Was it in a panel like this? Thankfully mine just went to a temporary breakout box and I only had to replace a gfi. 99% of the time the line lugs are the same height so out of habit while in a hurry I Ianded the feeders in the wrong spot. Glad the gfi would’t set so I noticed something was up. Hypothetically speaking of course.🤣
It was a small Square D sub and I got neutral and a hot reversed. I was half asleep and working stupid hours. I watched the insulation on a branch circuit neutral bubble and burn back about 6” before the breaker tripped. It was a bad day. I fried the circuit board in a water softener ( I got lucky and found a new one on short notice).
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