Knob and Tube Wiring: Is It Dangerous in an Older Home?

Cracked ceramic knob and tube wiring insulator with cloth-covered wires inside a wall

Knob and tube wiring is an old electrical system from the 1880s to the 1940s that holds single wires in open air on ceramic knobs and tubes. It is not banned, but it has no ground wire and it was never built for modern power loads. If you are shopping for a home built before […]