| BV | Bureau Veritas | France |
| CEBEC | Comité Electrotechnique Belgic | Belgium |
| CSA | Canadian Standards Association | Canada |
| cUL | Canadian Underwriters Laboratories | Canada |
| cULus | Underwriters Laboratories | Canada, USA |
| DEF STAN | Defence Standard | Great Britain |
| DEMKO | Danske Elektriske Materialkontrol | Denmark |
| DIN | Deutsches Institut für Normung | Germany |
| DNV | Det Norske Veritas | Norway |
| E.D.F. | Electricité de France | France |
| EN | European Normative | Europe |
| EN IEC 61386 | Elektroinstallationsrohrsysteme | International |
| ENEC | European Norms Electrical Certification | Europe |
| FIMKO | Suomalainen testaus ja sertifiointiyritys | Finland |
| GL | Germanischer Lloyd | Germany |
| KEMA KEUR | KEMA Quality B.V. | Netherlands |
| LR | Lloyd´s Register | Great Britain |
| LUL | London Underground Tested | Great Britain |
| MIL | Military Specification | USA |
| NEMKO | Norges Elektriske Materiellkontroll | Norway |
| NF F | Norme Française Ferroviaire | France |
| PAN | Panvia Aircraft GmbH | Germany |
| SAE - AMS | Society of Automotive Engineers - Aerospace Material Specifications | International |
| SEMKO | Sveriges Elektriska Materielkontrol | Sweden |
| UL, UL224 | Underwriters Laboratories (Yellow Card) | USA |
| UR | Underwriters Laboratories Recognized Component | USA |
| VDE | Verband der Elektrotechnik Elektronik Informationstechnik e.V. | Germany |
| VG | Verteidigungsgerätenorm der Bundeswehr | Germany |