I have an electrician who happens to be in Europe until the end of June. I had a questions I'M hoping someone could help me with. (mainly just for my own info)
In looking at the NEC 680 code I'm a bit confused. I'm guessing it may be spelled out in other places in the code).
My existing pool location and wiring (inspected / approved) utilized THWN in PVC (Gray) conduit burried 24+" deep. THWN dedicated line for the pump as well as a second "line" for the convienence outlet (also THWN) along with an insulated (Green Jacket) ground.
I've done some grading for the new pool install and essentially, my 15x33 A/G pool will be "in-deck" now. Just so I know everything is new, I was going to re-trench and re-run all new wiring (I also wanted to slightly change the location of the filter since this current pool is a bit larger than the last one).
Here is my question:
Since my pool is now "built into the deck", can I run the THWN in conduit under the bottom of the deck (along the joists) to the pump and convienence outlet?? (which will now be all under the deck) - These would of course be 2 dedicated lines.
I could easily bury the new conduit, no problem at all, but due to the location, when the wiring comes out of the house, I could either run conduit appx 3 feet down to ground level and then burry 24". But then I'd have to come "up" out of the ground appx 3 feet to the "outlet post" for the pump and for the convienence outlet.). That seems a bit odd to do (at least to me).
Where.... if I run along the deck joists, I can come straight out of the junction box on the house (under the deck now) and just "drop down" to the outlet boxes. (one twist lock for the pump and the other for the convienence outlet).
Looking at the code It appears that even though I'm not burrying anything, I should still use conduit with THWN (as opposed to UF-B not in conduit). - (At least where the pump is concerned).
One electircian told me to use UF-B along the deck for both since I'm not burrying anything but looking a the NEC 680 code, the info he gave me appears to be incorrect information. (That's why I'd rather wait for the other electrician).
From what I see (at least for the pump dedicated line) it should be THWN etc in conduit with a separate #12 Green Jacketed ground wire).
Any input would be great.
Right now, I'm planning to run new conduit and THWN under ground but if I can run along the deck joists, that would make my deck pier installation a bit easier since I won't have anything in the ground.