The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
Safety at heights?
by gfretwell
01/21/17 02:19 AM
Looking for older post
by Trumpy
01/21/17 01:04 AM
Last time to chat here
by Trumpy
01/20/17 11:41 PM
Unsafe Situations
by Trumpy
01/20/17 09:46 PM
Webmaster > Admin
by Trumpy
01/20/17 08:29 PM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
Admin 35
HotLine1 20
Trumpy 19
Ruben Rocha 17
gfretwell 16
Who's Online
1 registered (NORCAL), 167 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#16465 - 11/11/02 07:03 PM Driven Rod?
arseegee Offline

Registered: 01/28/02
Posts: 321
Loc: Statesboro, GA USA
On a job that has 1200A 208Y service CT can at xfmr. I have a copper water pipe ground and steel structure ground. My GEC shall be 2/0cu to structure.

My helper(lead man) is wanting to drive several rods to form a grid and take the GEC to the grid I say take it to the structure.

If we drove rods, would the GEC be a #6 as the 2002 code states (250.66)? Or is that for a single rod electrode?

[This message has been edited by arseegee (edited 11-11-2002).]

Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#16466 - 11/11/02 10:14 PM Re: Driven Rod?
nesparky Offline

Registered: 06/21/01
Posts: 650
Loc: omaha,ne
Where is the service disco?

#16467 - 11/12/02 02:54 AM Re: Driven Rod?
sparky Offline

Registered: 10/18/00
Posts: 5545
a few issues at hand here arseegee, i can realte to wanting to ground the s#@! outta everything, i think it's simply inherent in us......

IMHO,it would seem that providing g-rods to the structure would mimic a lightning rod installation, simply aiding the structure in bleeding off a lightning strike.

in terms of an incomming charge to the service itself, a closer grid is a better grid, lower ohmic value following suit....( all..)

the reduction of GEC size for "sole electrodes" , to my understanding, means they are all run back to the MBJ individually, applicable to all except A-C in 250.66
Assumably Kirchhof's laws apply here to latter charge....

as to the MBJ, ( and this is a tad of a highjack) , i've ended up in 366.7
(1000a per square inch of cu, 700a for al)
wondering about the last sentron unit's intergrity , with tape measure in hand....


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals