The course reviews selected changes and clarifications in NEK 400:2026 that are important for the design and execution of electrical low-voltage systems. The content is aimed at areas where important adjustments have been made or new requirements have been introduced in the standard. The course instructor, Edgar Karlsen, is a member of NEK's technical committee for NEK 400 (NK64), and brings insights from the work on the standard into the course – with a focus on how the changes actually affect in practice.
The implementation is set up as a combination of academic lectures and discussion. Emphasis is placed on practical examples and direct comparison of old and new wording where relevant. Participants are encouraged to bring their own issues from practice.
What you will learn on the course
- Fire safety for cables: CPR classification (Dca-s2d2a1) is introduced as a normative requirement - PVC is phased out and halogen-free cables become the standard. The course goes through the consequences for dimensioning, current carrying capacity and clamping temperature.
- DC installations: new and expanded requirements throughout the standard, including photovoltaics, EV charging, caravans and ICT
- Solar cell installations (NEK 400-7-712): completely revised section with new requirements for fire safety, DC marking and battery storage
- Electric car charging (NEK 400-7-722) and charging-ready buildings (NEK 400-8-824): updated and new requirements including wireless charging and recharging (V2G)
- Housing (NEK 400-8-823): removal of equalisation requirements for plastic drainage pipes, and new requirements for sockets
- Two established solutions are discontinued: The "Tjøme sleeve" is removed from the standard, and surge protection in IT and TT systems must henceforth always be accident-proof
- Power over Ethernet (NEK 400-7-716): new section with normative requirements for PoE installations
- Fully revised sub-standards for swimming pools, temporary installations, removable units, power supply units and shelters
- Selected changes from NEK 399:2026, including that the connection cabinet (TKS) can now function as the installation's main distribution
Practical information
- The course day begins at 09.30 and ends at 16.00. The course will be held physically, in central Oslo. You will be sent an address in advance of the course.
- If you cancel one of our professional courses or conferences after the registration deadline, a fee of 20 percent of the course or conference price will be charged. In case of cancellation later than three working days before the event, or in case of no-show, the full course fee will be invoiced. To cancel a course, send an e-mail to
