| BV | Bureau Veritas | Ranska |
| CEBEC | Comité Electrotechnique Belgic | Belgia |
| CSA | Canadian Standards Association | Kanada |
| cUL | Canadian Underwriters Laboratories | Kanada |
| cULus | Underwriters Laboratories | Kanada, USA |
| DEF STAN | Defence Standard | Iso-Britannia |
| DEMKO | Danske Elektriske Materialkontrol | Tanska |
| DIN | Deutsches Institut für Normung | Saksa |
| DNV | Det Norske Veritas | Norja |
| E.D.F. | Electricité de France | Ranska |
| EN | European Normative | Eurooppa |
| EN IEC 61386 | Conduit systems for electrical installation | Kansainvälinen |
| ENEC | European Norms Electrical Certification | Eurooppa |
| FIMKO | Suomalainen testaus ja sertifiointiyritys | Suomi |
| GL | Germanischer Lloyd | Saksa |
| KEMA KEUR | KEMA Quality B.V. | Hollanti |
| LR | Lloyd´s Register | Iso-Britannia |
| LUL | London Underground Tested | Iso-Britannia |
| MIL | Military Specification | USA |
| NEMKO | Norges Elektriske Materiellkontroll | Norja |
| NF F | Norme Française Ferroviaire | Ranska |
| PAN | Panvia Aircraft GmbH | Saksa |
| SAE - AMS | Society of Automotive Engineers - Aerospace Material Specifications | Kansainvälinen |
| SEMKO | Sveriges Elektriska Materielkontrol | Ruotsi |
| UL, UL224 | Underwriters Laboratories | USA |
| UR | Underwriters Laboratories Recognized Component | USA |
| VDE | Verband der Elektrotechnik Elektronik Informationstechnik e.V. | Saksa |
| VG | Verteidigungsgerätenorm der Bundeswehr | Saksa |