FIRST OF ALL If your overcurrent protection device (circuit breaker) is a 30 amp, YOU CAN NOT USE NO 12 20 AMP RATED WIRE, the wire isn"t sufficiently protected!!! The breaker will allow 30 amps to flow while the wire only has a 20 amp ampacity!!!!!!!!!!!!such a configuration would allow the wire to heat up greater then permitted.
If your load allows the use of 12 gauge wire, then you would need to protect it with a 20 amp overcurrent protections device NOT A 30
NEXT if the load draws 24 amps, then you would use a wire that has at least 30 amps ampacity as 24 is 80% of 30..........
Now that the wire size (10 gaube) is selected based upon the load, you need to protect it with a 30 amp breaker
SOOOOOOOOOO the 30 amp breaker is fine but you need 10 gauge wire
The voltage rating of a wire is NOT the same as its ampacity. Just because youre at 240 volts you still need wire of sufficient ampacity to handle 24 amps AND THATS NO 10
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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