A line of assembled plugs and receptacles come in three- and four-conductor versions. The parts terminate to twist-lock power cords, and meet a variety of NEMA requirements including L5-15, L5-20, ...
We just got our new UPS in and it has a 120v 20Amp NEMA 5-20P plug on it. Our outlets are 120V 15Amp NEMA 5-15P. My question is: Is an adapter plug a bad idea? Or should I have an electrician come in ...