Hot Gutter

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KMeni

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Project has 225A 208Y/120V 3P 4W Hot Gutter 250' down stream from its 225A Main Circuit Breaker, is this Code Violation. Also the 225A Hot Gutter feeds (2) 225A Sub Panelboards and (1) 125A Sub Panelboard with a combined calculated connected load of 320A.
 
brian john said:
What is a HOT gutter???????
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Not sure what a hot gutter is but it sounds like he's describing feeder taps and that depends on how long the taps are. Maybe its a gutter with buss bars in it that is being tapped to feed the panels.
As far as the gutter being 250 feet away from the breaker being a code violation we need more info than that.
 
I'm going to take a stab and say he's talking about a Buss Duct (article 368), although I have never seen buss duct that small, smallest I have worked on was 600 amps up to 3ka, if the buss duct is protected by the correct OCPD then I see no problem if they are not tripping the OCPD, and as far as I know, buss duct only needs disconnect at the feed end just like any circuit conductors, in one plant, we had a 2Ka 480 volt buss duct that had the disconnect/OCPD all the way across the plant in the MDP, it was fed from the MDP to the feed end of the buss duct with 5/750Kcmil's TW and the only disconnect was the breaker in the MDP.

Saying that the calculated load is 320 amps sounds too rounded off, as in most cases you should never come up with exactly 320 amps? How did you do this calculation?
 
a load of 320A on a 225A main sounds like a violation if it is 320A on all 3 phases, but not if it is only a bunch of 120V loads.
 
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