Working With Old Wiring
Careful testing is your hedge against frayed insulation, faulty splices and missing ground wires.
Synopsis: The author, a master electrician, details common wiring problems that may be revealed in remodels of older houses and explains how to remedy them. Testing equipment is crucial in identifying hazards that can pose serious safety risks to anyone working around old wiring systems. The author covers the basics, and explains when a qualified electrician should be called in for help.
He died. No joke. He was standing outside the house, next to a slab where the air-conditioning compressor sat. He wasn’t there to fix the compressor, just to paint some trim. Despite an internal short, the compressor worked just fine. But an additive in the concrete had corroded conduit running through the slab, so the compressor was no longer grounded. When the painter touched the compressor, 120v ran through him to ground.
Mostly, it’s 120v, ordinary household current, that kills people — not high-tension wires, not industrial…