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Unexplained isolated circuit outage but circuit never tripped

Christopher Bruce
3 months ago

This morning my wife found that the power was off in our bathroom. I found that power was also off in my daughter's room, including her breathing equipment was in battery mode. For some reason I tried unplugging her pulseox equipment (which is old) and everything instantly came back on (including oxygen concentrator which was on the same outlet), plus power was restored to the bathroom. The circuit breaker never tripped. I'm assuming the pulseox was the culprit, but how did it cause power to stop going to everything else on the circuit? Shouldn't the breaker have tripped? No wires or outlets seemed hot to the touch.

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