knob-and-tube wiring


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knob-and-tube wiring

[¦näb ən ′tüb ‚wir·iŋ]
(electricity)
An electric wiring method used for light and power circuits that uses open insulated wiring on solid insulators; now obsolete and illegal in most countries.
References in periodicals archive ?
Knob-and-tube wiring passed through holes cut in joists.
Also, exposed knob-and-tube wiring (a key feature of the garage, and crucial to historical accuracy) had to be preserved.