Question About Neutral-to-ground Bond

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  • joeyp
    Member
    • Jul 2012
    • 56

    #1

    Question About Neutral-to-ground Bond

    The user manual for the Cotek SK1500-124 24V Pure Sine Wave Inverter states:

    ---
    3-6. AC Safety Grounding:
    The AC output ground wire should go to the grounding point for your loads
    ( for example, a distribution panel ground bus ).
    3-6-1. Neutral Grounding (GFCI’S):
    3-6-1-1. 120V models:The neutral conductor of the AC output circuit
    of the Inverter is automatically connected to the safety
    ground during inverter operation. This conforms to National
    Electrical Code requirements that separately derived from AC
    sources (such as inverters and generators) which have their
    neutral conductors tied to ground in the same way as the
    neutral conductors from the utility tied to ground at the AC
    breaker panel.
    ---

    This says a neutral-to-ground bond already exists within the inverter, for the AC output side, right?

    And so I will run a ground wire from the inverter chassis to the ground bus bar in my DC panel. But should I include another bond there, between that same ground bus bar and the neutral bus bar?

    Would that make two bonds...which is bad!?...or would the two be separated, one on the DC side (breaker box) and one on the AC side (inverter)? Or does the inverter also bond on the DC side as well?

    Thanks!
  • joeyp
    Member
    • Jul 2012
    • 56

    #2
    The unit does NOT have a GFCI outlet.

    Comment

    • Mike90250
      Moderator
      • May 2009
      • 16020

      #3
      This a sort of a gray area, I don't have your manual for your transfer switch, inverter, or main electrical panel. Best advice is to have the person who installed the transfer switch, decide for you, how to manage bonding for your "Separately Derived Source". All depends if the transfer switch breaks the neutral, and where the main panel bond is.


      It's not simple, and from way over here, I can't help. Your local installer is your best bet.
      Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
      || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
      || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

      solar: http://tinyurl.com/LMR-Solar
      gen: http://tinyurl.com/LMR-Lister

      Comment

      • joeyp
        Member
        • Jul 2012
        • 56

        #4
        The setup is much simpler than that. There is no transfer switch. The inverter will simply have electrical extension cords plugged into it for now.

        I just want to know if I still need the neutral-to-ground bond in the DC breaker box. The manual for the charge controller shows it.

        Comment

        • joeyp
          Member
          • Jul 2012
          • 56

          #5
          I'm not sure if I'm referring to this using the correct terminology. I mean to say..."The wire connecting the DC negative bus bar to the Ground bus bar."

          Comment

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