... c). CONSTRUCTION : voltage grade, size range & specifications 1. Single core cable :- Annealed tinned copper or aluminium conductor, insulated with ... & varnished.2. Multi core cable :- Cores constructed as single core cable, distinguishably colour coded & laid up circular with ... sheath such as silicone, neoprene & CSP sheath, wire braid or single wire or strip armoured/screened also can be supplied. ...