Heat pump service disconnect

Discussion in 'Electrical Forum discussion & Blog' started by mrbeing123, Jan 28, 2013.

  1. mrbeing123

    mrbeing123 New Member

    Messages:
    19
    Location:
    Louisiana USA
    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

    Heat pump SD.jpg
    Last edited: Jan 28, 2013
  2. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,566
    Location:
    North Carolina
    #2 is good for 90 amps and the #8 can be a green insulated it does not need to be bare
    Last edited: Jan 29, 2013
  3. mrbeing123

    mrbeing123 New Member

    Messages:
    19
    Location:
    Louisiana USA
    #2 Cu is rated at 115a per table 310-16. #2 al 75c is rated for 90a. or am I missing something?
  4. jwelectric

    jwelectric Electrical Contractor/Instructor

    Messages:
    2,566
    Location:
    North Carolina
    U R correct
Similar Threads: Heat pump
Forum Title Date
Electrical Forum discussion & Blog Breaker and wire size for pool heat pump - MCA, wire and breaker size. Feb 28, 2014
Electrical Forum discussion & Blog Heat pump auxilary heat Feb 10, 2010
Electrical Forum discussion & Blog choosing a disconnect for heat pump... Jul 10, 2008
Electrical Forum discussion & Blog Heating the floor of your home's elevator: What is the Best Way Today at 7:17 AM
Electrical Forum discussion & Blog New circuit for gas water heater Dec 7, 2014

Share This Page