The reason I ask about the main, is because I'm installing a hot tub that has dual ratings, 30 amp and 50 amp circuit. The service size is 150 Amps, with a electric range, dryer and AC for major appliances. If I do a service calculation with the added hot tub load, I get 120 amps with the 30 amp hot tub load and 132 amp with the 50 amp hot tub load, so by using the service calculations, can I put the hot tub on the 50 amp circuit or does it have to go on the 30 amp circuit?
My inspector is telling me that the calculated load can't be more than 80 % of the main breaker, 120 Amps.
I see in the code book, on page 718 example D2c that the calculated load is 144.96 with a service
size of 150 amp.
I believe that I can add to this service as long as my service calculation are 150 amp or less.
Last edited by Sparky_1; 10/21/07 10:42 PM.