Knob and Tube Wiring - Pillar To Post
2019-1-29 · Knob and Tube Wiring The oldest residential wiring is called knob and tube wiring. Ceramic knobs support individual strands of wire along their run and ceramic tubes protect the wire where it passes through wall studs or floor joists. Knob and tube wiring was state-of-the-art up until around 1950. If not abused or tampered with, knob and
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