Hot Tub Cable and Electrical Wiring
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How to Install Hot Tub Electrical Circuit Wiring: Can I run a regular 6AWG 3 conductor wire plus ground through a one inch conduit or do I need to run outdoor 6AWG wire? © By: Dave Rongey |
Hot Tub Circuit Wiring
Electrical Question: Can I run regular 6AWG 3 conductor plus ground through a one inch conduit or do I need to run outdoor 6AWG wire?
Hot Tub Circuit Wiring – Project #1
- I’m installing electrical wiring to the hot tub located in my backyard.
- I am thinking that regular indoor wire run through conduit is OK.
- Also, to my understanding, the wire must not be buried and be above ground by at a minimum height.
This electrical question came from: Mike, a Homeowner from San Diego, California.
Hot Tub Circuit Wiring – Project #2
- I am installing a hot tub in our back yard. I have to run about 45 feet of cable indoors from the primary breaker panel to the outside wall where it will connect to the sub panel with the GFCI shutoff on the outside of the house.
- When the cable comes out of the house it will be low to the ground, so I can’t go directly into the back of that sub panel, so I will install conduit from where it comes out of the house, and up to the panel which is about 1.5-2ft.
- Can I use Romex Brand /NMD90 6/3 Type-NM Cable for this? I know Type-NM Cable is acceptable for indoors, and into the back of the panel on the outside of the wall. But, since the cable has to come out of the house low to the ground it will need to go in conduit and up about 2 feet to the sub panel on the outside wall. Is this okay? If not, what would you recommend?
- Then from the outside panel and GFCI I’ will use THHN in conduit or direct bury the wire to the hot tub.
This electrical wiring question came from Justin, in Edmonton, Alberta, Canada.
Dave’s Reply:
Thanks for your electrical question Mike.
Methods for Installing Hot Tub Circuit Wiring
Application: Wiring a Hot Tub GFCI Circuit.
Skill Level: Intermediate to Advanced – Best installed by a Licensed Electrical Contractor.
Tools Required: Basic Electricians Pouch Hand Tools, Voltage Tester.
Estimated Time: Depends on personal level experience, ability to work with tools and install the hot tub wiring.
IMPORTANT: Installing hot tub circuit wiring must be done according to applicable Local and National Electrical Codes, or Canadian Electrical Codes, with a permit, and the work must be inspected.
Examples of Hot Tub Circuit Wiring Methods
The questions asked about hot tub circuit wiring address methods which I will describe below:
- Electrical Cable for a Hot Tub
- 6/3 Romex brand or UF cable cannot be run inside long lengths of one inch conduit.
- Cable may be installed into a short length of conduit where it is used to stub up out of a trench or where emerging from a protected area such as a crawl space under a house.
- An insulated bushing mush be installed onto the end of the conduit to protect the cable.
- Wire and Conduit
- If you are using long lengths of conduit for the hot tub circuit wiring then you should install four separate conductors, and the type of wire will depend if the conduit will buried or not.
- Type THWN wire is a good choice because it is rated for buried conduit applications.
- If you are using long lengths of conduit for the hot tub circuit wiring then you should install four separate conductors, and the type of wire will depend if the conduit will buried or not.
- Using a Junction Box for Hot Tub Wiring
- When using two types of wire or cable for a hot tub circuit a junction box may be installed in an accessible location where the wires may be spliced.
- Wire splices must be performed using corrosion inhibitor and approved wire splicing connectors.
- Permit and Inspections Are Required
- Do not take shortcuts or take chances. Electrical wiring projects such as this require a permit and inspections from your local building department.
- Your local building authority will be happy to assist you with your hot tub project.
More about Wiring Hot Tubs
- Hot Tub Wiring
- Electrical Codes and Details for Spa and Hot Tub Wiring.
- Essentials for your installation, including the required GFCI ground fault protection and circuit wire size.
Electrical Wire for the Home
Complete listing of electrical wire types and parts used for home projects with electrical code information serves as selection guidelines.
The following may also be helpful for you:
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