SNations Posted October 1, 2011 Report Share Posted October 1, 2011 Is there ever a legitimate reason to have a 30A 120V circuit? It's my understanding that 30A is allowed for "fixed utilization equipment" (and obviously I see 30A 240V all the time) but I can't think of any equipment that uses 30A on 120V. Is there anything like that? In the case I saw yesterday it was clearly an attempt to get more juice out of the six circuits supplying a 1400 square foot 3 bedroom duplex. Quote Link to comment Share on other sites More sharing options...
Phillip Posted October 1, 2011 Report Share Posted October 1, 2011 First thing is WATS size wire was on the breaker? It needs to be at lest a number 10 copper. I use a 30 amp breaker for my wire welder that 110 volt. Might be for a window unit. I don't know why it would be on 6 circuits in a house or duplex. Quote Link to comment Share on other sites More sharing options...
Douglas Hansen Posted October 2, 2011 Report Share Posted October 2, 2011 Is there ever a legitimate reason to have a 30A 120V circuit? It's my understanding that 30A is allowed for "fixed utilization equipment" (and obviously I see 30A 240V all the time) but I can't think of any equipment that uses 30A on 120V. Is there anything like that? In the case I saw yesterday it was clearly an attempt to get more juice out of the six circuits supplying a 1400 square foot 3 bedroom duplex. I've seen a few built-in vacuums that required a 30-amp / 120-volt circuit. Obviously a different situation than your 3-bedroom duplex. Quote Link to comment Share on other sites More sharing options...
Jim Port Posted October 2, 2011 Report Share Posted October 2, 2011 RV outlets are typically 30A/120V. Quote Link to comment Share on other sites More sharing options...
plummen Posted December 10, 2011 Report Share Posted December 10, 2011 Id say its very uncommon to see a 30a 120v circuit these days,unless its from an old window ac as stated previously Quote Link to comment Share on other sites More sharing options...
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