![]() But a smaller gauge will burn your house to the ground. The breaker can still respond to the current passing through a large wire before the wire overheats. In other words, the current running through the circuit is high enough to cause overheating in the thin wires but too low to trip the breaker.Īs such, if you want to change the breaker in your house, you must also change the wiring. If the wire size is smaller than the breaker size, the wires will overheat and melt, and the breaker won’t respond because it has to detect more current than the small wire can carry to trip. This is the reason why the size of the cables has to match the size of the breaker. If the wires carry more current than they can handle, the breaker will trip to prevent them from overheating. SIze Of Wire Has To Match The Size Of The Breaker If you have a large breaker that can accommodate large volumes of electricity, you need an equally large wire. But it carries less electricity than an 8-gauge wire. This is why the gauge is so important.Ī 10-gauge wire carries more electricity than a 12-gauge wire. ![]() In turn, the size of a wire tells you the amount of current the wire can safely carry. Lower AWG Is BetterĪs you now know, the gauge determines the size. To identify the correct wire size for a 30A breaker, you have to keep a few factors in mind, namely: 1). How Do I Determine The Correct Wire Size For 30 Amp Breaker? 200 Amp Service Ground Wire Size(Installation, Buying Tips).Can I Replace A 30 Amp Breaker With A 40 Amp?.NEC expects consumers to use 10-gauge wire for 30 amps regardless of whether the material is copper or aluminum. In that regard, you could argue that 10AWG is the minimum and 8AWG is the maximum. Many professionals agree with this assessment. In some locations, the local authorities expect consumers to use wires ranging from 8AWG to 10AWG for 30A breakers. The use of a thicker wire does not attract any dangerous consequences. The lower the number, the bigger the wire. The higher the number, the smaller the wire. This is why many professionals emphasize the minimum gauge for a 30A wire, but they don’t say anything about the maximum gauge. A small wire with an inadequate diameter will start a fire. The main objective is to ensure that the wire is large enough to match the breaker’s capacity. What Size Wire is Needed For A 30 Amps Breaker?Ī 10-gauge wire can safely carry the current of a 30A breaker. ![]() In fact, unless you have experience in the electrical field, you should leave these decisions in the hands of a professional. The wrong wire size can destroy everything you own. Before you install the breaker, you must first select wiring of the correct size.
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