Q. I have to rewire an old home that has well-maintained plaster walls throughout. I'd like to do this without gutting the interior. Any tips for wire-snaking?

When rewiring an old house, I'll wire the first floor by working up from the cellar (Illustration A), then run a few feeds up to the attic and wire the second floor by working down from there, using drill bit extenders, fish tapes, and a tone generator as needed. It's usually easy to find interior wall top plates in the attic just by moving...

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