I have a customer who has had a Hot tub wired, and told the electrician to pull big enough wire to be able to wire pool pump motors etc. in the future. I come out to the job and he has # 6 or # 4 wire pulled to a 4 circuit panel, with a 60 amp. GFI breaker feeding the hot tub. In order to find out if this feeder is big enough, I will have to know what size motor is in the hot tub, the motors for the pool, then add 25% for the largest motor, then add the load for the heaters on the hot tub, and the load that will be pulled by the pool light. They want 2 outlets also. Are these outlets to be figured at 180 volt/amperes per outlet? Thanks... Steve Also when figuring the feeder for a dual voltage motor, don't you have to calculate according to the highest amp rating to determine the wire size for the feeder? Thought I read this somewhere in the code, but can't seem to find it. Thanks again .. Steve
You have to use the "high speed" rating of a 2 speed pump unless there is some kind of interlocking. I think some package spas interlock the heater and high speed of the pump but they are usually the 120v setup of the spa.
#101468 - 03/23/0704:17 PMRe: Wiring pool off Hot tub panel
gfretwell, I don't think you understand exactly what I was asking. I'm not dealing with the hot tub only, but with the swimming pool pumps also. But that is a help anyway. Does anyone know the code reference for calculating the highest amp rating for the feeder size? Thanks Steve..
#101469 - 03/23/0707:11 PMRe: Wiring pool off Hot tub panel
Most of the pools I do are for 120/240 and 14/7 amps. The pool light if low voltage is 2 1/2 on the primary side of xformer. You need one circuit for the pool pump and one circuit for the pool light. The pool heaters we use are gas. Hope this helps.
#101470 - 03/23/0708:03 PMRe: Wiring pool off Hot tub panel
gfretwell, When taking the pool pumps, do I take the FLA at the higher amperage at 115 volts, or do I take them at 230 volts where they will be operating at, and do you know the code reference? Thanks Steve..
Greg, thanks for the info. I don't know where I got that you have to figure the feeder on the highest rating. One of them things that somehow got stuck in my mind I guess. One thing for sure, the feeders certainly will be big enough on some of the past jobs I've done:)
If your equipment is tight I doubt you will leak enough to trip the GFCI. Finding the bad part might be hard if you do get nuisance tripping once in a while tho. The GFCI that feeds my outside lights around the pool and patio is one of those things. It feeds 6 motion detectors, a couple receptacles, a dimmer and over a dozen luminaires. When this one trips I have a challenge.