Electrician Talk

An Overview of Knob and Tube Wiring

This article is a guest post supplied by ElectricalSchool.org. We thank them for their contribution. Knob and tube wiring was the standard for electrical wiring in homes built between the 1880s and 1940s. The system consists of copper wiring that passes through porcelain-protected tubes throughout holes drilled into support beams. The wiring is supported by …

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