Grounding Electrode Conductor at Common Location

Fred B

Senior Member
Location
Upstate, NY
Occupation
Electrician
If no other overcurrent ahead of the trough taps then the GEC would be no different than doing N/G bond at weather head, or meter and sized accordingly. But, remember N/G bond at one location only. The enclosure in illustration would require a seperate EG bar to land the EGC and eliminate the bonding jumper from the neutral bar.
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
Ah. So that means Pic B is invalid, and you cannot make those connections? Meaning Pic C, that I attached here, is the correct way when you are ahead of the disconnects? So this fits into section (D)(3) then, with the common connection? Here I would size the GEC based on the 350 MCM service entrance conductors.

Pic C
View attachment 2557915
Exactly, instead of using "taps" like in your original pic B you just run the GEC directly to a point ahead of the service disconnects. It is sized according to Table 250.66. For 350 kcmil Cu it would be a #2 Cu GEC.
 

Grouch1980

Senior Member
Location
New York, NY
Exactly, instead of using "taps" like in your original pic B you just run the GEC directly to a point ahead of the service disconnects. It is sized according to Table 250.66. For 350 kcmil Cu it would be a #2 Cu GEC.
Perfect. That was my confusion, if pic B was a valid method of connection or not. So no then. Great! Thanks for the help in this.
 
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