I want to purchase a hot tub for my back yard. It requires an
electrical disconnect and is 220 as opposed to 110. Anybody know what I
would need to purchase in terms of parts and how to hook this up? I
have run 110 out to my garage in the past with the romex underground,
and I know some basic wiring. Just need to know how to do the
disconnect, what type of wire I need, etc. Thanks
for 220, you'll need to get a four wire line. When you did your 110V,
you probably used a 3 wire (red, black, copper). 4-wire is just like
that except you have an additional color, white.
To do it right, you'll need to find our the amperage requirement of the
hot-tub and, based on how far the box will be from the main breaker,
have to size the 4-wire accordingly.
For hookup, the 220V uses both busses on the breaker box, instead of
one buss for the 110V.
Go to your local HDepot, get a book on this, and they'll explain it
better than I can.
There are two common types of wiring used for hot tubs. It depends on
the requirements of the tub. If it has 110V and 220V equipment in it
you would need a wire called 3 wire (ie 8/3 or 6/3 - meaning that the
wire is 8 guage or 6 guage and 3 conductors plus a bare copper ground).
The colors in a 3 wire are red, black, white and bare copper for
Newer tubs are changing however to a straight 220V connection. In
which case you only need a 2 wire (ie 8/2 or 6/2). If you check, it is
probably the same price for a 2 wire cable as a 3 wire cable (roughly
speaking) because the 3 wire is more common.
You need to know what the amperage of the hot tub is and the distance
that you are running. From that information, you can choose the
correct size of wire and an appropriate breaker. If you have that
information, you can talk to an electrician who works at your local
home depot (make sure that you are speaking with an electrician
thought) and he/she can help you choose the right materials and explain
how to install it.
amp. Our codes in Canada would use 8 guage wire for 40 amp and 6 guage
for 60 amp assuming the run from breaker to tub is less than 100 feet.
Over that, may require that the cable be larger.
Hope this information helps.
Remember, a hot tub must be wired with a GFI breaker protecting the
circuit. It is critical to ensure that anyone using the tub is safe.
There are only a few GFCIs which meet the NEC Code for Hot Tubs.
Here is a link to one of them:
Make sure you get an electrician that knows what he is doing and has
specifically installed service for hot tubs before. It's the one area
of house wiring where false assumptions can be deadly.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.