Service Grounding Bushings

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Mtnskiskate1

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Quick question fellas;
Inspector is telling me in addition to having ground bushings on my service conduits ( which I already have installed) in the service disconnect, he would like to see the output (feeder) conduits to also have ground bushings. I see his logic in 250.92 as they are in service enclosures, just wanted a second opinion. No concentrics ( clean KOs) and nothing over 250 volts to ground (208 v Y).
Thanks for your help.
 
The conduits on the load side of the service in your case would not require bonding bushings so it's up to you as to whether or not you want to use them. If don't use them and he insists ask for a code reference because he is incorrect.
 
Worlds Gr8est Electrician said:
He appears to be correct to me. Although you are not restricted to using bonding bushings since it says you only have to use one method given in 250.92 (B) and 250.8
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infinity said:
The conduits on the load side of the service in your case would not require bonding bushings so it's up to you as to whether or not you want to use them. If don't use them and he insists ask for a code reference because he is incorrect.
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I have never been asked to do this in the past 40 years. Think we have done it many times as an added measure of safety, material pricing is making me look a little harder at things.
Thanks for your help
 
Mtnskiskate1 said:
Inspector would like to see the output (feeder) conduits to also have ground bushings.
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Yes, and I would like the world to live in harmony. It really is too bad when an inspector says "I would like..." It is almost as if he/she is saying you need to keep me happy and do it my way. It is totally unfair. Sure there are many things in the code that some of us regard as basic and we do more than what's required but they have no right forcing it upon the contractors.
 
Worlds Gr8est Electrician said:
Could someone edumacate me on how the inspector is wrong. I have read the code and the post several times. What am I missing. I like to learn. Help me out.
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The conduit on the load side of the service disconnect contains feeder conductors and as such "normal" grounding rules apply and no extra bonding is required. The conduit on the line side contain service conductors and require "special" bonding such as a grounding bushing per 250.92.
 
250.9
Worlds Gr8est Electrician said:
Could someone edumacate me on how the inspector is wrong. I have read the code and the post several times. What am I missing. I like to learn. Help me out.
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250.92 refers to raceways that contain SERVICE conductors.
The conductors on the load side of a service overcurrent device are FEEDERS so 250.92 does not apply (at this voltage)
 
augie47 said:
250.9

250.92 refers to raceways that contain SERVICE conductors.
The conductors on the load side of a service overcurrent device are FEEDERS so 250.92 does not apply (at this voltage)
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I understand that. But the code also says

"(2)
All enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor"

I guess as long as the enclosure was bonded than the feeder conduit touching the enclosure would not need to be. So I guess he would be wrong but I see how he could think that the feeder conduit is part of the "normally non–current-carrying metal parts of equipment"

"The normally non–current-carrying metal parts of equipment indicated in 250.92(A)(1) and (A)(2) shall be bonded together."
 
It's an understandable misinterpretation:
(A) Bonding of Equipment for Services. The normally non– current-carrying metal parts of equipment indicated in 250.92(A)(1) and (A)(2) shall be bonded together.
So you are bonding the following:

(1) All raceways, cable trays, cablebus framework, auxiliary gutters, or service cable armor or sheath that enclose, contain, or support service conductors, except as permit‐ ted in 250.80
(2) All enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor

The feeder conduits don't meet that requirement as they don't contain service conductors.
 
Worlds Gr8est Electrician said:
All enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor"
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The feeder raceway is not interposed in the service raceway so that section does not apply to the feeder. I had a long discussion with someone about this a few years ago. They stated that the raceways leaving the service with feeder conductors still required bonding bushings because they are in the same service enclosure. They missed the interposed part.
 
infinity said:
The feeder raceway is not interposed in the service raceway so that section does not apply to the feeder. I had a long discussion with someone about this a few years ago. They stated that the raceways leaving the service with feeder conductors still required bonding bushings because they are in the same service enclosure. They missed the interposed part.
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Thanks I missed it to and looked up the definition. I would agree with you.
 
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