I have a hot tub for about 6 years. The wiring from the hot tub to the gfi circuit breaker was about 30 feet. Everything was fine. Recently I moved and brought the tub with me. The wiring from tub to breaker is now about 100 feet. I used #6 wiring. The original circuit breaker was 50 amps. When the pump is on high, the breaker would trip. I thought it was possibly because of the longer run. I installed a 60 amp gfi breaker and that also trips. The pump runs for about a minute before the breaker trips. Any thoughts?