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#63024 - 03/04/06 05:49 PM Bonding  
Sparks30  Offline
Member
Joined: Mar 2002
Posts: 125
Connecticut.usa
I have a ongoing thing with my boss about bonding, we are doing a 450ft run of 4/0 and #2 ground. Going though 4 j-box's. There are no concentic k.o's all are punched, I say we should use bonding bushings not just locknuts for the bond. He says just plastic bushings. Who would be right. Thanks Sam

( This is a panel off the main gear )

[This message has been edited by Sparks30 (edited 03-04-2006).]


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#63025 - 03/04/06 06:55 PM Re: Bonding  
bot540  Offline
Member
Joined: Sep 2004
Posts: 174
Vernon Hills, IL
While bonding bushings would not be a bad idea you don't need them. You only need them if using concentric or ecentric knockouts. Read 250.92 and 250.97


Jesus may have been a capenter,but God was an electrician.Genesis1:3

#63026 - 03/05/06 12:23 AM Re: Bonding  
Yoopersup  Offline
Member
Joined: Mar 2003
Posts: 826
Michigan
2005 NEC 250.92 is for services . As this is a feeder . (250.97) deals with Bonding over 250 volts to ground. If this was a 120/240 or 120/208 volt. Bonding bushings on a feeder would not be required Even if concentric or ecentric was involved. IF they were in good condition.


#63027 - 03/05/06 12:46 AM Re: Bonding  
bot540  Offline
Member
Joined: Sep 2004
Posts: 174
Vernon Hills, IL
Most inspectors around here(Northern Illinois) make you put them on with concentric or ecentric knockouts. Especially for feeders.


Jesus may have been a capenter,but God was an electrician.Genesis1:3

#63028 - 03/05/06 10:03 AM Re: Bonding  
Sparks30  Offline
Member
Joined: Mar 2002
Posts: 125
Connecticut.usa
When the inspector looked at the underground branch he said he would be looking for the rigid sweeps and EMT to be grounded. Thanks for the input. Sam



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