GEC in Meter Can

Mason34

Member
Location
Texas
Occupation
QA
Our local utility has a requirement for electricians to install a copper conductor from their meter can directly to a ground rod and sized per 250.66. The copper conductor should be installed so that it does not enter the service disconnect enclosure even if the service disconnect enclosure is mounted below the meter can as well on a temp pole for a site trailer. I understand that the grounding electrode connection can be made from the meter can enclosure per 250.24, but it requires this to terminate where the grounded service conductor is connected at the service disconnect.

How are electricians installing their GEC at the grounded conductor in the meter can enclosure but also at the service disconnect?

Since the bond is happening in the meter can, is the service disconnect still required to be bonded?

If bonding still needs to occur at the service disconnect, is it acceptable to have a bond in the meter can, with the copper conductor (GEC) routed directly to the ground rod (instead of going to the SE disconnect) Then, would it be acceptable to install only the grounded and ungrounded conductors from the meter can to the service disconnect, bond the grounded and ungrounded conductors at this point, and run a new copper conductor sized according to 250.66 to a separate ground rod? Note that our utility grounds their neutral conductor at the transformer.

Our utility has provided an illustration and I prefer to have everything at the service disconnect but need to comply with the utilities requirement as well. In the illustration, it shows only the ungrounded and grounded conductors going from the meter can to the SE disconnect with a bonding jumper to bond the neutral and equipment grounds together. However, it doesn't show another copper conductor in the SE disconnect to a separate ground rod which I don't believe fully complies with 250.24.
 
The service disconnect is where the MBJ will be installed regardless of where the GEC connection to the service neutral is made.
 
Here is what it would look like. The illustration shows a PVC nipple, it can be metallic but using metal put's it in parallel with the neutral.

1743524480519.png
 
You still bond the neutral to the EGC in the disconnect. The GEC can be connected in the meter, but not every utility allows it. It's cool yours does.
 
Since the bond is happening in the meter can, is the service disconnect still required to be bonded?
Yes the service disconnect must have a MBJ. It does not need to have its own GEC. If there is a GEC upstream from the service disconnect, like in the meter, that connects to the GES that's all that's required.
 

Yes the service disconnect must have MBJ. It does not need to have its own GEC. If there is a GEC upstream from the service disconnect, like in the meter, that connects to the GES that's all that's required.
Would their be an issue with an additional GEC being installed at the disconnect to another ground rod?

Essentially the current install is like the picture Roger posted but has another GEC installed to an additional ground rod in the service panel.
 
Here is what it would look like. The illustration shows a PVC nipple, it can be metallic but using metal put's it in parallel with the neutral.

View attachment 2576493
Thanks for the illustration. The current install has an additional GEC installed at the panel to an additional ground rod. I feel like this creates a parallel path. What are your thoughts?
 
Would their be an issue with an additional GEC being installed at the disconnect to another ground rod?

Essentially the current install is like the picture Roger posted but has another GEC installed to an additional ground rod in the service panel.
No there is not an issue. Multiple GEC's can terminate at different points ahead of the service disconnect.
 
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