Polycab Fire Survival Cables

3 Core x 2.50 sq.mm YWY : Plain Copper conductor, PVC insulated, laid up, innersheathed, G.I. wire armoured and PVC sheathed cable having 3 cores of 2.50 sq.mm conductor size. 4 core x 4.0 sq.mm AYWY: Aluminium conductor, PVC insulated, laid up, innersheathed, G.I. wire armoured and PVC sheathed cable having 4 cores of 4.0 sq.mm conductor size. 3 ½ core x 50 sq.mm AYFY: Aluminium conductor, PVC insulated, laid up, innersheathed, Steel strip armoured and PVC sheathed cable having 3 cores of 50 sq.mm and 1 core of 25 sq.mm conductor size. The following tables give construction details of Polycab cables as per IS: 1554 ({Part I) 1988. For current rating of Polycab cables with H.R. insulation increase the rating given in the following tables by 15%. The weights of the cables mentioned in the following tables are approximate and given for guidance only. They should never be used as criteria to check the lengths of the cables supplied. The best way to check the length of the supplied cable is by resistance method. Take the resistance of the full drum and divide the reading by the resistance of 1 mtr. length. To decide the size of the conductor, particularly that of the sector shaped conductor, we recommend the following method. Take weight of a small conductor piece and measure its weight in grams. Then find out the weight of the conductor in gms per meter length. Divide it by 2.7 in case of Aluminium and by 8.9 in case of copper. It will give the area of the cond