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.
Re: Wiring pool off Hot tub panel#101468 03/23/0705:17 PM03/23/0705:17 PM
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..
Re: Wiring pool off Hot tub panel#101469 03/23/0708:11 PM03/23/0708:11 PM
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.
Re: Wiring pool off Hot tub panel#101470 03/23/0709:03 PM03/23/0709:03 PM
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.