## How many amps can a 4 gauge wire handle?

Wire Size and Amp RatingsWire Size75°C (167°F)AWG(mm²)Copper6(13.3)654(21.2)853(26.7)10017 more rows

## Can 4 gauge wire handle 50 amps?

For a 50 amp aluminum wire, you should use the No. 4 AWG. The smaller sized the number on the wire is, the larger the wire size. 6 is only usefully good up to 40-amp.

## Can I use 12 gauge wire on a 20 amp circuit?

A 20-amp circuit, protected by a 20-amp breaker or fuse, must be served by 12-gauge or 10-gauge wire.

## Can I use 8 gauge wire on a 20 amp circuit?

The rule of thumb that techs will usually go by is that for a 30 amp circuit breaker, 10-gauge wire is the right size to go with. For a 40 amp you need a 8-gauge wire size and for a 20 amp, you will need a 12-gauge wire size.

## Which is bigger 2 AWG or 4 AWG?

The bigger the AWG number, the smaller the physical size of the wire. An AWG of 40 is the smallest and 0000 is the largest. For every 6 gauge decrease, the wire diameter doubles and for every 3 gauge decrease, the sectional cross area doubles.