ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by SteveFehr. 07/23/17 09:46 AM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,265 Are you busy
174,724 Re: Forum
167,104 Need opinion
Who's Online Now
0 registered members (), 57 guests, and 10 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
mersadrad
mersadrad
Montreal, Quebec, Canada
Posts: 28
Joined: March 2011
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.011s Queries: 14 (0.002s) Memory: 0.7431 MB (Peak: 0.8597 MB) Zlib enabled. Server Time: 2017-07-24 06:32:47 UTC