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PROBLEM: Our old house has knob and tube wiring. Is it safe?

May 23, 2017


SOLUTION: Knob-and-tube wiring has cloth wrapped wires running through distinctive ceramic tubes, soldered and taped at junction points, and insulated from contact with structure by knobs.  This was standard electrical installation technology through the 1930’s.

The system is sound when intact, but age, improper junctions and worn insulation around wires contribute to the potential for fire.  This system was ideal when it was originally designed to hold modest currents, but modern electrical demands for the average house are considerably greater. The best course is to have your wiring inspected and circuits tested to rule out any loss of current.  This could indicate a hidden dangers inside the walls of your old house.

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