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IECEE stands for "International Electrotechnical Commission for Electrical Equipment". For CB Scheme, the full name is "Scheme of the IECEE for Mutual Recognition of Test Certificates for Electrical Equipment", and the abbreviated name is "'Certification Bodies' Scheme". It is the first truly global mutual recognition system for electrical products established by IECEE.

CB Scheme is an international system operated by IECEE. All certification bodies of member states perform safety tests for electrical products according to IEC standards, the test results of a CB test report and CB test certificate, come with mutual recognition by these member states. CB Scheme aims to promote international trade in order to reduce the need to meet different national certification or approval criteria arising from international trade barriers. Through the promotion of harmonization between national standards and international standards, and cooperation between certification bodies, manufacturers are able to get closer to the ideal goal of "one test, fits all".

CB Scheme is based on international IEC standards, but if some Members' national standards cannot be entirely consistent with the IEC standard, national differences are allowed also, which should be released to other members. CB Scheme needs a CB test certificate to prove that product samples have successfully passed the appropriate tests and meet the requirements of the IEC and the Member States.

National Member Body (NMB)

National Member Body represents the seat of a member in IECEE, which currently has 47 member countries, in other words, 47 IECEE-NMB.

National Certification Body (NCB)

National Certification Body is the certification body which is authorized to issue a certificate for electrical products within the approved scope. To become a member of the CB Scheme, NCB's internal quality systems and technical capacity must meet specific requirements. According to the qualification, an NCB can be classified as a Recognizing NCB or as an Issuing and Recognizing NCB.

  • Recognizing NCB: CB certificate issued by other members' NCB, are recognized, but it does not issue its own.
  • Issuing and Recognizing NCB: Within the authorized scope by IECEE, this NCB issues its own CB certificates, while also recognizing the CB certificates issued by other members NCB's.

Previously, an NMB was allowed only one NCB. In order to expand mutual recognition of IECEE certification results and to promote international trade, as of January 1992 onwards, a country is allowed to have more than one national certification body (NCB) and testing laboratory. If a certification body in Hong Kong, Taiwan, or Macau wants to join IECEE, they must obtain the consent and recommendation of IECEE Chinese NCB; and if the laboratory wants to join the IECEE, they can choose any country's NCB.

In principle, the scope of an NCB recognizing certificate should be greater than the range of issuing CB certificate.

CBTL,CB testing Lab.

After the assessment and review on laboratory management and application criteria for testing ability according to IEC25 guidelines, the IECEE team would grant the approval of the testing laboratory to issue a CB testing report according to IEC specific standards. In principle, one CB testing laboratory should be in cooperation with only one NCB.

Difference between NMB, NCB, CBTL

It is possible that one member state has only one National Member Body (NMB) and has no National Certification Body (NCB) It is possible that one country has more than one NCB, and one can be an NCB and at the same time a CB testing laboratory. Additionally, one NCB may cooperate with more than one CB testing laboratories. It is possible that one NCB has no CB testing laboratory (as a Recognizing NCB)