What wire size should I use for my hot tub?
Trying to figure out which size wire and what size circuit breaker for a 240V hot tub we’re trying to wire. From service panel to disconnect box will be approximately 90′. The heater element for the system shows following specs:
VOLTS: 120 – 240
AMPS: 16 – 32
1 PHASE 60HZ
From the Heater element is where a 230v motor and a 115v motor get their supply as well as a 120v ozoanator.
As it looks right now I’m going to purchase 6/3 AWG UF wire and a 50A double pole circuit breaker. If this is wrong I would like to know. Any help would be greatly appreciated. Thank you.
I’ll agree that you really should have a pro look at this.
But, If you are destined to DIY anyway….
The 6-3 UF-B to the disconnect sub-panel will be fine. Feed it with a 60amp breaker from the main panel (still within NEC specs for a 6-3 UF-B). Put a 50 amp, 2-pole, GFI breaker into the disconnect sub-panel (Double check the manufacturers installation instructions. 50amp is kind of the ‘normal’. But I have seen 40 and 60 amps too.) By feeding the sub-panel with 60 amps, you now have the ability to use the spare breaker space and sub-panel capacity to feed a circuit for the service receptacle that is also required.
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