CB Scheme

CB Scheme
Name	CB Scheme
Type	Certification program
Established	1974
Owner	International Electrotechnical Commission for Electrical Equipment (IEC)
Scope	International

CB Scheme

The CB Scheme is an international system for mutual acceptance of electrical safety test results among national Standards Organizations and Certification Bodys. It facilitates market access across International Electrotechnical Commission (IEC) member National Committees, streamlining conformity assessment for manufacturers, importers, and testing Laboratorys. The Scheme interacts with ISO, IECEx, UL LLC, TÜV Rheinland, and regional regulatory frameworks such as the European Union directives and China Compulsory Certification processes.

Overview

The CB Scheme provides a structured program where a product tested by an accredited Laboratory can receive a CB Test Report and CB Certificate recognized by participating Certification Bodys and Standards Organizations such as Standards Australia, Bureau of Indian Standards, Underwriters Laboratories, SGS S.A., Korea Testing Laboratory, Canadian Standards Association, DIN Deutsches Institut für Normung, and British Standards Institution. It relies on harmonized IEC 60950-1, IEC 61010-1, IEC 60335-1, and other IEC Standards to define safety requirements, enabling equivalence with National Standard adoption in markets like United States, Japan, Germany, France, Brazil, and Russia. The system reduces redundant testing and aligns with multilateral agreements among Accreditation Bodys such as ILAC and IAF.

History

The CB Scheme originated under the auspices of the IEC to address divergent national approval processes that affected trade among industrialized economies including United States, United Kingdom, Germany, Japan, and France. Early participants included VDE and CSA Group, with expansion into Asia driven by Japan Electrical Safety & Environment Technology Laboratories and Korea Testing Laboratory. Throughout the 1980s and 1990s, harmonization of IEC publications like IEC 60065 and IEC 60950 facilitated wider adoption by markets such as China, India, Australia, and Canada. The Scheme adapted to emerging constraints introduced by supranational entities including the European Commission and bilateral trade agreements like the WTO framework.

Architecture and Components

The CB Scheme's architecture comprises accredited CB Laboratorys, CB Test Reports, CB Certificates, and national Certification Body acceptance procedures. Key components reference IEC normative documents such as IEC 61558, IEC 62368-1, IEC 60529, and IEC 60745, with test methods implemented by accredited bodies including Intertek Group plc, TÜV SÜD, Bureau Veritas', Eurofins Scientific, and national labs like NATIONAL INSTITUTE FOR TESTING. The CB Test Report contains technical annexes, test data, and deviations referenced to IEC RER, enabling translating into national certificates issued by entities such as SGS, ETL SEMKO, CSA, and UL LLC. Accreditation oversight comes from International Laboratory Accreditation Cooperation and national accreditors like UKAS, NABL, DAkkS, JAS-ANZ, and CNAS.

Implementation and Usage

Manufacturers engage CB Scheme pathways by selecting an accredited CB Laboratory such as TÜV Rheinland, Intertek, or SGS S.A. to execute testing to relevant IEC Standards. Importers combine CB Test Reports with national documentation for market entry in jurisdictions like European Union, United States, Canada, China, India, Australia, South Africa, and Mexico. Certification Bodies such as BSI Group, VDE, DEKRA, and UL LLC use CB deliverables to issue national approvals and marking. Supply chain stakeholders including OEMs, EMS Providers, and Distributors rely on CB artifacts to manage compliance across trade zones governed by institutions like WTO, ASEAN, and MERCOSUR.

Security and Compliance

Security considerations intersect with CB Scheme processes through test evidence integrity, chain-of-custody for samples, and compliance with standards addressing electrical safety, electromagnetic compatibility, and functional safety cited in IEC 61508 and IEC 62443 for certain product classes. Accreditation bodies such as ILAC and IAF enforce competence and impartiality criteria to mitigate conflicts of interest involving laboratories like Intertek or SGS. Regulatory convergence with European Commission directives (e.g., directives administered by European Committee for Standardization) and national laws in United States (CPSC), China (CNCA), and India (BIS) require documented conformity and traceability, while cybersecurity-related norms from ISO/IEC JTC 1 inform combined safety and security testing for networked appliances.

Criticisms and Limitations

Critics point to varying interpretations of IEC Standards among national Certification Bodys and inconsistent translation into local National Standards such as adaptations by BIS or GB Standard implementations in China. Concerns include potential market fragmentation when nonparticipating economies maintain distinct approval schemes like China Compulsory Certification or when national deviations constrain mutual recognition by bodies such as UL LLC or CSA Group. Other limitations involve capacity bottlenecks at large laboratories (e.g., TÜV SÜD, Intertek), delays in test report issuance, and gaps addressing emerging technologies covered by IEC 62368-1 revisions and overlapping regimes like IECEx for explosive atmospheres or sector-specific certification for Railway and Aerospace sectors.

Future Developments and Roadmap

The CB Scheme roadmap emphasizes digitalization of CB Test Reports, interoperability with eIDAS-style trust frameworks, and alignment with evolving IEC publications including updated editions of IEC 62368-1 and sector extensions relevant to 5G, IoT, and Smart Grid ecosystems. Collaborative initiatives with ISO, UNECE, and regional bodies like ASEAN aim to reduce technical barriers to trade and expand recognition among emerging markets such as Brazil (INMETRO), South Korea (KTR), Indonesia (BSN), and Russia (GOST R). Improvements may include joint accreditation pilots with ILAC and enhanced cybersecurity test protocols influenced by ISO/IEC 27001 and NIST frameworks.

Category:International standards