GB/T 4706.1-2024 Safety of household and similar electrical appliances - Part 1: General requirements
1 Scope
This document specifies the safety requirements for household and similar electrical appliances.
This document deals with the safety of electrical appliances for household andsimilar purposes, their rated voltage being not more than 250 V for single-phase appliancesand 480 V for other appliances.
Note 1: Battery-operated appliances and other d.c. supplied appliances are within the scope of this standard.Dual supply appliances, either mains-supplied or battery-operated, are regarded as battery-operated applianceswhen operated in the battery mode.
Appliances not intended for normal household use but which nevertheless may be a source ofdanger to the public, such as appliances intended to be used by lavmen in shops. in lightindustry and on farms, are within the scope of this standard.
Note 2: Examples of such appliances are catering equipment, cleaning appliances for commercial use, andappliances for hairdressers.
This document deals with the reasonably foreseeablehazards presented by appliances that are encountered by all persons.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 3: Attention is drawn to the fact that
——for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may benecessary;
——in many countries, additional reguirements 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 4: 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 acorrosive or explosive atmosphere(dust,vapour or gas);
——audio, video and similar electronic apparatus (lEC 60065);
——appliances for medical purposes (lEC 60601);
——hand-held motor-operated electric tools (lEC 60745):
——personal computers and similar equipment (lEC 60950-1):
——transportable motor-operated electric tools (lEC 61029)
2 Normative references
The following referenced documents are indispensable for the application of this document.For dated references. only the edition cited applies. For undated references, the latest editionof the referenced document (including any amendments) applies.
GB/T 11021-2014 Electrical insulation - Thermal evaluation and designation (IEC 60085:2007, IDT)
GB/T 12113-2023 Methods of measurement of touch current and protective conductor current (IEC 60990:2016, IDT)
GB/T 14536.9-2008 Automatic electrical controls for household and similar use - Particular requirements for electrically operated water valves including mechanical requirements (IEC 60730-2-8:2003, IDT)
GB/T 16842-2016 Protection of persons and equipment by enclosures - Probe for verification (IEC 61032:1997, IDT)
GB/T 16935.1-2008 Insulation coordination for equipment within low-voltage systems - Part 1: Principles requirements and tests (IEC 60664-1:2007, IDT)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
Note 1: An Index of the defined terms is provided at the end of this publication.
Note 2: When the terms "voltage" and "current" are used, they are r.m.s. values, unless otherwise specified.
3.1 Definitions relating to physical characteristics
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 andupper limits
3.1.3
working voltage
maximum voltage to which the part under consideration is subjected when the appliance issupplied at its rated voltage and operating under normal operation, with controls andswitching devices positioned so as to maximize the value
Note 1: Working voltage takes into account resonant voltages.
Note 2: 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
Note: lf no power input is assigned to the appliance, the rated power input for heating appliances andcombined appliances is the power input measured when the appliance is supplied at rated voltage and operatedunder normal operation.
3.1.5
rated power input range
power input range assigned to the appliance by the manufacturer, expressed by its lower andupper 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 issupplied 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 andupper limits
3.1.9
normal operation
conditions under which the appliance is operated in normal use when it is connected to thesupply mains
3.1.10
rated impulse voltage
voltage derived from the rated voltage and the overvoltage category of the appliancecharacterizing 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
Foreword I
Introduction V
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, acreage 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 that are recharged in the appliance
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) over voltage categories
Annex L (informative) Guidance for the measurement of clearances and acreage distances
Annex M (normative) Pollution degree
Annex N (normative) Proof tracking test
Annex O (informative) Selection and sequence of the tests of Clause 30
Annex P (informative) Guidance for the application of this standard to appliances used in warm damp equable climates
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits
Annex R (normative) Software evaluation
Annex S (normative) Battery-operated appliances powered by batteries that are non-rechargeable or not recharged in the appliance
Annex T (normative) UV radiation effect on non-metallic materials
Bibliography
Index of defined words
