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Thread: 220v to 110v

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  1. #1
    DIY Junior Member StatManLV's Avatar
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    Default 220v to 110v

    I have a 50amp 220v line (3 wire plus ground) in my master bath that is hard-wired to a hot tub. Remodeling the bathroom and replacing the hot tub with a 110v air bath. Can I use the 220v line to feed a sub-panel (I would hide it in a closet in the bathroom) and then branch two 110v circuits out of the sub-panel?

  2. #2
    Homeowner Thatguy's Avatar
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    Post a link to the specs for your hot tub.

  3. #3
    DIY Junior Member StatManLV's Avatar
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    It's 18 years old, I can't even find it on the manufacturers website.

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    Electrical Contractor/Instructor jwelectric's Avatar
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    Quote Originally Posted by StatManLV View Post
    I have a 50amp 220v line (3 wire plus ground) in my master bath that is hard-wired to a hot tub. Remodeling the bathroom and replacing the hot tub with a 110v air bath. Can I use the 220v line to feed a sub-panel (I would hide it in a closet in the bathroom) and then branch two 110v circuits out of the sub-panel?
    NO

    You can not put a panel in the bathroom or in a closet.

    Yes you can use the branch circuit to feed a panel as long as the conductors are protect at or below the ampacity of the conductors.
    The panel can not face in the bathroom or a closet but can be in the same wall as long as it faces out of these places.

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    DIY Junior Member StatManLV's Avatar
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    Quote Originally Posted by jwelectric View Post
    NO

    You can not put a panel in the bathroom or in a closet.

    Yes you can use the branch circuit to feed a panel as long as the conductors are protect at or below the ampacity of the conductors.
    The panel can not face in the bathroom or a closet but can be in the same wall as long as it faces out of these places.
    Can you explain why it can't be in the bathroom closet?

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    Nuclear Engineer nukeman's Avatar
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    It is an electrical code issue (NEC). Panels are not allowed in closets or bathrooms.

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    DIY Junior Member StatManLV's Avatar
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    Bummer, thanks for the clarification. Guess I need to go to plan B

  8. #8
    Electrical Contractor/Instructor jwelectric's Avatar
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    Quote Originally Posted by StatManLV View Post
    Can you explain why it can't be in the bathroom closet?
    Well in a closet we have all kinds of stuff like cloth that will burn real easy. In the bathroom we have a lot of moisture in the form of a vapor such as steam and other things like this.

    Besides all this it is a violation of 240.24(D)&(E) of the NEC. (D) says no overcurrent devices in a closet and (E) says no overcurrent in a bathroom. Now if you wanted to set a panel in either location it would be okay just as long as you didn't install any overcurrent devices such as fuses or breakers.

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    Retired Defense Industry Engineer jadnashua's Avatar
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    I think you would need to run another cable. While neutral is connected to ground in the main panel, a subpanel needs the neutral and ground to be separate, along with the two legs (i.e. a 4-wire cable, not three). The neutral is supposed to carry the return current, not the ground wire. The ground is for safety, not current for normal operation. A 240vac device does not need the neutral lead, but a 120vac circuit does.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  10. #10
    DIY Junior Member StatManLV's Avatar
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    Quote Originally Posted by jadnashua View Post
    I think you would need to run another cable. While neutral is connected to ground in the main panel, a subpanel needs the neutral and ground to be separate, along with the two legs (i.e. a 4-wire cable, not three). The neutral is supposed to carry the return current, not the ground wire. The ground is for safety, not current for normal operation. A 240vac device does not need the neutral lead, but a 120vac circuit does.
    The current cable is a 4 wire cable.

  11. #11

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    Quote Originally Posted by jwelectric View Post
    NO

    You can not put a panel in the bathroom or in a closet.
    You can not put a panel in the dwelling bathroom or in a clothes closet.


    Subtle but important difference.

  12. #12
    Electrical Contractor/Instructor jwelectric's Avatar
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    Quote Originally Posted by 220/221 View Post
    You can not put a panel in the dwelling bathroom or in a clothes closet.


    Subtle but important difference.
    Very true and thank you

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