of the installation, reliance in the event of a failure of the basic insulation being placed upon the environment
Note: Class 0 appliances have either an enclosure of insulating material which may form a part or the whole of the basic insulation, or a metal enclosure which is separated from live parts by an appropriate insulation. If an appliance with an enclosure of insulating material has provision for earthing internal parts, it is considered to be a class I appliance or class 0I appliance.
3.3.8 Class 0I appliance
Appliance having at least basic insulation throughout and incorporating an earthing terminal but having a supply cord without earthing conductor and a plug without earthing contact 60335-1
3.3.9 Class I appliance
Appliance in which protection against electric shock does not rely on basic insulation only but which includes an additional safety precaution, in that conductive accessible parts are connected to the protective earthing conductor in the fixed wiring of the installation in such a way that conductive accessible parts cannot become live in the event of a failure of the basic insulation Note: This provision includes a protective earthing conductor in the supply cord.
3.3.10 Class II appliance
Appliance in which protection against electric shock does not rely on basic insulation only but in which additional safety precautions are provided, such as double insulation or reinforced insulation, there being no provision for protective earthing or reliance upon installation conditions
Note 1: Such an appliance may be of one of the following types:
– an appliance having a durable and substantially continuous enclosure of insulating material which envelops all metal parts, with the exception of small parts, such as nameplates, screws and rivets, which are isolated from live parts by insulation at least equivalent to reinforced insulation; such an appliance is called an insulation-encased class II appliance;
– an appliance having a substantially continuous metal enclosure, in which double insulation or reinforced insulation is used throughout; such an appliance is called a metal-encased class II appliance;
– an appliance which is a combination of an insulation-encased class II appliance and a metal-encased class II appliance.
Note 2: The enclosure of an insulation-encased class II appliance may form a part or the whole of the supplementary insulation or of the reinforced insulation.
Note 3: If an appliance with double insulation or reinforced insulation throughout has provision for earthing, it is considered to be a class I appliance or a class 0I appliance.
3.3.11 Class II construction
Part of an appliance for which protection against electric shock relies upon double insulation or reinforced insulation
3.3.12 Class III appliance
Appliance in which protection against electric shock relies on supply at safety extra-low voltage and in which voltages higher than those of safety extra-low voltage are not generated
3.3.13 class III construction
part of an appliance for which protection against electric shock relies upon safety extra-low voltage and in which voltages higher than those of safety extra-low voltage are not generated 3.3.14 Clearance
Shortest distance in air between two conductive parts or between a conductive part and the accessible surface
3.3.15 Creepage distance
Shortest distance along the surface of insulation between two conductive parts or between a conductive part and the accessible surface
3.4
3.4.1 Extra-low voltage
Voltage supplied from a source within the appliance that does not exceed 50 V between conductors and between conductors and earth when the appliance is supplied at rated voltage
3.4.2 Safety extra-low voltage
Voltage not exceeding 42 V between conductors and between conductors and earth, the no-load voltage not exceeding 50 V
When safety extra-low voltage is obtained from the supply mains, it is to be through a safety isolating transformer or a convertor with separate windings, the insulation of which complies with double insulation or reinforced insulation requirements.
Note 1: The voltage limits specified are based on the assumption that the safety isolating transformer is supplied at its rated voltage.
Note 2: Safety extra-low voltage is also known as SELV.
3.4.3 Safety isolating transformer
Transformer, the input winding of which is electrically separated from the output winding by an insulation at least equivalent to double insulation or reinforced insulation, that is intended to supply an appliance or circuit at safety extra-low voltage
3.4.4 Protective extra-low voltage circuit
Earthed circuit operating at safety extra-low voltage which is separated from other circuits by basic insulation and protective screening, double insulation or reinforced insulation
Note 1: Protective screening is the separation of circuits from live parts by means of an earthed screen.
Note 2: A protective extra-low voltage circuit is also known as a PELV circuit.
3.5
3.5.1 Portable appliance
Appliance that is intended to be moved while in operation or an appliance, other than a fixed appliance, having a mass less than 18 kg
3.5.2 Hand-held appliance
Portable appliance intended to be held in the hand during normal use
3.5.3 Stationary appliance
Fixed appliance or an appliance which is not a portable appliance
3.5.4 Fixed appliance
Appliance that is intended to be used while fastened to a support or while secured in a specific location
3.5.5 Built-in appliance
Fixed appliance intended to be installed in a cabinet, in a prepared recess in a wall or in a similar location
3.5.6 Heating appliance
Appliance incorporating heating elements but without any motor
3.5.7 Motor-operated appliance
Appliance incorporating motors but without any heating element
Note: Magnetically driven appliances are considered to be motor-operated appliances.
3.5.8 Combined appliance
Appliance incorporating heating elements and motors
3.6
3.6.1 Non-detachable part
Part that can only be removed or opened with the aid of a tool or a part that fulfills the test of 22.11
3.6.2 Detachable part
Part that can be removed without the aid of a tool, a part that is removed in accordance with the instructions for use, even if a tool is needed for removal, or a part that does not fulfill the test of 22.11.
Note 1: If for installation purposes a part has to be removed, this part is not considered to be detachable even if the instructions state that it is to be removed.
Note 2: Components that can be removed without the aid of a tool are considered to be detachable parts.
Note 3: A part that can be opened is considered to be a part that can be removed.
3.6.3 Accessible part
Part or surface that can be touched by means of test probe B of IEC 61032, and if the part or surface is metal, any conductive part connected to it
3.6.4 Live part
Conductor or conductive part intended to be energized in normal use, including a neutral conductor but, by convention, not a PEN conductor
Note 1: Parts, accessible or not, complying with 8.1.4 are not considered to be live parts.
Note 2: A PEN conductor is a protective earthed neutral conductor combining the functions of both a protective conductor and a neutral conductor.
3.6.5 Tool
Screwdriver, coin or any other object that may be used to operate a screw or similar fixing means
3.7
3.7.1 Thermostat
Temperature-sensing device, the operating temperature of which may be either fixed or adjustable and which during normal operation keeps the temperature of the controlled part between certain limits by automatically opening and closing a circuit
3.7.2 Temperature limiter
Temperature-sensing device, the operating temperature of which may be either fixed or adjustable and which during normal operation operates by opening or closing a circuit when the temperature of the controlled part reaches a predetermined value
Note: It does not make the reverse operation during the normal duty cycle of the appliance. It may or may not require manual resetting.
3.7.3 Thermal cut-out
Device which during abnormal operation limits the temperature of the controlled part by automatically opening the circuit, or by reducing the current, and is constructed so that its setting cannot be altered by the user
3.7.4 Self-resetting thermal cut-out
Thermal cut-out that automatically restores the current after the relevant part of the appliance has cooled down sufficiently
3.7.5 Non-self-resetting thermal cut-out
Thermal cut-out that requires a manual operation for resetting, or replacement of a part, in order to restore the current
Note: Manual operation includes disconnection of the appliance from the supply mains.
3.7.6 Protective device
Device, the operation of which prevents a hazardous situation under abnormal operation conditions
3.7.7 Thermal link thermal cut-out which operates only once and requires partial or complete replacement
3.8
3.8.1 All-pole disconnection
Disconnection of both supply conductors by a single initiating action or, for three-phase appliances, disconnection of the three supply conductors by a single initiating action
Note: For three-phase appliances, the neutral conductor is not considered to be a supply conductor.
3.8.2 Off position
Stable position of a switching device in which the circuit controlled by the switch is disconnected from its supply or, for electronic disconnection, the circuit is de-energized
Note: The off position does not imply an all-pole disconnection.
3.8.3 Visibly glowing heating element
Heating element that is partly or completely visible from the outside of the appliance and has a temperature of at least 650 ℃ when the appliance has been operated under normal operation at rated power input until steady conditions have been established
3.8.4 PTC heating element
Element intended for heating consisting mainly of positive temperature coefficient resistors that are thermally sensitive and have a rapid non-linear increase in resistance when the temperature is raised through a particular range
3.8.5 User maintenance
Any maintenance operation stated in the instructions for use, or marked on the appliance, that the user is intended to perform
3.9
3.9.1 Electronic component
Part in which conduction is achieved principally by electrons moving through a vacuum, gas or semiconductor
Note: Neon indicators are not considered to be electronic components.
3.9.2 Electronic circuit
Circuit incorporating at least one electronic component
3.9.3 Protective electronic circuit
Electronic circuit that prevents a hazardous situation under abnormal operating conditions
Note: Parts of the circuit may also be used for functional purposes.
3.9.4 Software class B
Software that includes code intended to prevent hazards if a fault, other than a software fault, occurs in the appliance
3.9.5 Software class C
Software that includes code intended to prevent hazards without the use of other protective devices.
4 General Requirement
Appliances shall be constructed so that in normal use they function safely so as to cause no danger to persons or surroundings, even in the event of carelessness that may occur in normal use.
In general this principle is achieved by fulfilling the relevant requirements specified in this standard and compliance is checked by carrying out all the relevant tests.
5 General Conditions for the Tests
Unless otherwise specified, the tests are carried out in accordance with this Chapter.
5.1 Tests according to this standard are type tests.
Note: Routine tests are described in annex A.
5.2 The tests are carried out on a single appliance that shall withstand all the relevant tests.
However, the tests of Chapters 20, 22 (except 22.11 and 22.18) to 26, 28, 30 and 31 may be carried out on separate appliances. The test of 22.3 is carried out on a new appliance.
Note 1: Additional samples may be required if the appliance has to be tested under different conditions, for example if it can be supplied with different voltages.
If an intentionally weak part becomes open circuit during the tests of Chapter 19, an additional appliance may be needed.
The testing of components may require the submission of additional samples of these components.
If the test of annex C has to be carried out, six samples of the motor are needed.
If the test of annex D has to be carried out, an additional appliance may be used.
If the tests of annex G are carried out, four additional transformers are needed.
If the tests of annex H are carried out, three switches or three additional appliances are needed.
Note 2: The cumulative stress resulting from successive tests on electronic circuits is to be avoided. It may be necessary to replace components or to use additional samples. The number of additional samples should be kept to a minimum by an evaluation of the relevant electronic circuits.
Note 3: If an appliance has to be dismantled in order to carry out a test, care is to be taken to insure that it is reassembled as originally supplied. In case of doubt, subsequent tests may be carried out on a separate sample.
5.3 The tests are carried out in the order of the Chapters. However, the test of 22.11 on the appliance at room temperature is carried out before the tests of Chapter 8. The tests of Chapter 14 and 21.2 and 22.24 are carried out after the tests of Chapter 29.
If it is evident from the construction of the appliance that a particular test is not applicable, the test is not carried out.
Contents of GB 4706.1-2005
1 Scope
2 Normative References
3 Definitions
4 General Requirement
5 General Conditions for the Tests
6 Classification
7 Marking and instructions
8 Protection against access to live parts
9 Starting of motor-operated appliances
10 Power input and current
11 Heating
12 Void
13 Leakage current and electric strength at operating temperature
14 Transient overvoltages
15 Moisture resistance
16 Leakage current and electric strength
17 Overload protection of transformers and associated circuits
18 Endurance
19 Abnormal operation
20 Stability and mechanical hazards
21 Mechanical strength
22 Construction
23 Internal wiring
24 Components
25 Supply connection and external flexible cords
26 Terminals for external conductors
27 Provision for earthing
28 Screws and connections
29 Clearances, creepage distances and solid insulation
30 Resistance to heat and fire
31 Resistance to rusting
32 Radiation, toxicity and similar hazards
Annex A (informative) Routine tests
Annex B (normative) Appliances powered by rechargeable batteries
Annex C (normative) Ageing test on motors
Annex D (Normative) Thermal motor protectors
Annex E (Normative) Needle flame test
Annex F (Normative) Capacitors
Annex G (normative) Safety isolating transformers
Annex H (normative) Switches
Annex I (normative) Motors having basic insulation that is inadequate for the rated voltage of the appliance
Annex J (normative) Coated printed circuit boards
Annex K (normative) Overvoltage categories
Annex L (informative) Guidance for the measurement of clearances and creepage distances
Annex N (normative) Proof tracking test
Annex O (informative) Selection and sequence of the tests of Chapter
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits
Annex R (normative) Software evaluation
