Announcement

Collapse
No announcement yet.

Backfeeding via multiple subpanels

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    #16
    Originally posted by PVfarmer View Post
    Doesn't the utility req. for a PV disco adjacent to the meter come from the NESC?
    I don't think so, but instead of speculating about where PG&E's requirements come from, why not get them straight from the horses mouth. I regret not posting that link earlier.

    The utility wants to be able to disconnect the PV system from the meter, [/QUOTE]

    What I think they care about is disconnecting the PV system from their grid in the unusual case where a backfeed causes problems. They care less whether the PV system stays connected to the load side of the meter. A smart meter with a shutoff capability is one way they can meet their needs without requiring a discreet disconnect. But those don't come rated more than 320A. (I believe that's 320A continuous, so a 400A rated panel may still qualify, but I could be wrong and that's where the actual text of the panel label or a letter from a manufacturer will determine the outcome.)

    Comment


      #17
      Originally posted by PVfarmer View Post
      But I still think it's as simple as: there are no 400A breakers rated for 3 sets of conductors.

      Have you seen a 400A breaker with that capability in your everyday dealings?
      Originally posted by PVfarmer View Post
      KG808/OP-
      There may be some relevant info here, the first two links should be pdfs from Eaton.
      https://www.google.com/search?q=appl...s+molded+eaton
      Not relevant or helpful to the OP. 400A main could be feeding a panelboard which feeds all three subpanels, or any of several other arrangements. There's no reason to believe the OP has a problem with the equipment on site, that would be a whole other thread. Keep it on topic.

      Comment


        #18
        Originally posted by jaggedben View Post
        400A main could be feeding a panelboard which feeds all three subpanels, or any of several other arrangements.
        You'd rather argue with me than read- why?
        Not reading their comments is...
        "Not relevant or helpful to the OP."

        I already suggestested the italicized back in comment #3. The OP did not say "oh we already have that", so...where'd you get it from?

        Originally posted by Kg808 View Post
        Option A: Ground mount all of the panels and just back feed straight to the main.

        I have tied my backfeed OCPD into many sub panels before. But never ran into this situation to use multiple roof spaces and sub panels to backfeed one main/meter.

        Comment


          #19
          Originally posted by PVfarmer View Post
          Not reading their comments is...
          "Not relevant or helpful to the OP."
          Being an inexperienced person who doesn't know how to read their vocabulary is what's not helpful. "just back feed straight to the main" has meant the main panel, most of the hundreds of times people have said to me in the course of my work. It does not imply a supply side connection. But even if I'm making a wrong assumption there, it's off topic. The OP just asked if an AHJ will allow multiple PV sources to be connected at various locations. Line or load side at the main makes no difference to the answer to his question.

          Comment


            #20
            Ok... let's all play nice huh? you guys are going back and forth on semantics here. I understand I could've been a little more clear with my wording on my OP.

            Pv farmer: I understand why you're concerned about 3 load side terminals on a main breaker. It's a 400a panel with a 200A split. 200A main feeding straight to the main house sub panel and a 200A main with attached 12/24 space distribution at the main panel. With 2 100 A breakers feeding sub panels at the other 2 structures.

            and yes the main concern I had was wether or not I could mount on 3 separate buildings for the same pv system. Sorry if I over complicated it. The ampacities of the panels and breakers were just for a better picture of the system as a whole.

            All these replies have been great help though. PGE has responded and said they have no problem with it as long as the signage is clear. Waiting on response from the AHJ.

            Thanks again for the help.

            Comment

            Working...
            X