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generator

  1. jar546

    Generac Gaining Ground

    It is not often that I see Generac being used for health care facilities but it looks like they are gaining ground as seen by this cropped submission on for this control and power line diagram. Lots of questions on this one.
    • jar546
    • Thread
    • critical loads generac generator health care generator
    • Replies: 2
    • Forum: Electrical Codes
  2. jar546

    What would you do? Breaker Panel behind generator.

    OK, so you are called out to inspect a new generator and you find this. The generator company swears the new generator is in the same location as the old and the issue with workspace was pre-existing. You then find out that they will be changing the breaker inside that box and you will...
  3. jar546

    Does this stay or go?

    This is a 480/277 generator that has an ATS in an office building. As you can see, the neutral is bonded to the frame of the generator. The ATS confirms that this is not a separately derived system because the neutral is not switched. Should this factory installed bond between the neutral and...
  4. jar546

    The Problem Using 220.87 to Size Generators and Other Equipment

    NFPA 70, aka NEC 220.87 allows you to use the maximum demand data for load sizing. If you don't have a smart meter or access to this information from your POCO, you would have to do record for a 30 day period with data every 15 minutes and hopefully it was done during the highest usage month of...
  5. jar546

    Ground Rods at Generators

    Who among you still require a ground rod at a standby generator when it is a non-separately derived system? I would estimate that 100% of generators for residential homes are NOT separately derived systems.
    • jar546
    • Thread
    • generator ground rod grounding separately derived system
    • Replies: 6
    • Forum: Electrical Codes
  6. jar546

    Attack of the Killer Polaris Taps

    When you have to use almost $1,500 worth of Polaris taps because someone ordered the generator ATS set up the wrong way.
  7. indyarchyguy

    4 Story I-1...Generator?

    Recently a LFO asked me if a 4-story I-1 would be required to have an emergency generator. I looked and can't seem to find anything requiring the generator. Any suggestions would be most helpful. Thank you.
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