A Spa is wired from a 50 A disco that was supplied with the spa. The disco contains a two pole 30A GFCI breaker for the motors, lights and controls. It also contains a two pole 20A GFCI breaker just for the heater, which is only a line to line load.The 30A breaker has a load side neutral to the spa. The 20A breaker for the heater has no load side neutral, just a line side one to the neutral buss.
The instructions specify which terminal in the spa to land each of the four hot conductors by phase. In other words, you need to identify L1 and L2 of the motor leads from the 30A breaker and L1 and L2 of the heater leads from the 20A breaker and connect them to the specified terminals on the spa.
If the installation was made and the 2 legs of each circuit were landed at random (The two circuits not being mixed up, just L1 & L2 reversed on one of them), could this cause a malfunction of the heater GFCI? Could it also damage the GFCI?
I cannot figure why it would matter if the the two hot legs were interchanged on either circuit.
I will greatly appreciate any help on this matter.
Thanks, Brian Winkle