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Thread: Heat pump service disconnect

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  1. #1
    DIY Junior Member mrbeing123's Avatar
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    Default Heat pump service disconnect

    The package heat pump in question require two circuits. Is it usual for an electrician to run one circuit large enough to run both to a loadcenter by the package unit and then take two branch circuits off of there? And then use this load center as the equipment's service disconnect?

    If I understand this correctly(and please let me know if you think I don't)...

    Run 2-#2 75c THW and 1 - #8 bare in 2" pvc conduit from the outside loadcenter/meter base on a 100amp breaker

    to

    say an Eaton 125 Amp 4-Space/Circuit CH Type Main Lug Loadcenter

    and and from this, run a whip with the two circuits with wire sizes and MOCPs per manufacturer's specs

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    Last edited by mrbeing123; 01-28-2013 at 01:41 PM.

  2. #2
    Electrical Contractor/Instructor jwelectric's Avatar
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    Default

    #2 is good for 90 amps and the #8 can be a green insulated it does not need to be bare
    Last edited by jwelectric; 01-29-2013 at 02:42 AM. Reason: spelling

  3. #3
    DIY Junior Member mrbeing123's Avatar
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    Quote Originally Posted by jwelectric View Post
    #2 is good for 90 amps
    #2 Cu is rated at 115a per table 310-16. #2 al 75c is rated for 90a. or am I missing something?

  4. #4
    Electrical Contractor/Instructor jwelectric's Avatar
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    Quote Originally Posted by mrbeing123 View Post
    #2 Cu is rated at 115a per table 310-16. #2 al 75c is rated for 90a. or am I missing something?
    U R correct

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