ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#99819 - 09/18/06 08:15 AM Sub Panel
kyelectric Offline
Member
Registered: 08/30/05
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.
Top
2017 / 2014 NEC & Related Books and Study Guides
#99820 - 09/18/06 10:06 AM Re: Sub Panel
earlydean Offline
Member
Registered: 12/22/03
Posts: 751
Loc: 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
Top

Member Spotlight
Member Since: 12/24/00
Posts: 4259
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
1 registered (Admin), 60 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
Stack, Scotto, Freecrowder, clee512, Jdscott2005

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