Knob-and-tube wiring is an early method of electrical wiring used in buildings, primarily from the late 19th century to the early 20th century. This system consists of individual wires that are run through ceramic insulators mounted on wooden knobs (the "knob" part) and secured with straps or staples. The wires are typically insulated with rubber or cloth, and they run through walls, ceilings, and floors to distribute electrical power.
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