Hey Guys, I have a double 20 amp breaker that is connected to each other. I have one side running the kitchen and one side running the washing machine in the garage. I was told this is a standard practice, however, I have a portable hot tub that I use in my garage that I only use when not using the washing machine. The hot tub is plugged into a GFCI outlet located about 5 feet down the wall off the washer receptical that was installed before I moved in.
Here is the big problem, I have just noticed a piece of conduit that comes off the furnace that was buzzing, getting hot and it stopped after turning off the hot tub, the other day I was running items from the kitchen and the conduit got so hot it was burning paint off the wall. I shut off the double 20 amp breaker and it cooled down. It now gets hot with that breaker off and running a space heater upstairs that is on another breaker. I have the breaker off on the furnace and am stumped to what is going on or how this my be wired. The conduit going to the furnace goes to a junction box on the wall that has some sort of relay on the top of it. Any help would be great. Thanks