tracking power feed short to switch

[diygiy]

120v household line. Feed line suddenly lost power. Tenant reports no heavy usage at the time - says she just finished a shower so possible condensation/steam issue caused the short. one gfci in bathroom works fine, no load on gfci just a direct 12-3 yellow feed line into gfci no load out (appears only bathroom is on bathroom circuit breaker). Double switch box is the problem - first switch controls bathroom fan and shower light. Second switch controls vanity light. Seems main power feed from the "wall" is dead (tested with volt meter and main feed line to switch box is dead). No other outlets or switches seem to be on bathroom breaker (all other outlets & switches in apartment work)

I have a few options to get power to the switch box - but my question is how best to track the short in the line? AFAIKnow, since gfci works, energizing from the breaker side will tell me know more than i know now. Is cutting sheetrock the only sure way to track the short location? I would try looking for lower resistance but only the gfci and the double switch seem to be on the circuit. Any suggestions i appreciate - thank for taking time to read my post

 

[Octopus]

Where in the world are you?

 

[Pete999]

Where in the world are you?

Over the Pond, Septic Land of the free, Trump Land.

 

[MJPD29]

This sounds very american. Out of interest what is a 12-3 is that a cable size?

 

[Resu]

This sounds very american. Out of interest what is a 12-3 is that a cable size?

12 gauge 3 core

 

[Pete999]

120v household line. Feed line suddenly lost power. Tenant reports no heavy usage at the time - says she just finished a shower so possible condensation/steam issue caused the short. one gfci in bathroom works fine, no load on gfci just a direct 12-3 yellow feed line into gfci no load out (appears only bathroom is on bathroom circuit breaker). Double switch box is the problem - first switch controls bathroom fan and shower light. Second switch controls vanity light. Seems main power feed from the "wall" is dead (tested with volt meter and main feed line to switch box is dead). No other outlets or switches seem to be on bathroom breaker (all other outlets & switches in apartment work)

I have a few options to get power to the switch box - but my question is how best to track the short in the line? AFAIKnow, since gfci works, energizing from the breaker side will tell me know more than i know now. Is cutting sheetrock the only sure way to track the short location? I would try looking for lower resistance but only the gfci and the double switch seem to be on the circuit. Any suggestions i appreciate - thank for taking time to read my post

I think you may get more help diygiy if you ask your questions in an Americak electrical Forum, although many of the Electricians on here are qualified and experienced they may not be familiar wth the US system, anyway good luck hope you get your problem sorted.

 

[LankyWill]

canduit

 

[Pete999]

canduit

Not really helpful for the OP Will, anyway it's Raceway

 

[LankyWill]

Not really helpful for the OP Will, anyway it's Raceway

What’s raceway?