Grounding wire for 200A Service

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and no one wants to end up like this guy ....I just love this graphic:smile:


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buckofdurham said:
And useing metal conduit you would be required to have a grounding bushing on one side of the nipple or the other. Not one on each side.
If you are not useing eccentric knock outs you could use a grounding lock nut. Or a grounding bushing. But still only one side would be requires.
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Where do you get relief to bond only one side and which side would you not bond. With that theory, a bonding bushing would only be required on one side. Article 250.92 says all service enclosures shall be bonded together. To me that means each enclosure individually. I see in some of the Mike Holt pictures he only bonds one side,but is that accurate?
 
RUWired said:
Where do you get relief to bond only one side and which side would you not bond. With that theory, a bonding bushing would only be required on one side. Article 250.92 says all service enclosures shall be bonded together. To me that means each enclosure individually. I see in some of the Mike Holt pictures he only bonds one side,but is that accurate?
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The enclosure is bonded thru the neutral. I believe the bond is only bonding the conduit bewteen the enclosures.
 
Dennis Alwon said:
The enclosure is bonded thru the neutral. I believe the bond is only bonding the conduit bewteen the enclosures.
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I agree. The bond (IMO) is providing a fault path in case of a fault inside the conduit. The enclosures on each side (meter can and service disconnect) are bonded throught the Neutral.
 
I haven't seen a service with metal pipe use plastic bushings ever, even with one side bonded. The way i read it, each conduit and enclosure needs .
250.92 Services.
(A) Bonding of Services. The non?current-carrying metal parts of equipment indicated in 250.92(A)(1) and (A)(2) shall be bonded together.
(1) The service raceways, cable trays, cablebus framework, auxiliary gutters, or service cable armor or sheath except as permitted in 250.84
(2) All service enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor
 
RUWired said:
I haven't seen a service with metal pipe use plastic bushings ever, even with one side bonded. The way i read it, each conduit and enclosure needs .
250.92 Services.
(A) Bonding of Services. The non?current-carrying metal parts of equipment indicated in 250.92(A)(1) and (A)(2) shall be bonded together.
(1) The service raceways, cable trays, cablebus framework, auxiliary gutters, or service cable armor or sheath except as permitted in 250.84
(2) All service enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor
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Why would you need to bond both sides of a galvanized nipple? If you bond one end the conduit is bonded.
 
Dennis Alwon said:
Why would you need to bond both sides of a galvanized nipple? If you bond one end the conduit is bonded.
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I agree with you Dennis, although I see it commonly done it is not required.

As an example I doubt many people are bonding the top end of an RMC riser at the weather head.
 
Every inspection i ever had required both sides.Doesn't mean right or wrong. The way i read into the article, i see both sides are required.I understand both enclosures are bonded via the screw,wire or buss,but not the raceway.
 
RUWired said:
I haven't seen a service with metal pipe use plastic bushings ever, even with one side bonded. The way i read it, each conduit and enclosure needs .
250.92 Services.
(A) Bonding of Services. The non?current-carrying metal parts of equipment indicated in 250.92(A)(1) and (A)(2) shall be bonded together.
(1) The service raceways, cable trays, cablebus framework, auxiliary gutters, or service cable armor or sheath except as permitted in 250.84
(2) All service enclosures containing service conductors, including meter fittings, boxes, or the like, interposed in the service raceway or armor
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Where does this say to bond both sides? :confused:
 
Dennis Alwon said:
Why do ec's still use metal? Why not use PVC?
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I am kind of odd, (did I even have to say that?) for me it's either SE or if I think the SE is subject to damage it will be RMC. I am not really a fan of exposed PVC.

I have been known to use short PVC nipples between metering equipment and service disconnects in order to prevent a parallel path.
 
RUWired said:
Every inspection i ever had required both sides.Doesn't mean right or wrong. The way i read into the article, i see both sides are required.I understand both enclosures are bonded via the screw,wire or buss,but not the raceway.
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So what do you do about the vertical riser from a meter socket?

Do you bond the top end of that?
 
iwire said:
I am kind of odd, (did I even have to say that?)
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Aren't we all...

for me it's either SE or if I think the SE is subject to damage it will be RMC. I am not really a fan of exposed PVC.
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This I don't understand. It cost more and there is more work involved. I have never seen a piece of PVC (usually a coupling with slip fittings in the ends) go bad on a service.
 
I underlined the parts that i think says it. All enclosures to me means each individually at each,not an enclosure via another enclosure.
 
RUWired said:
I underlined the parts that i think says it. All enclosures to me means each individually at each,not an enclosure via another enclosure.
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A neutral conductor is bonded to the base of the meter then passes thru the meter to the main disco and it in turn is bonded to the enclosure. The enclosures are bonded now all that is need is to bond the nipple. One side is all that is necessary. The nipple is not boning the enclosure the neutral is and thus the enclosure is bonding the nipple.

Edit- to add "is"
 
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Dennis Alwon said:
This I don't understand. It cost more and there is more work involved. I have never seen a piece of PVC (usually a coupling with slip fittings in the ends) go bad on a service.
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It's plastic, IMO plastic is not the answer if I have decided the area is subject to damage, and yes I know the NEC says 80 PVC is OK but I do not agree.
 
Dennis Alwon said:
A neutral conductor is bonded to the base of the meter then passes thru the meter to the main disco and it in turn is bonded to the enclosure. The enclosures are bonded now all that is need is to bond the nipple. One side is all that is necessary. The nipple is not boning the enclosure the neutral is and thus the enclosure is bonding the nipple.
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Exactly to the point. You're only bonding the service raceway, it's not needed for a bonding connection between the meter enclosure and the panel.

And one comment on Bob's statement about Sch 80 PVC, If I were installing this in a parking lot I would go with RMC too. IMO Sch 80 has it's place but not everywhere.
 
infinity said:
And one comment on Bob's statement about Sch 80 PVC, If I were installing this in a parking lot I would go with RMC too. IMO Sch 80 has it's place but not everywhere.
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If the nipple is between a panel and a meter how is that going to get hit by a car without hitting the panels and the meter.
 
Dennis Alwon said:
If the nipple is between a panel and a meter how is that going to get hit by a car without hitting the panels and the meter.
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Most of the panels here are located inside of the building and the meter is one the outside well above the height of a car bumper. Now if they're both on the outside that a different story.;)
 
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