What gauge wire do you use for a 20 amp circuit?

Answer 1

The NEC table 310.16 does not go that small. If there is a code requirement in your location, you must follow it.

Otherwise, a recommendation I found suggests 11A for short in-chassis wiring, and no more than 1.5A for longer power distribution wiring.

With wire this small, your current will probably be limited more by maximum permissible voltage-drop than a safety rating.

Answer 2

For a 20 amp circuit, it is recommended to use a 12-gauge wire. This wire size is able to handle the current flow required for a 20 amp circuit while ensuring safety and efficient operation. Be sure to consult local building codes and regulations for specific requirements in your area.

Answer 3

The electrical code does not go smaller than a #14 wire which is rated at 15 amps.

....

Reading the ARRL Handbook, 1970 version, page 526, the Copper Wire Table,

indicates that a single conductor of 18AGW wire in open air can handle 16A, but bundled or in conduit 10A should be the maximum.

Remember, safety is YOUR responsibility.

Answer 4

The electrical code book does not supply amperages for wires below a #14 wire. A # 14 wire is protedted by a 15 amp breaker. Smaller size wires need their own protection depending on what the load amperage is.

Answer 5

I cannot find 22 gauge wire on any chart in the NEC. That must be a speaker or signal wire for which ampacity is not usually a consideration.

This is speaker wire and it can carry no more than .92 amps.

Answer 6

20 gauge copper wire can carry 1.46 amps. Insulated copper wire can carry 6.5 amps. This is assuming a short run of 25' or less.

Answer 7

12 gauge