NEMA 14-30R (not 14-30P) to TT-30R?
My garage currently has a 14-30R (not 14-30P) 125/250V receptacle. Is it possible to rewire this to a TT-30R 125V receptacle? I can't seem to find an adapter anywhere.
Forum Discussion
DubV wrote:
Thank you Gents. I assuming the double pole breaker takes 240v to trip vice the single at 120v?
Until I can get my hands on a disconnect, Could I just flip the new breaker after its hooked up?
A breaker is (generally speaking) not sensitive to voltage at all. It's an overcurrent protection device—it senses the current flowing through it, and trips if it is over the rating, regardless of the voltage. Traditional breakers don't have any neutral connection so don't have any way of sensing the voltage.
A dual pole ("240V") breaker will trip when either pole has current beyond its rating, and shut off both sides at the same time. It's basically just two single pole breakers physically attached to each other.
Circuit breakers do have voltage ratings based on how high a voltage they can safely disconnect (and are designed to disconnect), and how strong their insulation is, and what sort of wiring they're approved to be used for...but that's not inherent in their operation. Modern circuit protection devices like GFCIs and especially AFCIs are more complex, too, and some of them may actually sense and trip for abnormally high voltages absent of overcurrent—I'm not sure on that.
