| Firma |
|---|
| ABB Ludvika |
| ABB Power Grids Norway AS |
| Agder Energi Nett |
| Agder Energi Vannkraft |
| Alcoa Norway |
| BKK Nett |
| BKK Produksjon AS |
| Banenor |
| Berggård Amundsen & Co AS |
| EB Elektro AS |
| Elkem ASA Energi |
| Elvia AS |
| Energi Norge AS |
| Energia |
| Equinor |
| Eskeland Electronics AS |
| GE |
| Glitre Energi Nett AS |
| Glitre Energi Produksjon AS |
| Hafslund E-CO AS |
| Haugaland Kraft Nett AS |
| Helgeland Kraft Nett AS |
| Helgelands Kraft Nett AS |
| Hydro Aluminium AS - Hydro Energi |
| Istad Nett AS |
| Kama Solutions |
| Landsnet |
| Landsvirkjun |
| Lyse Elnett |
| Lyse Produksjon AS |
| MIP Industrinett AS |
| Mo Industripark |
| Multiconsult |
| Møre Trafo AS |
| Mørenett |
| NTE Energi |
| NTNU |
| NVE |
| Norconsult |
| Nordlandsnett AS |
| Norsk Hydro |
| Norsk Trafo Service AS |
| Omexom |
| Otra Kraft DA |
| Pensjonist |
| PowerTest |
| REN |
| Reinhausen Nordic AB |
| SFE Nett AS |
| SFE Produksjon |
| SINTEF |
| SKS Produksjon |
| SWECO Norge AS |
| Siemens AS |
| Sira-Kvina Kraftselskap |
| Skagerak Kraft AS |
| Skagerak Nett AS |
| Sognekraft AS |
| Statkraft Energi AS |
| Statnett |
| TJH2b |
| Tensio TN AS |
| Tensio TS AS |
| Troms Kraft Nett AS |
| Troms Kraft Produksjon |
| VPDiagnose AS |
| Vestfold Trafo Energi |
| Ymber Produksjon AS |
