I installed a dedicated 50amp circuit for a hot tub about 5 years ago and it's always worked fine. The customer called me and told me that everytime the hot tub is running and someone turns on a vacuum,trash compactor,or other appliances it trips the GFCI hot tub breaker I installed. I asked him if anything had been done and he said a hot tub serviceman installed a new pump and it's been happening since then. He had a friend replace the GFCI breaker, same problem occurred. As long as nothing else is turned on the hot tub works fine. He has had PGand E out and they say their stuff is fine. Anybody have an answer?