Safety of household and similar electrical appliances - Part 22：Particular requirements for stationary cooking ranges, hobs, ovens and similar appliances
Safety of household and similar electrical appliances - Part 22 : Particular requirements for stationary cooking ranges, hobs, ovens and similar appliances
1 Scope
This clause of GB/T 4706.1-2024 is replaced by the following.
This standard deals with the safety of stationary electric cooking ranges, hobs, ovens and similar appliances for household use,
This standard applies to the stationary electric cooking ranges, hobs, ovens and similar appliances for household use with the rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances.
This standard also includes some requirements for ovens that are intended to be used on board ships.
Note 101: Examples of appliances that are within the scope of this standard are
– griddles;
– grills;
– induction hobs;
– induction wok elements;
– pyrolytic self-cleaning ovens;
– steam ovens.
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 102: 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;
– additional requirements may be specified by the national health authorities concerned.
Note 103: This standard does not apply to
– appliances intended for commercial catering;
– 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);
– grills, toasters and similar portable cooking appliances (GB/T 4706.14);
– microwave ovens (GB/T 4706.21).
2 Normative references
This clause of GB/T 4706.1-2024 is applicable except as follows.
Addition:
GB/T 2423.5-2019 Environmental testing - Part 2 : Test methods - Test Ea and guidance : Shock (IEC 60068-2-27:2008, IDT)
GB/T 2423.10-2019 Environmental testing - Part 2 : Tests methods - Test Fc : Vibration (sinusoidal) (IEC 60068-2-6:2007, IDT)
IEC 60068-2-52:1996 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 60584-1 Thermocouples - Part 1: EMF specifications and tolerances
Note: GB/T 16839.1-2018 Thermocouples - Part 1 : EMF specifications and tolerances (IEC 60584-1 :2013, IDT)
3 Terms and definitions
This clause of GB/T 4706.1-2024 is applicable except as follows.
3.1.6 Addition:
Note: For appliances having more than three heating units per phase, other than those that are controlled by programmable electronic circuits that limit the input of heating elements and/or motors from being energized at the same time, a diversity factor is applied to the rated current or rated power input when determining the current used to establish the size of the terminals and the nominal cross-sectional area of the supply cord. The diversity factor F is calculated from the following formula:
3.1.9 Replacement:
normal operation
operation of the appliance as specified in 3.1.9.101 to 3.1.9.107
3.1.9.101 Hob elements, other than induction hob elements and induction wok elements, are operated with vessels containing cold water. The vessel is made of unpolished commercial quality aluminium, has a flat bottom and is covered with a lid that is positioned so that steam does not affect the tests. Thermal controls are adjusted to their highest setting until the water boils and then adjusted so that the water boils gently. Water is added to maintain the level during boiling.
In case of doubt, vessels as specified in Figure 101 are used.
Induction hob elements are operated with vessels as specified in Figure 102 that contain cooking oil at room temperature. Thermal controls are adjusted to their highest setting until the oil temperature reaches 180 °C ± 4 °C and then adjusted so that this temperature is maintained. The oil temperature is measured 10 mm above the centre of the bottom of the vessel.
Induction hob elements in a flexible induction cooking zone are operated with:
a) the maximum number of vessels which can be separately controlled at the same time, arranged to cover the flexible induction cooking zone as far as possible. Any combination of vessels giving the most unfavourable results shall be used for the test. Several vessels with the same diameter may be used;
b) the vessel which provides the highest power density (W/cm2);
c) the smallest vessel that allows an induction hob element to operate.
Vessels according to Figure 102 should be used for the tests. The vessel diameters specified in Figure 101 should be considered for the tests.
Operation as specified in a), b) or c), that results in the most unfavourable condition for the tests specified in the relevant subclauses is applied.
Foreword i
Introduction iv
1 Scope
2 Normative references
3 Terms and 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
Annexes
Annex R (Normative) Software evaluation
Bibliography
