3 wire to 4 wire conversion for Hot Tub


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Old 08-08-16, 03:30 PM
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3 wire to 4 wire conversion for Hot Tub

I'm installing a new hot tub, replacing and existing one that was wired with only 3 wire (two hot/one ground). When determining if I was going to replace the entire line, I realized the main panel is still single ground/neutral bar (grounds and neutrals are all wired to the same bar). Since the main panel is shared ground/neutral, is it still required to run a dedicated ground all the way to the panel, or can I marry the ground to the neutral at the tub? (also, read conflicting opinions on grounding rod, any thoughts there assuming I use the 3rd wire going to the panel as the neutral?)
 
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Old 08-08-16, 03:43 PM
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Since the main panel is shared ground/neutral, is it still required to run a dedicated ground all the way to the panel
No you need 4-wire (H,H,N,G) to the hot tuber. No ground rod required but if on a concrete slab you may need bonding to the rebar in the slab.
 
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Old 08-08-16, 03:46 PM
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Welcome to the forums.

A true 240v hot tub only requires two hot wires and ground.
A 120/240v hot tub requites a separate neutral or four wires.
 
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Old 08-08-16, 07:17 PM
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A ground rod will do nothing at the tub and is not required.
 
 

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