Power Out

Gandalf

I accidentally reversed polarity when I was using my table saw and the power went out on that circuit. The circuit breaker did not trip but the power is out. Also the power went out on three other circuits without tripping the circuit breaker. The rest of my circuits are working. Any idea what happened?

operagost

Maybe you tripped the master breaker on a subpanel?

Yoyizit

I don't know how you can reverse polarity on an AC circuit but I'd think a marginal wirenut or connection opened.
You may still get a voltage reading with no load on this circuit.

LyonsElecSupply

do you get voltage to ground on anything?

Speedy Petey

You want to explain to us what this means exactly.

NitroNate

yeah i'm confused too. with respect to A/C current, polarity doesn't matter, just phase.

AllanJ

Does a table saw have a reverse rotation, for example to unjam with?

Perhaps he meant throwing it in reverse without waiting for it to come to a stop.

Long long time ago, if a streetcar's brakes failed, the motorman might throw it in reverse to make an emergency stop. (Also called bucking the motors)

This usually causes a tremendous power draw at least for a moment.

__________________
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a7ecorsair

And phase only matters if there are three