Okay so I got a weird one. Plugged in the wife's block heater on her car and the breaker blew. Went downstairs and realized what is here cannot be right. Looks like a single pole 30A GFCI breaker feeding a 4 circuit sub panel. On that panel is a multi-wire branch circuit feeding the garage outlets.
The main GFCI breaker trips the second I plug the block heater in with anything else on that MWBC.
From my understanding, the sub panel would have to be feed by a double pole GFCI breaker for this to work, right? What's the easiest way to fix this at the panel or at the outlets without needing to run new wire? Would the double pole GFCI be a good idea or should I be replacing that with a standard breaker and going to GFCI outlets? Was the setup as it is now ever legal in Canada? The house is from 1979/80, but this was probably done after that.
Thanks!
The main GFCI breaker trips the second I plug the block heater in with anything else on that MWBC.
From my understanding, the sub panel would have to be feed by a double pole GFCI breaker for this to work, right? What's the easiest way to fix this at the panel or at the outlets without needing to run new wire? Would the double pole GFCI be a good idea or should I be replacing that with a standard breaker and going to GFCI outlets? Was the setup as it is now ever legal in Canada? The house is from 1979/80, but this was probably done after that.
Thanks!