Home Safety: Answering Your Questions About Knob & Tube Wiring

May 21, 2013 by Valerie Griffiths

What is knob and tube wiring?┬áKnob and tube wiring consists of insulated copper conductors passing through lumber framing drill-holes via protective porcelain insulating tubes. They are supported along their length by nailed-down porcelain knobs. Insulation (or loom) was used to protect the conductors where they entered a lamp or switch, or passed through a wall. […]

Category: Electrical safety
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