600a feeder (Disconnecting Means)

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MBLES

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I have customer with a temp building, its actually 3 Tbuildings bolted together but it has 3- separate 200a panels feeding each t building.
so now its one big T building. i have a 800a service on H frame not being used only for couple items that are now moved. its about 150'
away, the customer wants to run over head because of new construction and other reasons.

I was thinking of running 3 separate disconnects to each T buildings but once i saw its one big T building i know that's not gonna work.
i was thinking of running a 600a disconnect with a gutter then 3 disconnects. Any other ideas?
 
Just hit a gutter with three 200 amp disconnects grouped and use the tap rules to connect those to the 600 amp feeder.

Or a 600 amp MLO panel with three 200 amp breakers. Likely least labor.
 
iwire said:
Just hit a gutter with three 200 amp disconnects grouped and use the tap rules to connect those to the 600 amp feeder.

Or a 600 amp MLO panel with three 200 amp breakers. Likely least labor.
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once i get it to new building, don't i have to follow 225.30? it has to be on one switch correct? thanks for your reply! i know its early.
 
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MBLES said:
once i get it to new building, don't i have to follow 225.30? it has to be on one switch correct? thanks for your reply! i know its early.
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Check out 225.33

225.33 Maximum Number of Disconnects.
(A) General. The disconnecting means for each supply
permitted by 225.30 shall consist of not more than six
switches or six circuit breakers mounted in a single enclosure,
in a group of separate enclosures, or in or on a switchboard.
There shall be no more than six disconnects per
supply grouped in any one location.
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Another possibility if the stars are aligned correctly :)
If you (3) existing 200 amp panels have mains and are located on exterior walls, you could feed a 600 amp (or smaller based on load) exterior main and apply 240.21(B)(5) to each of the panels as long as your taps remained outside up to the point of termination.
 
augie47 said:
Another possibility if the stars are aligned correctly :)
If you (3) existing 200 amp panels have mains and are located on exterior walls, you could feed a 600 amp (or smaller based on load) exterior main and apply 240.21(B)(5) to each of the panels as long as your taps remained outside up to the point of termination.
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thanks! what do you think about 225.30? if i would have run three separate disconnects would i have violated 230.30?
 
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MBLES said:
thanks! what do you think about 225.30? if i would have run three separate disconnects would i have violated 230.30?
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225.30 is about the number of supplies to the second building, not the number of disconnects. If you run three 200 amp supplies to the second building you are in violation. If you run one 600 amp supply and install three 200 amp disconnects at the second building you are in compliance.
 
Is this 2 diff addresses?
If bldg H has a service point with a 800 amp service that is not feeding the. 3 200 amp panels. Whats feeding them now?
 
don_resqcapt19 said:
225.30 is about the number of supplies to the second building, not the number of disconnects. If you run three 200 amp supplies to the second building you are in violation. If you run one 600 amp supply and install three 200 amp disconnects at the second building you are in compliance.
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i thought that's what it meant. i was a little confused about it from another comment. thanks
 
electricalist said:
Is this 2 diff addresses?
If bldg H has a service point with a 800 amp service that is not feeding the. 3 200 amp panels. Whats feeding them now?
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its one address. the T buildings are being feed off original H frame. A feeder is being extended about 150' to a temp building location.
 
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electricalist said:
It sounds like 2 seperate services exist, if yo combine them . the T bldg is where i would start
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We are not looking at a service here but if we were it would still be one service if one set of conductors are run. You can have 6 meters feeding 6 units and it is still one service. The number of services ks based on the number of service drops, laterals etc that are installed. If you had a buolding with a 208/120 volt system and a 480/277 volt system , no transformer but two drops from the power company, then you have two services
 
MBLES said:
iWIRE the service isn't going thru building its over head to another building.
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Sorry I meant Im not running a service im extending from original H frame to another H frame wanting to hang 600a disconnect
to another H frame to feed T building plural. i need 3 disconnects to go with it because there are 3 panel boards inside in separate locations.

im just asking can I code wise run 3 separate feeders to each panel or do i need to run one feeder then branch off to other panels. Apparently per code it needs to be 1 feeder.

I am just asking so I can have different ideas and proposals. Per Code not what i can get away with.
 
You can run one feeder from building one to a location on building two and then install a panel and feed the other buildings from that panel.
 
You had the basic concept in your early post. 225.30 one building can only be fed by one feeder or branch circuit (there are exceptions that don't seem to apply in your situation). If your three structures are structurally combined to make one building then you can run only one feed to that building and follow 225.33-40 at the 2nd structure.
 
Dennis Alwon said:
You can run one feeder from building one to a location on building two and then install a panel and feed the other buildings from that panel.
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Dennis all reply welcome so don't stop

i have a T building 150 away from exiting H frame service. i need to feed three separate 200a panels on t building. the feeder needs to be ran over head to new H frame that will support disconnects for t buildings. Accoridng to 225.30 it has to be a single feeder run to h frame then I can
feed to gutter that feeds disconnects to each 200a panel inside T building. does that make any since?

im asking for ideas. BTW can i hang the New 600a disconnect that will feed the feeder to the new H frame with gutter then 200a disconnects. or do i need to hang disconnect at New H frame location.
 
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