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Magrath

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  1. I got the issue fixed thanks to an electrician forum. Turns out the neutral is terminated on the neutral bus at the panel instead of in to the breaker. The breaker needs to be able to see the current looping on the control circuit. Just putting this hear for anyone else searching for this issue.
  2. TLDR: Control circuit is causing an imbalance in the main feed and tripping my GFCI. I'm having issues with the control circuit of my hot tub tripping the GFCI. I bought a used Beachcomber hot tub circa 2004 (name plate is missing) for $100 the plan to fix it up. I replaced the pumps and heating element but I am still using the original controller. After getting all the leaks fixed and pumps re-piped I turned the power on and the GFCI kept tripping. I started by unplugging devices to track down what was causing the short. Unplugging the step down transformer seemed to fix the issue. I got a new transformer but the problem still persisted. In my desperation to not replace the circuit board I ran an extension cord of 120v power to the transformer and it worked. So I turned my sights on to the GFCI. I then hypothesized that since the control circuit is being fed from one of the two pole legs that it is causing an imbalance that the GFCI is sensing and tripping. So I moved the feeds over to an empty 30A two pole breaker (yes it's undersized and will get rectified later) and finally got the hot tub fully working. Now I obviously need a GFCI feeding my hot tub. The hot tub isn't designed to have a separate 120v feed run to it for the control circuit so I don't understand how a GFCI is supposed to work in this situation. Could the hot tub pre-date the code rule for needing a GFCI feeding it? Is there something wrong with the controller itself? I'll probably run a 120v feed out to the hot tub and run the control circuit from that line so I can run my 240v wires back in to the GFCI. I'm wondering if anyone has encountered this issue on any hot tubs. I'm located in Canada. I'm also an electrician so you can use technical terms with me.
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