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Wire Gauge for wiring up new spa


scorpionc53
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Good morning,

Yesterday I purchased a Hot Springs hot tub which should be delivered in the next couple weeks. I have existing wiring for the old hot tub I had removed, but the wire gauge is only 10, and my new tubs manual suggests 8ga, but I also need 4 conductors, where the old only had 3.

So my question is this. My new spa requires 50a to run, so I'll be buying new breakers for that. The manual also suggests 8ga wire for 2 hots and a neutral and 10ga for ground, but I had thought 8ga copper was only rated to 40 amps. A lot of wire suppliers say that even 6ga wire is only rated to 45 amps. So am I needing 8ga, 6ga, or even 4ga?

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13 hours ago, scorpionc53 said:

Good morning,

Yesterday I purchased a Hot Springs hot tub which should be delivered in the next couple weeks. I have existing wiring for the old hot tub I had removed, but the wire gauge is only 10, and my new tubs manual suggests 8ga, but I also need 4 conductors, where the old only had 3.

So my question is this. My new spa requires 50a to run, so I'll be buying new breakers for that. The manual also suggests 8ga wire for 2 hots and a neutral and 10ga for ground, but I had thought 8ga copper was only rated to 40 amps. A lot of wire suppliers say that even 6ga wire is only rated to 45 amps. So am I needing 8ga, 6ga, or even 4ga?

I would go with 4 #6 copper

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