how to calculate ampere rating in the copper plate or aluminum plate for 1sqmm?
Here is a table with the AWG converted to Circ Mils and square inchesYou can interpret this in this mannerIf you have a know cross sectional area for any copper plate compare it to a known crossectional area of a wires amperage for instance .A 4/0 wire may carry 225amps(example) it has a crossectional area of .1662 sq inches dividing this out we find that 1/.16626.02 so 1 sq inch will carry 6.02 x 225 or 1354.5Amps.The same type of calculation applies for your metric problem one cir mil .000506671 mm^2This table was copied from the webThe amperage of copper changes with temperature so an aproximate value was chosen for the example.A temperature correction formulae is available.There ya go from the EWIRE TABLE FOR SOLID, ROUND COPPER CONDUCTORS Size Diameter Cross-sectional area Weight AWG inches cirmils sqinches lb/1000 ft 4/0 - 0.4600 - 211,600 - 0.1662 - 640.5 3/0 - 0.4096 - 167,800 - 0.1318 - 507.9 2/0 - 0.3648 - 133,100 - 0.1045 - 402.8 1/0 - 0.3249 - 105,500 - 0.08289 - 319.5 1 - 0.2893 - 83,690 - 0.06573 - 253.5 2 - 0.2576 - 66,370 - 0.05213 - 200.9 3 - 0.2294 - 52,630 - 0.04134 - 159.3 4 - 0.2043 - 41,740 - 0.03278 - 126.4 5 - 0.1819 - 33,100 - 0.02600 - 100.2 6 - 0.1620 - 26,250 - 0.02062 - 79.46 7 - 0.1443 - 20,820 - 0.01635 - 63.02 8 - 0.1285 - 16,510 - 0.01297 - 49.97 9 - 0.1144 - 13,090 - 0.01028 - 39.63 10 - 0.1019 - 10,380 - 0.008155 - 31.43 11 - 0.09074 - 8,234 - 0.006467 - 24.92 12 - 0.08081 - 6,530 - 0.005129 - 19.77 13 - 0.07196 - 5,178 - 0.004067 - 15.68 14 - 0.06408 - 4,107 - 0.003225 - 12.43 15 - 0.05707 - 3,257 - 0.002558 - 9.858 16 - 0.05082 - 2,583 - 0.002028 - 7.818
