Ensto insulated messenger wire system

An insulated messenger wire cable consists of one to five black, weather resistant, high density or cross-linked, polyethylene insulated conductors twisted around an insulated aluminium alloy messenger (typical tensile strength 300 N/mm²).

The messenger, which is also the neutral conductor, takes all the mechanical stress. The cross section of the phase conductors can vary from 16 to 185 mm² to meet the load current, maximum acceptable voltage drop and short circuit current of the network; the size of the messenger varies from 25 – 95 mm², depending on mechanical and electrical conditions.