I was going to change a light switch and repair some wall damage. When I started opening up the wall above the switch, I saw the electrical wire clamped to the studenter image description here. I noticed black marks around it. Does this look like it might be a fire hazard and need an electrician. Personally I think so but I want to get some other opinions.

1 Answer 1


Yes it is. You are correct. Call in an electrician.

  • 1
    If you think you're up to it, you can do a new run of wire yourself. Lots to consider for that operation, though. May 30, 2016 at 15:41
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    @bib, that absolutely did NOT catch fire. What we are seeing is the tar from the cable. I've seen it a thousand times. May 30, 2016 at 17:38
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    @AloysiusDefenestrate: considering the age of the cable, there is likely much much more to repair, and its probably a good opportunity to do it all at once, which might be too much for him personally to diy.
    – PlasmaHH
    May 30, 2016 at 19:29
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    @AloysiusDefenestrate the problem is that electrical engineering is one of those things that can cost lives if done improperly. I really would hesitate to recommend someone do electrical work themselves without proper training. I mean, small things like replacing an outlet cover is something that a layman can do themselves without much issues, but anything like replacing an in-wall cable or adding new outlets really requires a professional. There's a reason that "electrical fire" returns over a million hits in Google News, and it's probably not incompetent electricians.
    – Nzall
    May 31, 2016 at 10:48
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    A cable that has been damaged enough to have a hole in the jacket is not unlikely to also have a reduced conductor cross section in that spot. Which translates to a great fire hazard. May 31, 2016 at 11:05

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