"cb" generally refers to CB certification, which is an international system operated by IECEE. The certification agencies of IECEE member countries test the safety performance of electrical products based on IEC standards. The test results are CB test reports and CB test certificate is a mutually recognized system among IECEE member countries.

The purpose is to reduce international trade barriers that arise from having to meet different national certification or approval guidelines. IECEE is the abbreviation of the International Electrotechnical Commission Electrical Product Qualification Testing and Certification Organization.

Regarding the application for CB test certificate, the following points should be noted:

(1) The application for CB test certificate can be submitted by the applicant to any "issuer" covering the product range. Certification/Accreditation” NCB.

(2) The applicant can be either a manufacturer or an entity authorized to represent the manufacturer.

(3) The application may include one or more factories producing products in one or more countries.

(4) Applicants/manufacturers/factories located in countries without IECEE member institutions need to pay an additional fee of 150 Swiss francs for each CB test certificate to compensate for the operating costs of the system. This fee is collected by the NCB that accepts CB test certificate applications and will be credited to the IECEE account.

(5) Applicants can request NCB to test products based on national differences in the country where the product is sold.

Reference for the above content: Baidu Encyclopedia-CB certification