Regular wiring method for hot tub?

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ritelec

ritelec

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Jersey
questions please.
Hot Tub, residential. built within a cement deck.
Access to electrical enclosure is in crawl space under deck.

Disconnect would be underneath at equipment but what about an emergency switch at the unit (on top of deck).

It's a single family residence.

For now it's a gfi breaker to disconnect to unit. Install another disconnect on top of deck as emergency switch? What about one of them mushroom switches. If so I would need a bit more than a breaker and disconnect.

Wiring method.....Can those hot tub conductors be in the same conduit as lighting and receptacle circuits? I was thinking no.......but now I'm thinking they can. I'm thinking they don't even have to be in conduit........could even be done in nm.


Where's that book.........
 
The purpose of the disconnect is for someone who who is working on the tub so IMO the disconnect needs to be in sight of the motors, etc. The emergency cutoff is not required for a single family dwelling.
 
If this is a new install I would read the Mfg requirements for electrical. Alot of the units that I have been seeing are calling for a Equip ground that is the same size as the ungrounded conductors. It's not something that I agree has to be done, but you should install it per their cut sheet. Also, can't use indoor NM for an exterior application even if it's sleeved.
 
You can run NM underneath the dwelling to the disco but from there it must be in a conduit with an insulated ground. As "Cow" stated they often call for a full size egc. This would eliminate NM
 
you don't need a switch like a mushroom in single resi, just in multi fam or commercial.
You will need to wire size as per manufacture as others have stated.
 
Thank you for the replies.

Dennis Alwon said:
You can run NM underneath the dwelling to the disco but from there it must be in a conduit with an insulated ground. As "Cow" stated they often call for a full size egc. This would eliminate NM
Click to expand...

??? From the panel (gfi) thru the building to the disconnect can be nm (bare ground)(if manufacture doesn't state upping the size) but an "insulted" ground wire is "needed".... and only needed from the disconnect to the unit?

Interesting.

I'm not sure if I'll be able to get thru the building....... Thinking I'll have to be trenching along the building to get to it.

Was considering separate conduits for other circuits but now considering hot tub circuit and other circuits in same raceway.... permissible? One ground too ???
Same ground oversized or not right? Ground is ground?

Gotta do some research on this tub. Looks like it gets a neutral, by the inside wiring looks like it should get a 20 or 30 amp circuit... but it looks German so I wouldn't doubt a 50 or 60 amp.
 
Also....
Should I give any thought to grounding the deck???

They built a cinderblock bunker for the deck that you walk out onto from the 1st floor kitchen sliding doors.

It's about 20' x 20' ...... and about 8 cinderblock rows high.

There's a steel I beam going across two block walls, they built up from there with wood 2x8's then laid metal Q decking on that and poured that.

Should I ground the steel beam and or Q decking................or just hit the tub????


When am I going to write that hit song?
 
If there are multiple conductors in a conduit then you only need one egc sized for the largest OCPD in that run.

The epb gives no exception for a tub on a deck so, yes it is required and IMO, a bit bizarre.
 
Thanks Dennis



Dennis Alwon said:
The epb gives no exception for a tub on a deck so, yes it is required and IMO, a bit bizarre.
Click to expand...


epb??? taking a guess here, searched for epb with no results.....does that stand for "earth potential bonding" ???

so yes, thou shalt bond deck???
 
Ahhhhhhhh................leave it to the Germans.........50 amp it is.


Many years and brain cells ago.....I vaguely remember installing a hot tub and I believe the inspector wanted to see ... and I installed ... a molded case breaker for the disconnect.....

I was talking to a carpenter today and he mentioned his buddy installed a hot tub and had to install a breaker for the disconnect (which helped jog my memory).

One of them " not so expensive" AC pull out disconnects would be ng.?

Although I was originally thinking of a knife switch or something.......... (until the memory jog with the molded case breaker).

Any breaker as disconnect thoughts?


And......lets say I was to install an emergency switch at a location that could be reached from the tub area (mushroom???)..........Any idea how that would be done?

Like them elevator shunt trip breakers and trip the gfi some how???? Not that I'm going to do this, but it got me thinking on how something like that would be wired.

Thank you.............

Leave it to the Germans. 50 amp............love it.
 
Thanks Dennis.


I may be bowing out on this one.

When I looked at this job back in June, it was come out thru the foundation by the service....and run down the wall to the hot tub.

Here now in December......I would also have to penetrate back into the bunker area........also, he added a bunch of dirt along the building so I would either be removing dirt to secure to the wall, or just continue digging to get to depth and bury the conduit............... not to mention digging would be 50 + feet and the ground is freezing...... not to mention if a epb (grid) was required, the entire area around the tub has already been poured concrete.

Not to mention.......when I talked to the home owner about this............ he would just shrug his shoulders with a grin and say............" I don't understand...... It "JUST" has to be connected "....... "my dad was an electrician ..... and a friend.........and I.........".


Ahhhh..........and guess what........he's German too (thick accented).........

Yea . Piece of cake. "Just connect it".
 
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