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Question about a weird voltage drop in a 1970s house
I was rewiring a kitchen in an old house in Boise last month and hit a wall. The lights on a new circuit kept dimming when the fridge kicked on, but only in the afternoon. Spent a whole day checking connections, the breaker, even the new wire. Finally, after about 7 hours, I found the issue. The original feeder cable from the meter to the main panel ran right through an uninsulated attic space. The afternoon sun was heating the cable up so much it was causing resistance and a voltage drop under load. Had to reroute about 20 feet of conduit to get it out of the heat. Has anyone else run into something like that where the problem wasn't the work you did, but something hidden from decades ago?
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