As such, 10 gauge wire is not suitable for long runs, and if you are planning to run your wiring over 150 feet, you will probably need to upgrade to an 8-gauge wire. Ten AWG wire has a resistance of one ohm per 1000 feet, which is significantly higher than that of forty AWG wire. However, you must also account for the 80% rule, which means that you need to purchase a wire that is at least eighty percent larger. Because #10 AWG wire is rated at 35A, it can handle up to 30 amps. Essentially, every hundred feet away from the sub panel, an increase of 20% in wire ampacity is required. The NEC 310-16 code specifies the size of wire for 30 amp service when it is a hundred feet or more away from the sub panel. How far can you run 10 gauge wire for 30 amps? This is a rule of thumb that can be used to determine the right size for a circuit wire. For example, if a wire is 100 feet from a sub panel, it should be a size of 10 AWG (AWG). For each 100 feet of distance from a sub panel, wire size must increase by 20%. The NEC 310-16 Code dictates the size of wire for a 30-amp service. The following article will discuss the right 30 amp circuit wire size. The NEC wire chart provides the proper wire gauge for a circuit breaker. A thicker gauge wire is preferred for more demanding circuits. The wire size is determined by the breaker size and the wire gauge, and it may also include a ground wire. The proper 30 amp circuit wire size depends on the load that it is supplying.
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