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Thread: Main Disconnect Outside Building

  1. #11
    Join Date
    Aug 2015
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    Cincinnati, OH
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    Quote Originally Posted by Dennis Alwon View Post
    Can you just install a non fused swirched or do they want the overcurrent protective device outside. The switch gives you the disconnect while keeping everything the same. Since the switch does not have ocp, then you still have service panels in the interior so no equipment grounding conductor is needed between the switch and the panels.
    That would satisfy the disconnect requirement I would think, but then your “service” wouldn’t be protected. Isn’t that required?
    Where sin increased, grace abounded all the more
    Rom 5:20

  2. #12
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    Aug 2015
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    Cincinnati, OH
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    Quote Originally Posted by electrofelon View Post
    Keep in mind that above 1200 amps, it will be called a bolted pressure switch. Seems like it boils down to getting one of those, a circuit breaker and enclosure, or breaking it up into several smaller service disconnects (in which case you could use circuit breakers, or regular safety switches because you dodge the GFP requirement).

    Do you need metering provisions?

    Seems like a supply house gear guy could set you up with the most affordable option.
    Definitely need metering provisions. I’m thinking the single disconnect would be the best option design-wise because I’m still going to have the main switchboard inside the electric room so I’d rather feed that SB with one feed rather than multiple.
    Where sin increased, grace abounded all the more
    Rom 5:20

  3. #13
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    Feb 2003
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    Massachusetts
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    Quote Originally Posted by Fitzdrew516 View Post
    That would satisfy the disconnect requirement I would think, but then your “service” wouldn’t be protected. Isn’t that required?
    It would be something the AHJ would have to be good with. It might be worth asking but at this size I really doubt there is going to be much savings if they even make a non-fused bolted pressure switch.

    It sounds to me that at the least you are stuck with at least one section of outdoor switchgear containing either breaker or a BPS with fuses and GFP for either method.

    I do not see pricing on this type of equipment so I do not know if the BPS or a breaker is more affordable.

  4. #14
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    Jun 2004
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    Cherry Valley NY, Seattle, WA
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    Quote Originally Posted by Fitzdrew516 View Post
    Definitely need metering provisions. I’m thinking the single disconnect would be the best option design-wise because I’m still going to have the main switchboard inside the electric room so I’d rather feed that SB with one feed rather than multiple.
    Are BPS's available with metering provisions? I assume not, but I dont know much about them. If not, its pretty much gotta be a SB.
    Ethan Brush - East West Electric. NY, WA. MA

    "You can't generalize"

  5. #15
    Join Date
    Feb 2003
    Location
    Seattle, WA
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    18,701
    I strongly recommend that you start here:
    Quote Originally Posted by Fitzdrew516 View Post
    . . . the plans reviewer tells me that this particular city has an ordinance that says our service disconnect must be outside.
    Get a copy of that ordinance, and read what it says. This is a "Charlie's Rule" situation, if ever I have encountered one. We really can't help you find a way to satisfy the plans reviewer, unless we know exactly what the rule requires.

    Charles E. Beck, P.E., Seattle
    Comments based on 2017 NEC unless otherwise noted.

  6. #16
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    Cincinnati, OH
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    Quote Originally Posted by charlie b View Post
    I strongly recommend that you start here: Get a copy of that ordinance, and read what it says. This is a "Charlie's Rule" situation, if ever I have encountered one. We really can't help you find a way to satisfy the plans reviewer, unless we know exactly what the rule requires.

    Yeah I looked up the exact ordinance when I got the comment. It definitely requires what he’s saying sadly.
    Where sin increased, grace abounded all the more
    Rom 5:20

  7. #17
    Join Date
    Dec 2011
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    Ocala, Florida, USA
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    Quote Originally Posted by Fitzdrew516 View Post
    Yeah I looked up the exact ordinance when I got the comment. It definitely requires what he’s saying sadly.
    We get used to doing things the way they are done in the area we reside. If this is a typical requirement in the Seattle area then the solutions should be typical also. I now reside in Florida. They barely even know what a sectional free standing gear with a metering section is. In California, for PG and E it is standard for any large service. It really isn't that big a deal to put the Service disconnect in its own enclosure and install it outside. Then the switchgear inside only needs to be main bus only. [edit] I read this and it sounds a little like I am attacking you. I am sorry for the tone. It is just a good jumping place to make my point since you said, "sadly."


    I know what I don't know, and I know where to go to find it!

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