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CB Scheme - Upcoming Standard Changes for Electrical Safety Household Products and EMC Standards

Updates to IEC 60335-1:2020 deals with the safety of electrical appliances for household and similar purposes.

Household microwave

December 14, 2020

Written by: Ylenia Merli, Regulatory Program Expert

CB Scheme — International Standard IEC

The CB Scheme is a vast, international arrangement established by the International Electrotechnical Commission (IEC) for mutual acceptance of test reports among participating certification organizations in the field of electrical and electronic equipment.

The CB Scheme is an international network of product certification organizations in more than 50 countries around the world. It benefits product manufacturers and distributors engaged in international trade by providing:

  • Single point of product testing for efficient global market access
  • Global acceptance of test reports leading to national certification in CB Scheme member countries
  • Unilateral acceptance of test reports in many developing countries that are not yet participating in the CB Scheme

On September 2, 2020, IEC 60335-1:2020 was published.

IEC 60335-1:2020 deals with the safety of electrical appliances for household and similar purposes, with a rated voltage not more than 250 V for single-phase appliances and 480 V for other appliances including DC-supplied appliances and battery-operated appliances. 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.

This sixth edition cancels and replaces the fifth edition published in 2010, Amendment 1: 2013 and Amendment 2:2016.

This edition constitutes a technical revision and includes the following significant technical changes with respect to the previous edition (minor changes are not listed):

  • Updated the text of this standard to align with the most recent editions of the dated normative references
  • Deleted some notes and converted many other notes, in whole or in part, to normative text
  • Changed some Annex designations from normative to informative
  • Introduced information on Guidance documents concerning the application of the safety requirements covered by IEC 60335 series and on how to retrieve them
  • Clarified requirements for PELV circuits
  • Clarified requirements on measurement of power input and rated current when they vary throughout the operating cycle
  • Replaced normative Annex S with the informative Annex S "Guidance for the application of this standard on measurement of power input and current based on the requirements of 10.1 and 10.2 concerning the representative period"
  • Introduced and clarified mechanical strength requirements for appliances with integral pins for insertion into socket-outlets
  • Revised requirements for battery-operated appliances
  • Introduced requirements for metal-ion batteries including a new Clause 12 Charging of metal-ion batteries
  • Introduced the application of test probe 18
  • Introduced requirements for appliances incorporating appliance outlets and socket-outlets accessible to the user
  • Revised and clarified requirements for appliances incorporating a functional earth
  • Introduced moisture resistance test requirements for appliances that incorporate an automatic cord reel and that have a second numeral IP rating
  • Clarified the appliance test criteria for the moisture resistance for appliances and parts of appliances with integral pins for insertion into socket-outlets
  • Introduced limits on the output voltage of an accessible safety extra-low voltage outlet or connector or USB under abnormal operation conditions
  • Introduced requirements to cover optical radiation hazards
  • Introduced external communication software management items into normative Annex R
  • Revised external communication requirements in Table R.1 and Table R.2
  • Introduced, in new normative Annex U, cybersecurity requirements to avoid unauthorized access and the effects of transmission failures via remote communication through public networks

This part is to be used in conjunction with the appropriate part 2 of IEC 60335. Part 2 contains clauses to supplement or modify the corresponding clauses in this part to provide the relevant requirements for each type of appliance.

This sixth edition of IEC 60335-1 is only to be used in conjunction with part 2 that have been established on the basis of this edition.

On September 16, 2020, new standard IEC 60335-2-24 :2020 was published.

IEC 60335-2-24:2020 deals with the safety of the following appliances, their rated voltage being not more than 250 V for single-phase appliances, 480 V for other appliances and 24 V DC for appliances when battery operated:

  • Refrigerating appliances for household and similar use
  • Icemakers incorporating a motor-compressor and icemakers intended to be incorporated in frozen food storage compartments
  • Refrigerating appliances and icemakers for use in camping, touring caravans and boats for leisure purposes

These appliances may be operated from the mains or from a separate battery or operated either from the mains or from a separate battery.

This standard also deals with the safety of ice-cream appliances intended for household use, their rated voltage being not more than 250 V for single-phase appliances and 480 V for other appliances. It also deals with compression-type appliances for household and similar use that use flammable refrigerants.

Refrigerating appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as

  • Refrigerating appliances used in staff kitchen areas in shops, offices and other working environments
  • Refrigerating appliances used in farmhouses and by customers in hotels, motels and other residential type environments
  • Refrigerating appliances used in bed-and-breakfast type environments
  • Refrigerating appliances used in catering and similar non-retail applications
    are within the scope of this standard

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

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 national health authorities, the national authorities responsible for the protection of labor, the national water supply authorities and similar authorities.

This eighth edition cancels and replaces the seventh edition published in 2010, Amendment 1:2012 and Amendment 2:2017. This edition constitutes a technical revision.


This edition includes the following significant technical changes with respect to the previous edition:

  • Aligns the text with IEC 60335-1, Ed 5.2
  • Some notes have been converted to normative text or deleted
  • Normative references and associated text have been updated
  • Definition of free space has been clarified
  • Measurement of the input current of refrigerating appliances using inverter driven motor-compressors is included
  • Compatibility tests for winding insulation of motor-compressors used with different types of refrigerants and oils have been introduced
  • Requirements for inadvertent contact points between uncoated aluminum pipes and copper pipes have been updated
  • Testing of accessible glass panels has been clarified
  • In refrigerating appliances, requirements for material encasing and in contact with thermal insulation have been introduced and consequential text has been deleted
  • Requirements for motor running capacitors have been updated
  • The locked rotor test for fan motors has been clarified

This part 2 is to be used in conjunction with the latest edition of IEC 60335-1 and its amendments. It was established on the basis of the fifth edition (2010) of that standard.

On Oct. 5, 2020, the new standard IEC 60034-11:2020 was published.

IEC 60034-11:2020 deals with specific requirements relating to the use of thermal protectors and thermal detectors incorporated into the stator windings or placed in other suitable positions in induction machines in order to protect them against serious damage due to thermal overloads.

It applies to single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with IEC 60034-1 and IEC 60034-12 that:

  • Have a rated voltage up to 1,000 V
  • Are intended for direct-on-line or star-delta starting

The main changes with respect to the previous edition are:

  • Additional specification of winding temperature limits for temperature class 200 (N)
  • Increased limits of maximum winding temperatures for overloads with rapid variation
  • Clarification that the motor winding may be permanently damaged after it has been exposed to temperatures
  • Clarification of the definition of indirect thermal protection
  • Clarification on the test methods for larger motors

On Oct. 7, 2020, the new standard IEC 60034-7:2020 was published.

IEC 60034-7:2020 specifies the IM Code, a classification of types of construction, mounting arrangements and the terminal box position of rotating electrical machines.

Two systems of classification are provided as follows:

  • Code I: An alphanumeric designation applicable to machines with end-shield bearing(s) and only one shaft extension
  • Code II: An all-numeric designation applicable to a wider range of types of machines including types covered by Code I

This third edition cancels and replaces the second edition, published in 1992, and its Amendment 1:2000. The main technical changes with regard to the previous edition are as follows:

  • Note on twin motors added
  • Reference to 4.3 instead of duplication of text
  • New subclause on marking of shaft inclination or declination

On Sept. 7, 2020, the new standard CISPR 14-1:2020 was published.

CISPR 14-1:2020 specifies the requirements that apply to the emission of radio-frequency disturbances in the frequency range 9 kHz to 400 GHz from appliances, electric tools and similar apparatus as defined below, whether powered by AC or DC (including a battery). This document is applicable to the following equipment:

  • Household appliances or similar equipment
  • Electric tools
  • Similar apparatus

This seventh edition cancels and replaces the sixth edition published in 2016. This edition constitutes a technical revision and includes the following significant changes with respect to the previous edition:

  • Extension of the frequency range for radiated measurements above 1 GHz
  • Revision of general test conditions and addition of new specific test conditions, e.g., for robotic equipment
  • Introduction of additional requirements for equipment making use of inductive power transfer technology
  • Removal from the normative text of any compliance requirement based on statistical evaluation
  • Revision of clicks analysis, with particular relevance to the determination of the observation time and the application of the upper quartile method for different types of click analyzers

On Aug. 31, 2020, the new standard CISPR 14-2:2020 was published.

CISPR 14-2:2020 specifies the electromagnetic immunity requirements in the frequency range 0 Hz to 400 GHz that apply to appliances, electric tools and similar equipment as specified below, whether powered by AC or DC (including a battery). This document specifies immunity requirements for continuous and transient electromagnetic disturbances, both conducted and radiated. Unless otherwise specified, this document is applicable to all equipment in the scope of CISPR 14-1, namely:

  • Household appliances or similar equipment
  • Electric tools
  • Similar equipment
  • Refer to the scope of the document for examples of equipment

This third edition cancels and replaces the second edition published in 2015. This edition constitutes a technical revision and includes the following significant technical changes with respect to the previous edition:

  • Extension of the frequency range for radiated immunity above 1 GHz
  • An advanced categorization of equipment
  • Revision of general test conditions and addition of new specific test conditions, e.g., for robotic equipment
  • Clarification of requirements applicable to equipment incorporating radio functions
  • Addition of requirements for wired network ports
  • Revision of definitions and addition of new ones
  • Deletion of requirements referring to statistical evaluation

On Sept. 8, 2020, the new standard IEC 61000-4-3:2020 was published.

IEC 61000-4-3:2020 is applicable to the immunity requirements of electrical and electronic equipment to radiated electromagnetic energy. It establishes test levels and the required test procedures. The object of this document is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to radiated, radio-frequency electromagnetic fields. The test method documented in this part of IEC 61000 describes a consistent method to assess the immunity of equipment or systems against RF electromagnetic fields from RF sources not in close proximity to the equipment under test (EUT).

This fourth edition cancels and replaces the third edition published in 2006, Amendment 1:2007 and Amendment 2:2010. This edition constitutes a technical revision and includes the following significant technical changes with respect to the previous edition:

  • Testing using multiple test signals has been described
  • Additional information on EUT and cable layout has been added
  • Upper frequency limitation has been removed to take account of new services
  • Characterization of the field as well as the checking of power amplifier linearity of the immunity chain are specified

On July 30, 2020, the new standards IEC 61000-6-3:2020 and IEC 61000-6-8:2020 were published.

IEC 61000-6-3:2020 Electromagnetic compatibility (EMC) deals with emission standards for equipment in residential environments.

This part of IEC 61000 for emission requirements applies to electrical and electronic equipment intended for use at residential locations. It also applies to electrical and electronic equipment intended for use at other locations that do not fall within the scope of IEC 61000-6-8 or IEC 61000-6-4. The intention is that all equipment used in the residential, commercial and light-industrial environments are covered by IEC 61000-6-3 or IEC 61000-6-8.

This third edition cancels and replaces the second edition published in 2006 and its Amendment 1:2010. This edition constitutes a Template Ed. 3.0 - Issued: April 2020 technical revision and includes the following significant technical changes with respect to the previous edition:

  • Alternative method for measuring conducted emissions on DC ports
  • Limits and requirements applicable only to equipment intended to be used in residential locations
  • More stringent limits for DC power ports

IEC 61000-6-8:2020 Electromagnetic compatibility (EMC) deals with emission standard for professional equipment in commercial and light-industrial locations.

IEC 61000-6-8: 2020 is a generic EMC emission standard and is applicable only if no relevant dedicated product or product family EMC emission standard has been published. This part of IEC 61000 for emission requirements applies to electrical and electronic equipment intended for use in commercial and light-industrial locations.

This document applies to equipment that satisfies the following restrictions of use:

  • Defined as professional equipment
  • Professionally installed and maintained
  • Not intended to be used in residential locations

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