DIY Home Improvement Forum banner

Hot tub wiring from main house

3K views 8 replies 5 participants last post by  Jim Port 
#1 ·
Hello all...
I am hoping this will be quick and easy scenerio here.

I need to run a 50 to 75 foot 8/3 w_ground from main house panel to outside subpanel box.

I was planning on using THHN indoor wire. I is going to run through the garage, into basement and near furnance. I am punching a hole through foundation and need 10 to 15 feet out past wall to subpanel box. I believe the wire is OK in the ceiling by itself, but not sure if I should use EMT, PVC or the Non-Metallic Liquid-Tight Flexible Conduit?

The subpanel will have a 50 amp gfci and the main panel in house will have 50 regular breaker. From the subpanel I was going to run 10 to 15 feet connections to the hottub. The dealer is supplying me the subpanel. The code in my area is subpanel needs to be more than 5 feet from tub but no more than 10 feet (but visible)

Could I use the same flexible pipe?
http://www.lowes.com/pd_69860-295-5...rd_nbr|0||p_product_quantity_sold|1&facetInfo=

Also, the hole in the foundation of the house...should there be some kind of union? I have no idea what this is or looks like....

Besides all this...I am comfortable running and hooking up the cabling/breakers. Thanks for the help.
 
See less See more
#8 ·
Let's quote some pertinent sections of the Code

356.10. Uses Permitted. LFNC shall be permitted to be used in exposed or concealed locations for the following purposes:

(5) Type LFNC-B shall be permitted to be installed in lengths longer than 6 ft where secured in accordance with 356.30.
So far, we have established you can use longer than 6 foot lengths ... (continuing)
356.30. Securing and Supporting. Type LFNC-B shall be securely fastened and supposed in accordance with one of the following:

(1) Where installed in lengths exceeding 6 ft, the conduit shall be securely fastened at intervals not exceeding 3 ft, and within 12 in on each side of every outlet box, junction box, cabinet or fitting.

(2) Securing or supporting of the conduit shall not be required where it is fished ....
It's been my experience that most of the flex is "fished" once it enters the skirting of the hot tub, and you can bury the stuf between the disconnect and that entrance point, thus avoiding most of the "supporting" requirements.
 
#4 ·
Jim. You are saying I can only go 6 feet from sub-panel? Is this code for your area. I was told more than 5 less than 10 but the owners manual say not more than 50'. Haha. I guess ill get electrician over here. I've heard 4 different stories so far. Two from here and two from other friends. Thanks guys.
 
#6 ·
Doesn't the 6-foot limit apply to metallic flex, not non-metallic flex? Where is that in the code? I thought NM flex was a general purpose raceway allowable in any length (though sloppy).
 
#7 ·
That is what I thought. I've definitely seen longer than 6 feet. The box has to be 5 feet from tub. So what we have 1 foot to make it to tub wiring port? The directions I got say I should have 15 feet of cable from rear of tub. The power needs fed to front. It should work out.

Electrician coming tomorrow. Wish me luck.
 
#9 ·
The length limit is in 680.42(A)(1).

(1) Flexible Conduit. Liquidtight flexible metal conduit or
liquidtight flexible nonmetallic conduit shall be permitted
in lengths of not more than 1.8 m (6 ft).
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top