Grounding Bushing

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If a ground wire is pulled through the raceway and landed on a disconnect for a rtu. The raceway is going through concentric ko is a bond bushing required?
 
George,

I knock out or drill out all 480/277 enclosures with concentric,eccentric pry

out type ko's, unless the largest size is what I'm using. I feel the small amount

of time it takes is well worth it and never a red tag!!
 
Grounding Bushings

Grounding Bushings

I have a similiar question relating to ground bushings on which I need an expert opinion on code. Article 250.92 B-3 says treadless couplings & connectors made up tight are allowed as one the four methods to insure electrical continuity at service equipment. The last paragraph in section B notes eccentric and concentric KO's require bonding jumpers. Then the last sentence says "Standard locknuts or bushings shall not be the sole means for the bonding required by this section". It is my understanding and that of my engineer consultant that the restriction on depending on locknuts for continuity applies to the preceeding sentence RE pre-punched KO's and or threaded conduit with two locknuts, one on each side. It appears to me that EMT with a steel raintite connector made up tight to the enclosure is acceptable for service conduits and grounding electrode conductor continuity.
The inspection department on a current job interprets the last sentence on standard locknuts and bushings to apply to the whole section, requiring ground bushings ond bonding conductors on all conduits containing service conductors or grounding wires. I have tried to point out that if this were true then 250-92 B3 is erronious and the need to bond around pre-punched KO'S is superflous, as you have to bond around everything, however they stick to their interpretation. They said if I could produce an experts opinion that my understanding is correct they would like to see it. Help!!!
 
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