Neutral Current Diversion – Testing and Measurement of NCD
Neutral Current Diversion (NCD) Neutral current diversion (NCD) describes ‘stray’ neutral currents flowing in continuous and intact metallic structures, services and pipes in an installation that would otherwise return via the system neutral conductor. In particular neutral current diversion (NCD) may be an issue in multi-occupancy type buildings where the metallic services pass between properties. [...]