Standard No.:	GB/T 4706.90-2024
English Name:	Safety of household and similar electrical appliances - Part 90 : Particular requirements for commercial electric microwave ovens
Chinese Name:	家用和类似用途电器的安全 第90部分：商用微波炉的特殊要求
Professional Classification:	GB    National Standard
Issued by:	State Administration for Market Regulation; Standardization Administration of China
Issued on:	2024-07-24
Implemented on:	2026-8-1
Status:	to be valid
Superseding:	GB 4706.90-2014 Household and similar electrical appliances - Safety - Particular requirements for commercial microwave ovens
Language:	English
File Format:	PDF
Word Count:	28500 words
Price(USD):	855.0
Delivery:	via email in 1~3 business day

Safety of household and similar electrical appliances - Part 90 : Particular requirements for commercial electric microwave ovens 1 Scope This clause of GB/T 4706.1-2024 is replaced by the following. This standard deals with the safety of microwave ovens with a cavity door intended for commercial use, their rated voltage being not more than 250 V for single-phase appliances connected between one phase and neutral and 480 V for other appliances; This standard applies to the safety of combination microwave ovens with a cavity door, the requirements for which are contained in Annex AA; This standard also applies to the safety of microwave ovens without a cavity door and with transportation means that are intended for commercial use only, for the heating of food and beverages, the requirements for which are contained in Annex BB. This standard applies to microwave ovens covered by Annex BB have transportation means for moving the load through the microwave oven. Requirements for tunnel microwave ovens and several types of microwave vending machines are covered. This standard also deals with microwave ovens intended to be used on board ships, for which Annex EE is applicable. Note 101: In Annex BB, a microwave oven without a cavity door and with transportation means is described as a microwave oven. All clauses of this standard apply to these appliances unless otherwise specified in Annex BB. This standard also takes into account ordinary persons having access to the removing area of the vending machine. Note 102: The appliance may be built into a vending machine, in which case IEC 60335-2-75 may also be applicable. Note 103: Appliances that use non-electrical energy are within the scope of this standard. In general, this standard does not take into account - the use of appliances by young children or infirm persons without supervision; - playing with the appliance by young children. This standard does not take into account the use of a microwave oven without a cavity door and with transportation means by ordinary persons except in the vicinity of entrance and exit ports. Note 104: The rationales for particular microwave exposure conditions and measures related to microwave energy being confined by an open structure are in Annex BB. Note 105: Attention is drawn to the fact that - for appliances intended to be used in vehicles or on trains, on board ships or board aircraft, additional requirements may be necessary; - for appliances intended to be used in tropical countries, special requirements may be necessary; - in many countries, the national health authorities, the national authorities responsible for the protection of labour and similar authorities specify additional requirements; - in many countries, national authorities specify additional requirements to Annex BB.22.119.1 . Note 106: This standard does not apply to - household microwave ovens including combination microwave ovens (IEC 60335-2-25); - industrial microwave heating equipment (IEC 60519-6); - appliances for medical purposes (IEC 60601); - 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 GB/T 4706.1-2024 is applicable except as follows. IEC 60068-2-6 Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal) Note: GB/T 2423.10-2019 Environmental testing - Part 2 : Tests methods - Test Fc : Vibration (sinusoidal) (IEC 60068-2-6:2007, IDT) IEC 60068-2-27 Environmental testing - Part 2-27 : Tests-Test Ea and guidance : Shock Note: GB/T 2423.5-2019 Environmental testing - Part 2 : Test methods - Test Ea and guidance : Shock (IEC 60068-2-27:2008, IDT) IEC 60068-2-52 Environmental testing - Part 2-52 : Tests-Test Kb: Salt mist, cyclic (sodium chloride solution) Note: GB/T 2423.18-2021 Environmental testing - Part 2 : Test methods - Test Kb:Salt mist, cyclic(sodium chloride solution) (IEC 60068-2-52:2017, IDT) IEC 60245 (all parts) Rubber insulated cables - Rated voltages up to and including 450/750 V Note: GB/T 5013 (all parts) Rubber insulated cables of rated voltages up to and including 450/750 V [IEC 60245 (all parts)] IEC 60335-2-36 Household and similar electrical appliances - Safety - Part 2-36 : Particular requirements for commercial electric cooking ranges, ovens, hobs and hob elements Note: GB/T 4706.52-2024 Safety of household and similar electrical appliances—Part 52:Particular requirements for commercial electric cooking ranges,ovens,hobs and hob elements (IEC 60335-2-36:2017, IDT) IEC 60335-2-42 Household and similar electrical appliances - Safety - Part 2-42 : Particular requirements for commercial electric forced convection ovens, steam cookers and steam-convection ovens Note: GB/T 4706.34-2024 Safety of household and similar electrical appliances - Part 34 : Particular requirements for commercial electric forced convectionovens, steam cookers and steam-convection ovens (IEC 60335-2-42:2017, IDT) IEC 60335-2-49 Household and similar electrical appliances-Safety-Part 2-49 : Particular requirements for commercial electric appliances for keeping food and crockery warm) Note: GB/T 4706.51-2024 Safety of household and similar electrical appliances - Part 51 : Particular requirements for commercial electric appliances for keeping food and crockery warm (IEC 60335-2-49:2017, IDT) IEC 60335-2-75 Household and similar electrical appliances - Safety - Part 2-75 : Particular requirements for commercial dispensing appliances and vending machines Note: GB/T 4706.72-2024 Safety of household and similar electrical appliances - Part 72 : Particular requirements for commercial dispensing appliances and vending machines (IEC 60335-2-75:2018, IDT) IEC 60436:2020 Electric dishwashers for household use - Methods for measuring the performance) Note: GB/T 20290-2016 Electric dishwashers for household use - Methods for measuring the performance (IEC 60436:2012, MOD) 3 Terms and definitions This clause of GB/T 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 under the following conditions: The appliance is operated 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. If the rated microwave power output exceeds 2200 W, two such vessels are used and placed contiguously in the cavity. 3.101 microwave oven appliance using electromagnetic energy in one or several of the ISM (industrial, scientific, medical) frequency bands 1 between 300 MHz and 30 GHz, for heating food and beverages in a cavity 3.102 rated microwave power output microwave power output assigned to the appliance by the manufacturer 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 3.108 instructed person person who is sufficiently instructed and monitored to know how to avoid any danger caused by the operation of microwave ovens 3.109 skilled person person with suitable professional education, knowledge and experience to discern and to avoid any danger caused by the operation of microwave ovens 3.110 ordinary person person who is neither a skilled person nor an instructed person 3.111 transportation means means to transport the load through the microwave oven Note: An example of a transportation means is a belt, an arm or an inclined plane. 3.112 load food and beverages that can be heated up in a microwave oven