Standard No.:	GB/T 4706.21-2024
English Name:	Safety of household and similar electrical appliances - Part 21：Particular requirements for microwave ovens, including combination microwave ovens
Chinese Name:	家用和类似用途电器的安全 第21部分：微波炉,包括组合型微波炉的特殊要求
Professional Classification:	GB    National Standard
Issued on:	2024-7-24
Implemented on:	2026-8-1
Status:	to be valid
Superseding:	GB 4706.21-2008 Household and similar electrical appliances - Safety - Particular requirements for microwave ovens including combination microwave ovens
Language:	English
File Format:	PDF
Word Count:	19000 words
Price(USD):	570.0
Delivery:	via email in 1~5 business day

Safety of household and similar electrical appliances - Part 21: Particular requirements for microwave ovens, including combination microwave ovens 1 Scope This clause of 4706.1-2024 is replaced by the following. This document specifies the safety requirements for household and similar microwave ovens. This document deals with the safety of microwave ovens for household and similar use, their rated voltage being not more than 250 V. This document also deals with combination microwave ovens, for which Annex AA is applicable. This document also deals with microwave ovens intended to be used on board ships, for which Annex BB is applicable. 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. However, if the appliance is intended to be used professionally to process food for commercial purposes, the appliance is not considered to be for household and similar use only. 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 ——persons (including children) whose • physical, sensory or mental capabilities; or • lack of experience and knowledge prevents them from using the appliance safely without supervision or instruction; ——children playing with the appliance. Note 101: Attention is drawn to the fact that ——for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements can be necessary; ——in many countries, additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour and similar authorities. Note 102: This standard does not apply to ——commercial microwave ovens (GB/T 4706.90); ——industrial microwave heating equipment (GB 5959.6); ——appliances for medical purposes (GB 9706); ——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). 2 Normative references This clause of 4706.1-2024 is applicable except as follows. Addition: GB/T 4706.14 Safety of household and similar electrical appliances - Part 14: Particular requirements for grills,toasters and similar portable cooking appliances (GB/T 4706.14-2024, IEC 60335-2-9:2019, IDT) GB/T 4706.22-2024 Safety of household and similar electrical appliances - Part 22: Particular requirements for stationary cooking ranges,hobs,ovens and similar appliances (IEC 60335-2-6:2018, IDT) IEC 60068-2-6 Environmental testing - Part 2: Tests - Test Fc: Vibration (sinusoidal) IEC 60068-2-27 Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock IEC 60068-2-52 Environmental testing - Part 2-52: Tests - Test Kb: Salt mist, cyclic (sodium chloride solution) IEC 60335-2-5:2012 Household and similar electrical appliances - Safety - Part 2-5: Particular requirements for dishwashers 3 Terms and definitions This clause of 4706.1-2024 is applicable except as follows. 3.1.7 Addition: NOTE 101: The rated frequency is the input frequency. 3.1.9 Replacement: normal operation operation of the appliance with 1000 g ± 50 g of potable water at an initial temperature of 20 °C ± 2 °C in a cylindrical borosilicate glass vessel having a maximum thickness of 3 mm and an outside diameter of approximately 190 mm. The vessel is placed on the centre of the shelf 3.101 microwave oven appliance using electromagnetic energy in one or several of the ISM frequency bands 1 between 300 MHz and 30 GHz, for heating food and beverages in a cavity Note: ISM frequency bands are the electromagnetic frequencies established by the ITU and reproduced in CISPR 11. 3.102 combination microwave oven microwave oven in which heat is also provided in the cavity by simultaneous or consecutive operation of resistive heating elements Note: The resistive heating elements are used to provide radiant heat, convection heat or steam. 3.103 cavity space enclosed by the inner walls and the door in which the load is placed 3.104 shelf horizontal support in the cavity on which the load is placed 3.105 door interlock device or system that prevents the operation of the magnetron, unless the oven door is closed 3.106 monitored door interlock door interlock system that incorporates a supervision device 3.107 temperature-sensing probe device that is inserted into the food to measure its temperature and is a part of an oven control 4 General requirement This clause of GB/T 4706.1-2024 is applicable.