What’s new (2024/2025)?
- Current edition: NEN 1010:2020+C1:2024 (published 1 July 2024), with substantive corrections and editorial improvements.
- Dutch Building Decree (Bbl, from 1 Jan 2025) references NEN 1010:2020+C1:2024; align designs and commissioning accordingly.
- New NPR 5310:2024 (practice guideline) with updated chapters on earthing & bonding and a reinstated part 51.
- EV/PV: consider DC residual currents → apply suitable RCD (Type B or Type A + 6 mA DC detection per manufacturer/standard); dedicate a final circuit, 30 mA RCD, ensure selectivity.
Design & installation
Select cables/conduits, protective devices, voltage drop and switchgear to suit use and environment.
- Indicative voltage drop targets (project dependent): ~3% lighting, ~≤5% other loads.
- Size conductors for permissible current, ambient temperature and installation method.
- Clear schematics, circuit schedules and labelling.
Protection & safety
- Earthing and RCD/RCBO selection (type A/AC/B or A with DC detection depending on application).
- Special locations (wet areas), SELV/PELV where required, fire-rated penetrations.
- Prove selectivity and disconnection times (loop impedance/trip time).
Testing & handover
Visual checks and measurements/tests (insulation, PE continuity, earth resistance, RCD test, loop impedance) with a handover dossier.