... core cable is not permissible to lay in magnetic ductVLVAluminium conductor ,PVC insulated ,PVC sheathed power cableVYCopper conductor, PVC insulated, PE sheathed power cableVLYAluminium conductor ,PVC insulated ,PE sheathed power cableVV22Copper conductor ,PVC insulated ... ,PE sheathed power cableNote: The armoured single core cables is only used for D.C.system. As for A.C.system,non-magnetic ...