Knob and tube wiring, usually abbreviated to K&T, is a form of electrical system that was in common use prior to about 1950. K&T gets its name from the knobs and tubes used to run electical cables through a house. In a K&T system, the wires run through a series of porcelain cylinders (the tubes) in the floor joists.
Feb 6, 2024
Knob-and-tube wiring (sometimes abbreviated K&T) is an early standardized method of electrical wiring in buildings, in common use in North America from ...
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Knob-and-tube (K&T) wiring was an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1940s.