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Not sure of circuit size size other than what's on the circuit breaker at panel box.  There is only one receptacle on the line.  Is there harm in going ahead and purchasing 20 amp GFCI? I had already planned to install a new box.  
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Posted 2016-05-05T00:16:50+0000  by CBos CBos

Hi CBos, welcome to the community. When it comes to your electricity in your house, you will want to match your wire gauge, breaker and outlet to be the same. You want this so if you have a spike on your electricity line your breaker will trip and shut down so no harm will come in the way of a fire. CBos for a 20 amp breaker, you will want your wire to be 12 gauge, and your GFCI to be 20 amp.

Again thank you for joining the community, please come back with some of your other project questions. 

Posted 2016-05-05T15:33:40+0000  by Ken_HD_OC
Hello CBos.

It's the wiring in a circuit that determines the maximum amperage rated circuit breaker that can be used in a circuit.  Fourteen gauge wire can safely handle a 15 amp load, so that would require a 15 amp circuit breaker, and no larger.  Twelve gauge wire can handle 20 amps, and so either a 15 or 20 amp breaker could be used.  The breaker protects house wiring from being overloaded and potentially starting a fire.

It makes sense to match the receptacles on a circuit to the maximum load that circuit can handle.  If you put a 20 amp receptacle on a 15 amp circuit, no harm would be done, but that receptacle will allow higher load items to be plugged into the circuit than it can handle.  This will result in tripping the breaker.  It also violates building codes.  There is no good reason to do this.


Posted 2016-05-06T15:15:25+0000  by Chris_HD_CHI
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