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Old 03-31-2010, 11:11 PM   #1
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Upsizing Copper Wire for 60Amp


Should i spend the $ upfront to upsize from 6/3 with 10 ground to 4/3 with 8 ground. This is for a dedicated service to a 48Amp Spa that requires 60 Amp breaker. Total run of wire is ~75 feet.
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Old 04-01-2010, 12:18 AM   #2
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Naw ., not really due you are near the borderline with distance and you can stay with 16mm˛ { # 6 AWG }

However there is one good head up you can not run UF or NM to the spa at all you have to run this in the conduit and use green ground conductor { this is very specfic in NEC code }

Merci,Marc
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Old 04-01-2010, 07:37 AM   #3
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I am going to add one thing to Marc's post. NM can be used on the interior portion of the circuit if the hot tub is installed outside.
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Answers based on the National Electrical Code. Local amendments may apply. Check with your local building officials.
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Old 04-01-2010, 01:20 PM   #4
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stupid question probably but even us guys with licenses don't know it all and any that say they do....well don't hire them . In this case would it be legal to run a nm cable suitable for direct burial with an insulated ground in it to the hot tub? sleeving the above ground parts in pvc?
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Old 04-01-2010, 01:28 PM   #5
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Quote:
Originally Posted by andrew79 View Post
stupid question probably but even us guys with licenses don't know it all and any that say they do....well don't hire them . In this case would it be legal to run a nm cable suitable for direct burial with an insulated ground in it to the hot tub? sleeving the above ground parts in pvc?
That's debatable. Some will argue that the equipment ground of UF cable is insulated by the pvc sheathing. I disagree but I'm absolutely sure a lot of spas are wired that way.
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Old 04-01-2010, 01:33 PM   #6
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i'm talking of a four wire cable....i've seen them and they aren't cheap so it's probably not cost effective but i was just curious. It's an NMWU cable with an insulated red black white as well as an insulated green.
edit* nevermind we're talking about the same cable i think

Last edited by andrew79; 04-01-2010 at 01:35 PM.
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