The system of IECEE CB is electrician the product safe test report recognizes with each other the first real of international system.Its agreement with multilateral formation of national attestation organization( NCB) of the each nation, manufactory can with borrow the CB test certificate that a NCB distribute to acquire national attestation of other member's countries of the system of CB.

System of CB according to international standard of IEC.If the national standard of some member's countries can't still completely in accordance with the IEC standard, also allow the existence of the national difference, but should announce toward other members.The system of CB makes use of the CB test certificate to confirm that the product sample has already passed the appropriate test successfully, and meet the related IEC request and the request concerning member's countries.

The main target of the system of CB is promote international trade, its means is unify through standard and international standard in the push nation to moderate and the product attestation organization of cooperation, but make the manufactory even be near to in the target of ideal" test once, have another the place to apply". The history is first, the system of CB is to be start by the CEE(" the electricity equipments is qualified to test the national committee" in ex- Europe) of, and merge into the IEC in 1985.