The term ampacity comes from ampere capacity. this means capacity of amperes of a wire which it can carry. Proper definition we can make is the ability of any wire to carry out the current in amperes is called ampacity of that wire.The ampacity of wires changes with size and voltage and also material of wires. Copper wires have more ampacity than aluminum or any other metal.
Some details are as below:
Wire Size (AWG) Copper conductor (A) Aluminum Conductor (A)
14 20 ….
12 25 20
10 35 30
8 50 40
6 65 50
4 85 65
2 115 90
1 130 100
1/0 150 120
2/0 175 135
3/0 200 155
4/0 230 180
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