Ampacity

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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