SPA Wiring

[jade97]

Good Afternoon All,

I have a SPA Wiring Project and wanted to run my plans by GJ Experts.

I have a 400 amp service consisting of 2 200 amp panels feed from a Generac 400 amp ATS.

My plan is the following starting from my panel to the SPA.

• 
  [*}Eaton Type BR2
• 50 50A 2-Pole Std Trip Breaker
• ~80 feet of Southwire Romex SIMPull 6/3 w/gnd (run inside the house)
• Square D QOE250GFINM 50A non-fusible, non-metallic SPA Box with GFCI (mounted outside the house, fed from back of box)
• ~35 feet of Southwire Romex SIMPull 6/2 w/gnd (run inside the house)
• Non-Metallic Outdoor Rated Box, probably single gang with cover (mounted outside the house, fed from back of box)
• Minimum Required amount of 6/2 w/gnd inside Non-Metallic Liquid-tight Conduit

The reason for running the wire from the GFCI to the other outside box is for aesthetics, since the GFCI needs to be in line of site but at least 5 feet from the water. This is going on a patio, under my deck, so I have limited placement with the sliding door.

What size Non-Metallic Liquid-tight Conduit do I need for the 6/2with gnd? 1/2" or 3/4"?

 

[mike93lx]

Nm-b can't be outside at all, regardless of how it is protected. Use thwn outside in the conduit.

 

[jade97]

Thank you for the response! Did you mean THHN? Stranded?

 

[mike93lx]

Thank you for the response! Did you mean THHN? Stranded?

Yes, absolutely stranded.

Basically any thhn will be dual rated thhn/thwn, so it almost doesn't matter, but you do have to make sure it has the thwn rating. W is for wet.

 

[mike93lx]

Do you have an existing 120v outlet nearby? I think that's a requirement for service?

Why 6/3 to the disconnect?

 

[wyliesdiesels]

Why are you running 6/2 for a portion of the run?

Almost all spas need 120/240v so you would need 2 hots neutral and ground

your description is a bit confusing.

perhaps you could do a drawing and upload it here

 

[jade97]

I do have an existing 120 VAC GFCI Outlet nearby.

I also need to add a GFCI in between the Outside light and the switch.

The Jacuzzi (J-375) manual wants the GFCI to be in the line of sight disconnect, thus needing the Neutral from the panel to the disconnect.

 

[wyliesdiesels]

I do have an existing 120 VAC GFCI Outlet nearby.

I also need to add a GFCI in between the Outside light and the switch.

The Jacuzzi (J-375) manual wants the GFCI to be in the line of sight disconnect, thus needing the Neutral from the panel to the disconnect.

I just looked up this spa.

It is 3-wire 240v only so you dont need a neutral afterall.

Just run 6/2 or 8-8-10 THWN in conduit. #8 THWN is rated for 50a

Any power for 120v switch our outlet should be ran separately...

 

[jade97]

I don't have a host for pictures....

Jacuzzi J-375

https://www.jacuzzi.com/media/6088/2530-398f-eng-rev-b.pdf

Requirements Pg 12 6.1 (50A)

Wiring Pg 16 Figure C

 

[jade97]

Will the 6/2 thhn + gnd fit properly in 1/2" non-metallic liquid tight flex conduit or do I need to use 3/4"?

Thank you all to those who have responded!

 

[Norcal]

Will the 6/2 thhn + gnd fit properly in 1/2" non-metallic liquid tight flex conduit or do I need to use 3/4"?

Thank you all to those who have responded!

6/2 is NM cable w/ ground or 2 conductor cord, but w/ 6 AWG THWN 3/4" will be needed.

 

[jade97]

6/2 is NM cable w/ ground or 2 conductor cord, but w/ 6 AWG THWN 3/4" will be needed.

Thank you!