Five conductors to distribute electricity

Elektrizitätswerk Dietlikon are the first regional utility known to use 5-core underground cables for the new-built, extension and repair sectors. The cable has 3 phase conductors made of aluminium, 1 neutral conductor of equal cross section but made of copper for coping with the potential harmonic currents and a copper screen used as PE conductor. This was the best compromise that could be achieved in negotiations with the cable maker who first wanted to use only aluminium.