In A B Cables, there are three insulated cores and one insulated neutral core (optional) laid around a bare or covered messenger wire, which carries the load of the cable. There can be one additional power core for street lighting.
Power and Neutral Cores: Here, the conductor is composed of H2 or H4 grade Aluminium of Class 2 grade to IS: 8130/84. Popular sizes are 16mm2 to 95mm2. Again, insulation can be either cross linked Polyethylene or Polyethylene.