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    RangeMonkey's Avatar
    RangeMonkey Posts: 3, Reputation: 1
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    #1

    Jul 3, 2011, 10:52 AM
    220V/30A Hot Tub Connection
    I have a hot tub I would like to set up for 220V/30A. I have a J-box with 3 wires, 2 black and 1 green, that is wired to a 30A circuit breaker. Measuring either black to green gives me 110, measuring black to black yields 220. There is a solid copper for earth ground as well. The connections for the tub are Brown, White and Black.
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #2

    Jul 3, 2011, 04:50 PM
    Hope it's a double 30. Black to black, black to brown, ground to ground. Usually see red or blue but brown is acceptable. Doesn't the tub have a wiring diagram?
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #3

    Jul 3, 2011, 04:53 PM
    BTW, usually see 120 and then 240. Are you in the US?
    RangeMonkey's Avatar
    RangeMonkey Posts: 3, Reputation: 1
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    #4

    Jul 3, 2011, 07:06 PM
    Comment on ma0641's post
    Yes. Tub Schematic shows L1 to Black/Blue stripe. L2 to Black. Neutral as White.
    RangeMonkey's Avatar
    RangeMonkey Posts: 3, Reputation: 1
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    #5

    Jul 3, 2011, 07:08 PM
    Comment on ma0641's post
    Yes, my bad. Using an analog meter.
    ma0641's Avatar
    ma0641 Posts: 15,681, Reputation: 1012
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    #6

    Jul 3, 2011, 07:50 PM
    If it shows a neutral are you sure it's straight 240VAC? There is no neutral in 240. Make sure it isn't 120/240VAC. If it is, you will need to use a 10/3 not a 10/2.
    Dr_Spa's Avatar
    Dr_Spa Posts: 101, Reputation: 13
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    #7

    Jul 5, 2011, 08:34 AM

    Most 220v spas ALSO use a white neutral wire. You're going to have to pull an additional white wire.

    The bare copper wire is a BONDING wire.

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