Why Replace Knob and Tube Wiring

From the 1880s to the 1930s, knob and tube wiring was the standard electrical wiring system used in most North American buildings. Designed as an open-air system, the single-insulated copper conductors ran through walls or ceilings and were supported by ceramic knob insulators, which served to separate wires from combustible framing. Today, however, knob and…