ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
GFCI's pops in large numbers
by dsk - 10/21/21 02:03 AM
Need some info on Japanese outlets, 200V 15A
by andey - 10/20/21 08:05 AM
Wire sizing
by watersparkfalls - 10/19/21 07:27 AM
nec 110.3 (B)
by watersparkfalls - 10/19/21 07:09 AM
A 5-20(20a) receptacle is legal on a 15a circuit?
by libellis - 10/10/21 12:46 PM
New in the Gallery:
240/208 to a house
240/208 to a house
by wa2ise, October 9
Now you know.
Now you know.
by Tom_Horne, September 7
Who's Online Now
0 members (), 8 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
Joined: Dec 2003
Posts: 524
Member
... Hi gang, I'm planning on running a 60 amp, 240 volt, single phase feeder out to a detached garage to a sub-panel...my question is... do I need a ground rod out there, or will the bare grounding wire in the SER cable suffice?? I'm using 1-1/4" pvc pipe to go underground, but if I don't use SER, and just pull THHN,..does the grounding conductor then have to be insulated??

Thanx....


.."if it ain't fixed,don't break it...call a Licensed Electrician"
Joined: Mar 2005
Posts: 212
G
Member
Can't quote chapterand verse since I don;t have the book right here, but if you are feeding a panel in a seperate building it must be seperately grounded and since you will be using PVC as a raceway you don't need to pull a ground wire at all. Why would you even consider SER in a raceway?

Joined: Jan 2005
Posts: 5,316
Cat Servant
Member
Feeder, separate building ... need a ground rod.

Whatever method you use, I recommend treating it as a 'sub-panel.' That means having a ground wire back to the main panel, and keeping the neutrals and grounds apart.

Joined: Mar 2005
Posts: 212
G
Member
While I agree with Reno's interpretation of this issue, around here the inspectors consider a ground wire with the feeder and a seperate ground rod or two to be parallel grounding.

Joined: Jul 2004
Posts: 9,667
Likes: 6
G
Member
If you didn't rebond the neutral in the far panel your inspectors would be wrong. In fact, in 2008 250.32(B)(2) will be gone and you will be required to run a 4 wire feeder.


Greg Fretwell
Joined: Aug 2006
Posts: 356
Member
250.32 (A) and 250.32(B)(1)(2)
I don't think insulated or not will make a difference on the EGC. I would run an EGC and install a separate ground rod and bond the EGC to it, however, I do not bond the grounded conductor to the grounding bar.

Edward


Be kind to your neighbor, he knows where you live

Joined: Nov 2005
Posts: 31
J
Junior Member
There is apparently many ideas on how to to this, but the current code is that you run a four feeder and use an insulated ground wire once you leave the main building and go into the ground. And you separate the ground bar and neutral. In our area the the AHJ will tell you to remove the ground rod, paralell path.

Joined: Apr 2001
Posts: 449
F
Member
You must install a grounding electrode at the structure served! How in the world do these AHJs get around 250.32(A)? An AHJ who makes you remove a ground rod from a structure served by a feeder needs to be re-educated.

Joined: May 2007
Posts: 3
R
New Member
I recently fed a detached garage in our area. The local AHJ requires a four-wire feed in addition to two (that's right - two!) 8' ground rods - 6' apart with a #4 copper conductor. The garage is 10' from the house which also has two ground rods in addition to the cold water bond also a #4. That gives me 4 ground rods in a 25' radius plus the cold water bond. All #4.

Joined: Sep 2006
Posts: 58
Y
Member
I'm too lazy to open the book. I believe the egc is necessary if there is any metallic connection to the main structure, such as water pipe , gas, etc. The ground rod IS REQUIRED even if an egc is pulled in.

Page 1 of 2 1 2

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

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

 

Member Spotlight
togol
togol
NW In. USA
Posts: 421
Joined: September 2005
Top Posters(30 Days)
dsk 6
Popular Topics(Views)
284,715 Are you busy
217,341 Re: Forum
203,693 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5