ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Recent Posts
VFD MotorFeeders
by gfretwell. 10/19/17 01:02 AM
Generator Cable Sizing
by brsele. 10/18/17 07:39 PM
What do you do?
by gfretwell. 10/17/17 01:08 AM
Good ol' copper pipe in the fuse holder trick
by HotLine1. 10/16/17 07:16 PM
Another generator question
by HotLine1. 10/16/17 07:02 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
241,402 Are you busy
177,364 Re: Forum
168,970 Need opinion
Who's Online Now
0 registered members (), 55 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#99819 - 09/18/06 11:15 AM Sub Panel  
kyelectric  Offline
Member
Joined: Aug 2005
Posts: 64
I was wondering which way is the most common way or best way to feed to a new panel. I am installing a 100 A panel in an detached garage. The feed will come from a 200 A panel in a garage that is close by. There are two ways to do this I believe...First you can run something like USE-2 in a 2-2-2-4 and the 4 can be the grounding conductor for all the circuit grounds as long as the panel does not have the neutrals and grounds bonded. The second way would be to treat it as a new service and run something like 2-2-4 and have the 4 be the grounded conductor and then start a new grounding system there with new ground rods. Which way is best? Thanks.


2017 / 2014 NEC & Related Books and Study Guides

#99820 - 09/18/06 01:06 PM Re: Sub Panel  
earlydean  Offline
Member
Joined: Dec 2003
Posts: 751
Griswold, CT, USA
The 4-wire connection is the best. A main CB and a grounding electrode system is required in either case. With the three wire connection you have to worry about parallel paths on the grounding electrode system with the grounded conductor. Not a problem with the 4-wire.


Earl


Member Spotlight
Admin
Admin
NY, USA
Posts: 3,458
Joined: October 2000
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.012s Queries: 14 (0.003s) Memory: 0.7437 MB (Peak: 0.8584 MB) Zlib enabled. Server Time: 2017-10-20 01:32:53 UTC