I was preparing to install a ceiling fan in an existing ceiling box and ran upon something peculiar. The box did not have any light fixture in it when we moved in (obviously did at sometime in the past).
As there were 3 light switches in the room, I had the multimeter attached to the wires in the ceiling to see which switch (or switches) controlled the light. I found it, BUT, the voltage across the wires at the ceiling with the switch on was under 20 VAC.
I then opened up the wall switch to see what things were like in there. With the switch OFF, there was 80V across the switch terminals. 0V with it ON (as it should be). Weirder still is that there was 80V from the top terminal to ground, but 20V from the bottom terminal to ground (with switch OFF).
Is this just because of the open connections dangling in the ceiling? Before I hoist that ceiling fan up there and do all that work connecting everything, I wanted to double check.
fyi -- I am very careful around wires and only had the circuit breaker on because I was measuring voltages. Numbers may have been rounded slightly.
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