How far can you run a 14 gauge electrical wire?

Answer 1

You can run it as far as you want, knowing that the farther you go, the more voltage drop will occur under load. If you have a very small load, you can run 14 AWG for hundreds of feet.

For instance, 14 AWG copper THHN 90C in conduit with 3 percent voltage drop would get you over 600 feet at 1 amp, but only about 50 feet at 15 amps.

Answer 2

10 AWG has a resistance of .1 ohms per 100 feet. As a rule of thumb you want less than a 10% drop in voltage because of wire. You use Ohm's Law to calculate the allowable drop. Volts = Amps x Resistance. The maximum amps for 10 AWG is 30 for typical household applications. So for example a 120 volt circuit could drop only 12 volts because of wire length (this is worse case) so R = 12/30 = .4 ohms. So dividing the .1 per 100 ft the result is 400 feet. For most applications I would recommend only about 250 ft.

Answer 3

Around 75 feet is all I would run it. The NEC recommends you never run the wire so that you have a voltage drop of over a 3.6 volts. If the run is over 75 feet then I would switch to 12 gauge on a 20 amp breaker just in case of a brownout of heavy load applied to that circuit. You cannot go wrong running 12 gauge but you can running 14 gauge.

Answer 4

Depends on voltage and the length of the wire. The longer the wire, the more resistance, the more heat generated, etc.

Answer 5

65’