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#216079 - 09/25/15 01:19 AM bonding bushing  
watersparkfalls  Offline
Member
Joined: Mar 2005
Posts: 216
Washington...Not DC
what is the code article that specifically states where and when bonding bushing is required for transformers?
I am installing a transformer with concentric knockouts that
I won't knock all out, usually I knock out my own eccentric and don't need one.

I beleive it is only required on the load side?

What if I bond XO at panel where I punch my own, would I still need one in x-former?

Thanks,
H20


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#216080 - 09/26/15 09:25 PM Re: bonding bushing [Re: watersparkfalls]  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
I think the general rule you use bonding bushings on raceways containing unfused conductors like services. I suppose if you have a transformer secondary conductor before it gets to the first O/C device it should have bonding bushings but I am not sure that is code.


Greg Fretwell

#216091 - 09/30/15 08:56 PM Re: bonding bushing [Re: watersparkfalls]  
renosteinke  Offline
Cat Servant
Member
Joined: Jan 2005
Posts: 5,316
Blue Collar Country
I think Soares is the source of this.

I think in terms of the bonding bushings being used on the 'service' side of any separately derived source, over that portion where the 'ground' is lacking and before the neutral bond.


#216140 - 10/12/15 09:05 PM Re: bonding bushing [Re: watersparkfalls]  
Yoopersup  Offline
Member
Joined: Mar 2003
Posts: 822
Michigan
Don't forget 250.97 2014 N.E.C. . Bonding over 250 volts to ground .



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