1 Scope
This Part deals with the safety of hand-held motor-operated or magnetically driven electric tools, the rated voltage of the tools being not more than 250 V for single-phase a.c. or d.c. tools, and 440 V for three-phase a.c. tools.
So far as is practicable, this Part deals with the common hazards presented by hand-held tools which are encountered by all persons in the normal use and reasonably foreseeable misuse of the tools.
Tools with an electric heating element are within the scope of this Part. They should also comply with relevant parts of GB 4706.
Requirements for motors not isolated from the supply, and having basic insulation not designed for the rated voltage of the tools, are given in Appendix B. Requirements for rechargeable battery-powered motor-operated or magnetically driven tools and the battery packs for such tools are given in Appendix K. Those for such tools that are also operated and/or charged directly from the mains or a non-isolated source are given in Appendix L.
Hand-held electric tools, hereinafter referred to as tools, which can be mounted on a support or working stand for use as fixed tools without any alteration of the tool itself, are within the scope of this Part. Requirements for such supports or working stands are given in Appendix M.
This Part does not apply to:
— Hand-held tools intended to be used in the presence of explosive atmosphere (dust, vapour or gas);
— Hand-held tools used for preparing and processing food;
— Hand-held tools for medical purposes (IEC 60601);
— Heating tools which are covered by GB 4706.41.
For hand-held tools intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary.
For hand-held tools intended to be used in tropical countries, special requirements may be necessary.
Note: Attention is drawn to the fact that 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, etc.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Part of GB 3883. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
Foreword IV
Introduction VII
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 General Conditions for the Tests
6 (Void)
7 Classification
8 Marking and Instructions
9 Protection Against Access to Live Parts
10 Starting
11 Input and Current
12 Heating
13 Leakage Current
14 Moisture Resistance
15 Electric Strength
16 Overload Protection of Transformers and Associated Circuits
17 Endurance
18 Abnormal Operation
19 Mechanical Hazards
20 Mechanical Strength
21 Construction
22 Internal Wiring
23 Components
24 Supply Connection and External Flexible Cords
25 Terminals for External Conductors
26 Provision for Earthing
27 Screws and Connections
28 Creepage Distances, Clearances and Distances Through Insulation
29 Resistance to Heat, Fire and Tracking
30 Resistance to Rusting
31 Radiation, Toxicity and Similar Hazards
Appendix A (Normative) Measurement of Creepage Distances and Clearances
Appendix B (Normative) Motors not Isolated from the Supply Mains and Having Basic Insulation not Designed for the Rated Voltage of the Tool
Appendix C (Void)
Appendix D (Void)
Appendix E
Appendix F (Normative) Needle-flame Test
Appendix G (Normative) Proof Tracking Test
Appendix H (Void)
Appendix I (Normative) Switches
Appendix J (Informative) Selection and Sequence of the Tests of Chapter 29
Appendix K (Normative) Battery tools and Battery Packs
Appendix L (Normative) Battery Tools and Battery Packs Provided with Mains Connection or Non-isolated Sources
Appendix M (Normative) Safety of Working Stands for Operation with Hand-held Motor-operated Electric Tools
Appendix N (Informative) Rules for Routine Tests
Bibliography
Figure 1 Standard Test Finger
Figure 2 Test Pin
Figure 3 Diagram for Leakage Current Measurement at Operating Temperature for Single-phase Connection and Three-phase Tools Suitable for Single-phase Supply
Figure 4 Diagram for Leakage Current Measurement at Operating Temperature for Three-phase Connection
Figure 5 Ball-pressure Test Apparatus
Figure 6 Schematic Representation of Cord Anchorages
Figure 7 Test Fingernail
Figure 8 Examples of Parts of Earthing Terminals
Figure 9 Flexing Test Apparatus
Figure 10 Circuit for Measuring Leakage Currents
Figure A.1a Clearance Gap for Parallel Sided and V-shaped Groove
Figure A.1b Clearance Gap for Rib and Uncemented Joint with Groove
Figure A.1c Clearance Gap for Uncemented Joint and Diverging-sided Groove
Figure A.1d Clearance Gap between Wall and Screw
Figure B.1 Simulation of Defects
Figure K.1 Measurement of Clearances
Figure L.1 Measurement of Clearances
Table 1 Maximum Normal Temperature Rises
Table 2 Test Voltages
Table 3 Maximum Winding Temperature
Table 4 Impact Energies
Table 5 Test Torques
Table 6 Minimum Cross-sectional Area of Supply Cord
Table 7 Pull and Torque Value
Table 8 Nominal Cross-sectional Area of Conductors
Table 9 Torque for Testing Screws and Nuts
Table 10 Minimum Creepage Distances and Clearances
Table K.1 Maximum Normal temperature Rises for Battery Tools
Table K.2 Minimum Creepage Distances and Clearances between Parts of Opposite Polarity
Table L.1 Minimum Creepage Distances and Clearances between Parts of Opposite Polarity
Table N.1 Test Voltages for the Electric Strength Test
1 Scope
This Part deals with the safety of hand-held motor-operated or magnetically driven electric tools, the rated voltage of the tools being not more than 250 V for single-phase a.c. or d.c. tools, and 440 V for three-phase a.c. tools.
So far as is practicable, this Part deals with the common hazards presented by hand-held tools which are encountered by all persons in the normal use and reasonably foreseeable misuse of the tools.
Tools with an electric heating element are within the scope of this Part. They should also comply with relevant parts of GB 4706.
Requirements for motors not isolated from the supply, and having basic insulation not designed for the rated voltage of the tools, are given in Appendix B. Requirements for rechargeable battery-powered motor-operated or magnetically driven tools and the battery packs for such tools are given in Appendix K. Those for such tools that are also operated and/or charged directly from the mains or a non-isolated source are given in Appendix L.
Hand-held electric tools, hereinafter referred to as tools, which can be mounted on a support or working stand for use as fixed tools without any alteration of the tool itself, are within the scope of this Part. Requirements for such supports or working stands are given in Appendix M.
This Part does not apply to:
— Hand-held tools intended to be used in the presence of explosive atmosphere (dust, vapour or gas);
— Hand-held tools used for preparing and processing food;
— Hand-held tools for medical purposes (IEC 60601);
— Heating tools which are covered by GB 4706.41.
For hand-held tools intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary.
For hand-held tools intended to be used in tropical countries, special requirements may be necessary.
Note: Attention is drawn to the fact that 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, etc.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this Part of GB 3883. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this Part are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
Contents of GB 3883.1-2008
Foreword IV
Introduction VII
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 General Conditions for the Tests
6 (Void)
7 Classification
8 Marking and Instructions
9 Protection Against Access to Live Parts
10 Starting
11 Input and Current
12 Heating
13 Leakage Current
14 Moisture Resistance
15 Electric Strength
16 Overload Protection of Transformers and Associated Circuits
17 Endurance
18 Abnormal Operation
19 Mechanical Hazards
20 Mechanical Strength
21 Construction
22 Internal Wiring
23 Components
24 Supply Connection and External Flexible Cords
25 Terminals for External Conductors
26 Provision for Earthing
27 Screws and Connections
28 Creepage Distances, Clearances and Distances Through Insulation
29 Resistance to Heat, Fire and Tracking
30 Resistance to Rusting
31 Radiation, Toxicity and Similar Hazards
Appendix A (Normative) Measurement of Creepage Distances and Clearances
Appendix B (Normative) Motors not Isolated from the Supply Mains and Having Basic Insulation not Designed for the Rated Voltage of the Tool
Appendix C (Void)
Appendix D (Void)
Appendix E
Appendix F (Normative) Needle-flame Test
Appendix G (Normative) Proof Tracking Test
Appendix H (Void)
Appendix I (Normative) Switches
Appendix J (Informative) Selection and Sequence of the Tests of Chapter 29
Appendix K (Normative) Battery tools and Battery Packs
Appendix L (Normative) Battery Tools and Battery Packs Provided with Mains Connection or Non-isolated Sources
Appendix M (Normative) Safety of Working Stands for Operation with Hand-held Motor-operated Electric Tools
Appendix N (Informative) Rules for Routine Tests
Bibliography
Figure 1 Standard Test Finger
Figure 2 Test Pin
Figure 3 Diagram for Leakage Current Measurement at Operating Temperature for Single-phase Connection and Three-phase Tools Suitable for Single-phase Supply
Figure 4 Diagram for Leakage Current Measurement at Operating Temperature for Three-phase Connection
Figure 5 Ball-pressure Test Apparatus
Figure 6 Schematic Representation of Cord Anchorages
Figure 7 Test Fingernail
Figure 8 Examples of Parts of Earthing Terminals
Figure 9 Flexing Test Apparatus
Figure 10 Circuit for Measuring Leakage Currents
Figure A.1a Clearance Gap for Parallel Sided and V-shaped Groove
Figure A.1b Clearance Gap for Rib and Uncemented Joint with Groove
Figure A.1c Clearance Gap for Uncemented Joint and Diverging-sided Groove
Figure A.1d Clearance Gap between Wall and Screw
Figure B.1 Simulation of Defects
Figure K.1 Measurement of Clearances
Figure L.1 Measurement of Clearances
Table 1 Maximum Normal Temperature Rises
Table 2 Test Voltages
Table 3 Maximum Winding Temperature
Table 4 Impact Energies
Table 5 Test Torques
Table 6 Minimum Cross-sectional Area of Supply Cord
Table 7 Pull and Torque Value
Table 8 Nominal Cross-sectional Area of Conductors
Table 9 Torque for Testing Screws and Nuts
Table 10 Minimum Creepage Distances and Clearances
Table K.1 Maximum Normal temperature Rises for Battery Tools
Table K.2 Minimum Creepage Distances and Clearances between Parts of Opposite Polarity
Table L.1 Minimum Creepage Distances and Clearances between Parts of Opposite Polarity
Table N.1 Test Voltages for the Electric Strength Test
