To find the 100A wire size, look above for 6 AWG. AWGĪwg amp chart, wire size amp chart, awg current rating, copper wire size chart, wire size table. Aluminum is however problematic as there is issues with corrosion near moisture, it cracks easily when bent and electrolytic reactions between aluminum and copper. As a quick rule of thumb, using aluminum wire, only has half the current capability of copper, or you can say that you have to use a larger wire, that is twice as big as it should have been with copper. The calculated skin depth is where the entire wire is conducting current, higher frequencies are possible if the application can operate with current only flowing in the outer layers of the bare copper wire. Circular mils and wire diameter is given with current carrying capacities so you can choose the right gauge number. This is a wire chart combined of American Wire Gauge AWG (Chassis Wiring, single free hanging wire) table from national electrical code and the European standards for machine wiring at +40 oC, EN 60204-1.
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