peaks
New Member
Hello,
I've been doing quite a bit of researching on this, but wanted to run by the board my plan and a couple of questions.
Background: House is a 1950s mid-century modern in San Diego; house is concrete block construction. I want to prepare for a hot tub at some point. Hot tub location would be near a 90A subpanel that has capacity (I did the load calcs). With some other remodeling going on, I have ok access to the panel and to where I'd exit the house with the wiring. Basically, it's a good time for me to run the inside of the house part of the wiring now and I"ll complete the outdoor portion later.
I plan to run a 50A GFCI circuit with 6/3 w/ ground NMB from the subpanel to where I'd exit the building (top plate above concrete block) and mount the spa disconnect (which is greater than 5 feet away from where the hot tub would be located). From the spa disconnect, I'd run 1" PVC conduit to where the hot tub would be located and eventually pull 4-wire 6AWG THWN.
My questions:
1) I know it would be better to run conduit even inside, but it's going to be pain to make that work. Can I use the NMB inside? There seems to be debate about whether this is acceptable due to whether to classify as a branch circuit or feeder given insulated ground issue.
2) Assuming I can use the Romex inside, what's the best way to transition from NMB to outside? I know NMB can't be used outside (even in conduit), but does the code that allows NMB to be inside of conduit for a short distance for protection allow me to take it down the spa disconnect inside a piece of 1" PVC conduit off a LB? Otherwise I assume that I'll have to put a big 6x6 waterproof junction box where the cable exits the house and splice to THWN there before going down to the spa disconnect - I'd rather avoid those splices if I can.
Thanks for the help.
peak
Read more: http://www.************.com/forum/e...-prepping-eventual-hot-tub.html#ixzz2tmvvw4ct
I've been doing quite a bit of researching on this, but wanted to run by the board my plan and a couple of questions.
Background: House is a 1950s mid-century modern in San Diego; house is concrete block construction. I want to prepare for a hot tub at some point. Hot tub location would be near a 90A subpanel that has capacity (I did the load calcs). With some other remodeling going on, I have ok access to the panel and to where I'd exit the house with the wiring. Basically, it's a good time for me to run the inside of the house part of the wiring now and I"ll complete the outdoor portion later.
I plan to run a 50A GFCI circuit with 6/3 w/ ground NMB from the subpanel to where I'd exit the building (top plate above concrete block) and mount the spa disconnect (which is greater than 5 feet away from where the hot tub would be located). From the spa disconnect, I'd run 1" PVC conduit to where the hot tub would be located and eventually pull 4-wire 6AWG THWN.
My questions:
1) I know it would be better to run conduit even inside, but it's going to be pain to make that work. Can I use the NMB inside? There seems to be debate about whether this is acceptable due to whether to classify as a branch circuit or feeder given insulated ground issue.
2) Assuming I can use the Romex inside, what's the best way to transition from NMB to outside? I know NMB can't be used outside (even in conduit), but does the code that allows NMB to be inside of conduit for a short distance for protection allow me to take it down the spa disconnect inside a piece of 1" PVC conduit off a LB? Otherwise I assume that I'll have to put a big 6x6 waterproof junction box where the cable exits the house and splice to THWN there before going down to the spa disconnect - I'd rather avoid those splices if I can.
Thanks for the help.
peak
Read more: http://www.************.com/forum/e...-prepping-eventual-hot-tub.html#ixzz2tmvvw4ct