Product Description
ABC Cable; Service Drop Cable

The basic construction is as follows: 
3 power cores consisting of standard aluminium conductors, insulated with

XLPE insulation
+ One sheath lighting aluminium conductor with XLPE insulation(optional)
+ One messenger Al-alloy conductor (bare or covered)

The messenger conductor can be of galvanised steel wire also. 
The purpose of messenger wire is
A) It acts as load bearing wire. 
B) It acts as earth or neutral conductor.