GFCIs work by constantly monitoring the amount of current running through a circuit. The instant that the current level returning from the circuit drops below the level going out – which could indicate that the electricity is escaping to the ground, possibly through a human – the GFCI t...
A receptacle tester with GFCI circuitry can identify reverse polarity wiring. Changes to that wiring should be made by a electrician. When remodeling work is complete and power is restored, conduct a few basic tests to ensure that switches and outlets are in working order. Use the receptacle te...
How to choose the right type of electrical receptacle when adding or replacing a wall outlet in a building.Here we describe matching 15-Amp receptacles to 15-Amp circuits, 20-Amp receptacles to 20-Amp circuits, two-wire receptacles where no ground is present, GFCI and AFCI electrical ...
Roy Berendsohn has worked for more than 25 years at Popular Mechanics, where he has written on carpentry, masonry, painting, plumbing, electrical, woodworking, blacksmithing, welding, lawn care, chainsaw use, and outdoor power equipment. When he’s not working on his own house, he volunteers...