All these things can be major fire hazards. Add in the potential for deterioration due to age (sagging wires, fraying or crumbling insulation around the conductors, etc.), and some insurance companies ...

Q: You have written that it is not possible to insulate over older knob-and-tube wiring in walls and attics. Many states have adopted amendments to NEC 324.4 to allow for exactly this practice. The ...

I thought I'd finished with writing about knob and tube wiring, but readers raised a couple of good points this week, so I'll go one more time. Knob and tube is the earliest of the electrical wiring, ...