4000 amp gen breaker enclosure bonding bushings

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Don Romano

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Location
new york
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electrical contractor
after sizing in sec 250 wire is tremendous, what type of bushing and lug can be used to accomplish this project
 
You can use individual bond jumpers to each bushing based on the conductor in that conduit
(Note 3 to 250.102(C))
 
augie47 said:
You can use individual bond jumpers to each bushing based on the conductor in that conduit
(Note 3 to 250.102(C))
Click to expand...
True but that only is allowed on service conductors or supply conductors on a SDS. If this is on the load side of the generator breaker they will need to be sized on 250.122 and 4000 amps which would be 500 KCMIL for every pipe.
 
When I saw "generator" I was thinking SDS but thanks for the reminder.
I am correct that one option would be to loop (1) 500 to multiple conduits, correct ?
 
On several occasions I have replaced the lug on a bonding bushing with a larger one if it didn't go big enough. Agree with infinity, why do you need bonding bushings? Is this just feel good bonding? Is a bonding lock nut an option?
 
Would you care to give a little detail.
I think many of us are trying to picture a generator application that requires bond bushings especially with no concentric KOs
 
augie47 said:
Would you care to give a little detail.
I think many of us are trying to picture a generator application that requires bond bushings especially with no concentric KOs
Click to expand...
Yes. Could be a job spec but I agree it's sounding like they're not required. But even so the question is about using them so just swap out the lugs for larger ones.
 
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