I have a home from the 1850s. Mixed knob and tube with parts that are updated romex. I lost power to 1/3 of the rooms. Power is coming in from the outside to box, from box to breakers, and out from each breaker. Have tested each outlet and fixture in the house and those that work are obviously hot and those that are not are receiving any electric. Didn't finish my electrical map when we moved in so not sure how many breakers the trouble lies on. Have check all GFCIs and that is not the issue. Any advice? Guidance?

  • Do you have an electric stove or oven? Turning a burner on high does it get red hot like always or does it seem to not get as hot?
    – Tyson
    Jan 7, 2017 at 19:18
  • Hi! I have gas. All appliances work as normal and consistent prior to the power being dropped. Jan 7, 2017 at 19:30

1 Answer 1


Many homes of this time frame had very few individual circuits and as you have found a mix of old and new wiring. With a large section not working it may be as simple as 1 conductor at a junction has failed. Tracing this may take quite a bit of time and or special equipment. I use a Greenlee CS 8000 circuit tracer it has a self powered transmitter that you can trace the wires through the walls and will locate the failure point. These are fairly expensive but you may be able to find a used one or factory second at a reasonable price but a tool like this may be a good one to have for future problems also. The CS 8000 works on both live circuits and dead. Other than that it will take tracing the wires back and the failure point could be in a wall or enclosed space the cs8000 will pinpoint it within a few inches.

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