ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Do You Wrap Your Receptacles?
by gfretwell - 02/20/24 10:48 PM
Cable Chase Code Requirement
by renosteinke - 02/16/24 07:00 PM
Do we need grounding?
by gfretwell - 02/16/24 10:37 AM
Cordless Tools: The Obvious Question
by gfretwell - 02/08/24 07:28 AM
Is this really a thing
by renosteinke - 02/07/24 01:15 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
1 members (Scott35), 47 guests, and 23 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Mar 2003
Posts: 849
Y
Member
Question
6 - sets of 4 600 MCM copper to service .
By 250.66
Ground wire size to Water Line?

Calculations Please

Stay up to Code with the Latest NEC:


>> 2023 NEC & Related Reference & Exam Prep
2023 NEC & Related Reference & Study Guides

Pass Your Exam the FIRST TIME with the Latest NEC & Exam Prep

>> 2020 NEC & Related Reference & Study Guides
 

Joined: May 2005
Posts: 984
Likes: 1
G
Member
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
Joined: Mar 2003
Posts: 849
Y
Member
So with the Chart 3/0 is the Size to the water line.

Joined: Mar 2003
Posts: 849
Y
Member
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.

Joined: Jul 2004
Posts: 9,917
Likes: 29
G
Member
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
Joined: Apr 2002
Posts: 7,380
Likes: 7
Member
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

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC + Exam Prep Study Guides Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Admin
Admin
NY, USA
Posts: 3,682
Joined: October 2000
Top Posters(30 Days)
maxecn 5
Admin 3
Popular Topics(Views)
317,954 Are you busy
242,875 Re: Forum
226,875 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5