Knob & tube replacement

Many owners first learn about their wiring when an insurer or a buyer asks about it. In an attic or basement, look for cloth-covered wires, porcelain knobs on the framing, and splices left open in the air. Older homes often have fuses, two-prong outlets only, or lights that dim when large appliances start. Insurers have been declining or canceling coverage on homes with this wiring, even when nothing has gone wrong. Insulation blown over these wires can trap heat around them, so an electrician should check before any more goes in.

The work starts with an inspection of the existing wiring, the panel and the household load. The electrician then maps which circuits need replacing. The plan goes to your city or county building department with circuit details and load figures. New wire is run and inspected before the walls close. Once connections are finished and tested, a final inspection confirms the work. Old wiring is removed, and any opened walls or ceilings are patched.

The biggest factors are the size of the home, the number of circuits, and how easily wires can be reached. Plaster walls take more time than open attic or basement runs. An older panel may also need an upgrade, often to 200 amps, to handle modern appliances. Standard homeowners policies usually do not pay for these upgrades, though some carriers offer premium credits after a documented rewire.

Full replacement requires an electrical permit. New circuits must meet current code, including grounding on every circuit and AFCI or GFCI protection where required. TopTech Electrical operates under California Contractor License #1138519, and the permit and final sign-off are the records you will want to keep for your insurer.