Equipment ground between utility meter and main service disco

[hhsting]

I have plans which show incoming service conductors from poco into utility meter /junction box and from their into main service panelboard A.

In the junction box their is neutral to ground bond and between utility meter and main service panelboard A their is #6 awg ground conductor along with phase and neutral conductors to main service panel A. Main service grounding electrode system is at junction box.

Please see attached sketch describing above.

Their is also neutral to ground bond at main service panelboard A

Question:

1. Does the NEC 2014 allow equipment grounding conductor between utility meter and main service panelboard A? I thought everything was suppose to be grounded by neutral if its grounded conductor line side service disco. Would the install not comply per NEC 2014 section 250.80?

 

[infinity]

The EGC will carry some of the neutral current which would violate the objectionable current code section.

 

[hhsting]

The EGC will carry some of the neutral current which would violate the objectionable current code section.

You mean objectionable current on line side of service disco? Does that matter? I mean isn’t their some objectionable current every install line side?

 

[augie47]

Your #6 bond to the service panel is undersized for 3/0 service. Other than that, if they separate the neutral and grounding buss in "A:" I see no real problem.
Unonventional and most POCOs would not want that j box.
(I may be over looking something that infinity sees)

 

[hhsting]

Your #6 bond to the service panel is undersized for 3/0 service. Other than that, if they separate the neutral and grounding buss in "A:" I see no real problem.
Unonventional and most POCOs would not want that j box.
(I may be over looking something that infinity sees)

Main bonding jumper neutral to ground bond must be in Panel A its main service disco 250.24(B). How what you say is possible?

 

[augie47]

I would consider the #6 (should be 4) from the neutral connection to the grounding bar in my panel as my bond jumper.

 

[hhsting]

I would consider the #6 (should be 4) from the neutral connection to the grounding bar in my panel as my bond jumper.

Panel A still has to have main bonding jumper no?

 

[augie47]

IMO, it does per post #6.
(Keyword there is IMO... would not be a 1st to be incorrect.. unconventional and not preferable and as mentioned likely not acceptable by POCO.. not worth my concern.. at my limit on a sting thread. carry on)

 

[don_resqcapt19]

EGCs and supply side bonding jumpers are not used on the line side of the service disconnect for a system has has a grounded circuit conductor. A wire type EGC or SSBJ would be a violation of the parallel conductor rules as it would be in parallel with the service grounded conductor.

I can't imagine a utility permitting the that junction box on the line side of their cash register...makes it too easy for someone to bypass the cash register.

 

[curt swartz]

I can't imagine a utility permitting the that junction box on the line side of their cash register...makes it too easy for someone to bypass the cash register.

The OP frequently posts "drawings" of projects that have multiple switchboards or panelboards before hitting the POCO meters. They definetly do things different than I have ever seen. The POCO's I work with will not allow anything before the meters other than a main breaker if more than 6 service disconnects for multi metering equipment.

 

[electrofelon]

The OP frequently posts "drawings" of projects that have multiple switchboards or panelboards before hitting the POCO meters. They definetly do things different than I have ever seen. The POCO's I work with will not allow anything before the meters other than a main breaker if more than 6 service disconnects for multi metering equipment.

I agree. Lots of the stuff OP comes across, I am surprised POCO allows.

OP I would call out a correction on the plans to remove that #6 conductor and cite 250.6(A) and (B)(1)

 

[Hv&Lv]

I can't imagine a utility permitting the that junction box on the line side of their cash register...makes it too easy for someone to bypass the cash register.

I may be wrong but I see what he is calling a “junction box” as a CT cabinet

 

[hhsting]

I may be wrong but I see what he is calling a “junction box” as a CT cabinet

No thats a junction box. This is 200A 208/120V service

 

[Hv&Lv]

So it’s a self contained meter base setup? What’s the junction box for?

Self contained metering for UG the feed comes in the bottom, hits the top lugs, through the meter then to the panel. No need for a junction box.

 

[hhsting]

So it’s a self contained meter base setup? What’s the junction box for?

Self contained metering for UG the feed comes in the bottom, hits the top lugs, through the meter then to the panel. No need for a junction box.

Plans call it junction box has main service grounding electrode conductor connection, neutral to ground bond and another neutral to ground bond in Panel A

 

[electrofelon]

So it’s a self contained meter base setup? What’s the junction box for?

Self contained metering for UG the feed comes in the bottom, hits the top lugs, through the meter then to the panel. No need for a junction box.

Could be just a utility connection/tap box" or whatever, where POCO conductors splice to NEC conductors. Not uncommon.

 

[electrofelon]

Plans call it junction box has main service grounding electrode conductor connection, neutral to ground bond and another neutral to ground bond in Panel A

I see no issue other than the weird/undersized bonding jumper thing

 

[hhsting]

I see no issue other than the weird/undersized bonding jumper thing

I agree it is wired so I already told designer to remove that jumper from plans and he did. Its now 3 phase conductors and 1 neutral conductor. So 4#3/0 awg nothing else between utility meter and main service panelboard A