Size in Area Weight/ current carrying capacity in amp ( copper ) at 35 mm sqmm km AC ( no. of bus) DC ( no. of bus) I II III II II I II III II II 12X2 24 110 200 115 205 15X2 30 140 200 145 245 15X3 75 170 300 175 305 20X2 40 185 315 190 325 20X3 60 220 380 225 390 20X5 100 295 500 300 510 25X3 75 270 460 275 470 25X5 125 350 600 355 610 ...