Originally Posted by gmcf2004
Breaker keeps tripping. Everything is wired per wiring diagram as far as I can tell. This was done by an electrician and even he could not figure out why the breaker trips. I am a novice but the panel box in my garage has a 40 amp breaker. The GCFI at the tub is 50 amp. Would this cause the breaker to trip?
Would only be the cause if the tub requires a 50 amp branch circuit in which case the is the possibility the 40 is too small.. But you don't give enough details....it's all in the details....
Which breaker is tripping? The 50 gfci or the 40 in the house main panel.
Is the breaker tripping instantly as soon as the spa starts or calls for heat or motors start.
Is the tub 3 wire 220 or 4 wire 120/240?
Does the tub require a 50 amp branch circuit ?
As JBfan said new or old hot tub?
Edit: as JBfan is saying a 'real electrician' should be able to determine if the electrical supply is correct and connections are correct or any faults exist with the wiring or devices. If the tub is at fault he should also be able to determine that...maybe not exactly what is at fault with the tub but he should be able to tell you if it is the tub or not... at the least.