ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Upgrade the old panel
by gfretwell. 08/19/18 04:38 PM
IRC M1307.3
by gfretwell. 08/18/18 09:08 AM
Light Pole Grounding
by Mosfet74. 08/18/18 08:42 AM
Calling all Non-US members!! (Non-US only)
by Bill Addiss. 08/13/18 05:52 PM
depth of duckbank
by ghost307. 08/12/18 09:26 PM
New in the Gallery:
Plug terminals
Housebilding DIY wiring
Who's Online Now
1 registered members (gfretwell), 3 guests, and 21 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Ground wire Size to water Line. #218870
12/04/17 11:10 AM
12/04/17 11:10 AM
Y
Yoopersup  Offline OP
Member
Joined: Mar 2003
Posts: 845
Michigan
Question
6 - sets of 4 600 MCM copper to service .
By 250.66
Ground wire size to Water Line?

Calculations Please

2017 / 2014 NEC & Related Books and Study Guides
Re: Ground wire Size to water Line. [Re: Yoopersup] #218871
12/04/17 12:43 PM
12/04/17 12:43 PM
G
ghost307  Offline
Member
Joined: May 2005
Posts: 947
Chicago Illinois USA
According to the table, anything larger that 1,100 kcmil requires 3/0 Copper (or 250 kcmil Aluminum).
Since you're running parallel sets, you need to run that size ground wire with each set.

Calculations are:
(6) 600 MCM = 3,600 MCM
3,600 MCM > 1,100 MCM


Ghost307
Re: Ground wire Size to water Line. [Re: Yoopersup] #218872
12/04/17 01:46 PM
12/04/17 01:46 PM
Y
Yoopersup  Offline OP
Member
Joined: Mar 2003
Posts: 845
Michigan
So with the Chart 3/0 is the Size to the water line.

Re: Ground wire Size to water Line. [Re: Yoopersup] #218873
12/04/17 01:58 PM
12/04/17 01:58 PM
Y
Yoopersup  Offline OP
Member
Joined: Mar 2003
Posts: 845
Michigan
A Ground wire does not go with the Conductors . (only Equipment Grounds go with conductors ,)
This is from the Service Panel to the water line.

Re: Ground wire Size to water Line. [Re: Yoopersup] #218874
12/04/17 05:24 PM
12/04/17 05:24 PM
G
gfretwell  Online Content

Member
Joined: Jul 2004
Posts: 9,253
Estero,Fl,usa
I read the chart to say 3/0 is the biggest conductor you ever need and I agree the grounding conductor does not need to be run in each set. They are not usually even going to the same place.


Greg Fretwell
Re: Ground wire Size to water Line. [Re: Yoopersup] #218879
12/05/17 01:11 PM
12/05/17 01:11 PM
HotLine1  Offline

Member
Joined: Apr 2002
Posts: 6,997
Brick, NJ USA
The water ground is max 3/0 Cu by NEC, however the design professional may spec something larger. Terminations are at the street side of the water main, and on a compliant sized lug within the main OCP enclosure on the neutral buss.

This conductor does not go with the feeder conductors, as others have said


John

Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
MarkC10
MarkC10
CA, Inland Empire
Posts: 43
Joined: September 2013
Show All Member Profiles 
Top Posters(30 Days)
BigB 3
Popular Topics(Views)
248,629 Are you busy
186,369 Re: Forum
175,846 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.018s Queries: 15 (0.003s) Memory: 0.9763 MB (Peak: 1.1244 MB) Zlib enabled. Server Time: 2018-08-19 21:48:44 UTC