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AWG Diameter Amps Ohms/1000' Electrical Dry/Wet ------------------------------------------------------------- High Temp Insulation 0000 .460 312. 0.04906 Nat'l Elect Code 000 .40964 262. 0.06186 260 00 .3648 220. 0.07801 225 0 .32486 185. 0.09831 195 1 .2893 156. 0.12404 165 2 .25763 131. 0.1563 115/95 140 3 .22942 110. 0.19723 100/80 120 4 .20431 92.3 0.24869 85/70 105 5 .18194 77.6 0.31361 6 .16202 65.2 0.39546 56/55 95 7 .14428 54.8 0.49871 8 .12849 46.1 0.6529 45/40 60 9 .11443 38.7 0.7892 10 .10189 32.5 0.8441 30/30 - Can handle more but 30 is code max 11 .090742 27.3 1.254 12 .080808 23.0 1.580 20/20 - Can handle more but 20 is code max 13 .071961 19.3 1.995 14 .064084 16.2 2.504 15/15 - Can handle more but 15 is code max 15 .057068 13.6 3.172 16 .05082 11.5 4.001 24 17 .045257 9.6 5.04 18 .040303 8.1 6.36 18 19 .03589 8.25 20 .031961 10.12 21 .028462 12.76 22 .025347 16.25 23 .022571 20.30 24 .0201 25.60 25 .0179 32.2 26 .01594 40.7 27 .014195 51.3 28 .012641 64.8 29 .011257 81.6 30 .010025 103. 31 .008928 130. 32 .00795 164. 33 .00708 206. 34 .006304 260. 35 .005614 328. 36 .005 414. 37 .004453 523. 38 .003965 660. 39 .003531 832. 40 .003144 1049.Grounding Cables (Reference NEC Table 250-122 (National Electrical Code)) Main Breaker - Copper Wire Size 60 10 100 8 200 6 300 4 400 2