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
International Wire Colour Codes
by Tjia1981
10/23/16 12:08 PM
Parking lot pole light swap....
by HotLine1
10/23/16 09:39 AM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 12
HotLine1 7
renosteinke 6
ghost307 5
Potseal 4
Who's Online
1 registered (Tjia1981), 194 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#81757 - 09/17/02 08:54 AM Articles 800 thru 830 Grounding
jes Offline

Registered: 07/12/02
Posts: 103
Loc: CT
Each of these Articles lists the location to which the grounding conductor for the particular system must be connected (ie. 800.40(B)(1)). For the most part the list is the same in each Article. Then there is another section in each Article that calls for the bonding of communications grounding electrode(s) to the power grounding electrode system (ie. 800.40(D)). My read of this says you can have as many electrodes as you want as long as they are bonded together to the power grounding electrode system. Has anyone interpreted this to mean you CANNOT have a separate electrode for communications systems at a structure that has a power grounding electrode system??

2014 / 2011 NEC & Related Books and Study Guides
#81758 - 09/17/02 06:25 PM Re: Articles 800 thru 830 Grounding
resqcapt19 Offline

Registered: 11/10/00
Posts: 2209
Loc: IL
I have always read these sections are requiring the communications system to use the power system grounding electrode, but these are very poorly worded sections of code. In the first part is says you must ues the building electrical system grounding electrode, but then it tells you how to bond a seperate communications grounding elctrode to the electrical system grounding electrode. 800.40(A)(4) seams to say that you can only use a communications grounding electrode if the communications system entrance is more than 20' from the power system grounding electrode system.
We need some proposals to fix this for the 2005 code.

#81759 - 09/18/02 02:44 AM Re: Articles 800 thru 830 Grounding
jes Offline

Registered: 07/12/02
Posts: 103
Loc: CT
Forget for a minute the system you are working on, if you install a made electrode per 250, and bond it to the power grounding electrode system via the required bonding conductor (#6 CU), doesn't your new electrode become part of the overall grounding electrode system?? You COULD do this all around a structure and still call it the power grounding electrode system, right? So based on that you could tie the communication system to this electrode system anywhere along it. What am I missing?

#81760 - 09/22/02 08:55 PM Re: Articles 800 thru 830 Grounding
Sean WB Offline

Registered: 09/15/02
Posts: 113
Loc: South TX
If it is more than 20' from communications to power sytem ground, you must use a seperate ground rod, and it can be a 5' ground rod, which I havent seen yet . And it must be bonded to power system ground rod
I did not get as think so badly as you shocked I did.


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