Results 1 to 3 of 3

Thread: 690.13(B) for Utility Interactive Inverters

  1. #1
    Join Date
    Mar 2005
    Location
    MN
    Posts
    99

    690.13(B) for Utility Interactive Inverters

    On an AC disconnect for a utility interactive inverter, where power ceases upon loss of grid power, is the disconnect considered to have "the line and load terminals ... energized in the open position"? I say no because the point of UL 1741 is that the the inverter stops producing upon grid loss. Have some inspectors saying it's required on all disconnects, even AC. On DC discos I completely agree, but not AC. Comments?

  2. #2
    Join Date
    May 2011
    Posts
    3,744
    I completely agree with you and yet it is not particularly a battle worth fighting with dimwit... er, I mean, stubborn inspectors. I've had inspectors listen to my entire discussion of an interactive inverter and say "That's really interesting, thanks for explaining that to me. I still want the stickers." Not worth saving 3 bucks of stickers to not pass inspection.

    Where the signage should be put on is:
    1) DC disconnects where there are other paralleled DC circuits that energize the load/inverter side of the switch.
    2) AC disconnects in systems with stand-alone capability.

  3. #3
    Join Date
    Jan 2012
    Location
    CA
    Posts
    473
    Quote Originally Posted by jaggedben View Post
    I completely agree with you and yet it is not particularly a battle worth fighting with dimwit... er, I mean, stubborn inspectors. I've had inspectors listen to my entire discussion of an interactive inverter and say "That's really interesting, thanks for explaining that to me. I still want the stickers." Not worth saving 3 bucks of stickers to not pass inspection.

    Where the signage should be put on is:
    1) DC disconnects where there are other paralleled DC circuits that energize the load/inverter side of the switch.
    2) AC disconnects in systems with stand-alone capability.
    what he said. those signs are for the DC discos. Because capacitors in the inverter keep the dc side live for 5 minutes.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •