ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 12 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
3 wire sub panel #40440
07/20/04 06:01 AM
07/20/04 06:01 AM
D
derater  Offline OP
Member
Joined: Mar 2002
Posts: 179
Cust.,who is also a builder I work for, wants a sub panel in detached garage via the 3 wire he alresdy has; should I drive a ground rod there?

Work Gear for Electricians and the Trades
Re: 3 wire sub panel #40441
07/20/04 08:02 AM
07/20/04 08:02 AM
W
watthead  Offline
Member
Joined: Oct 2001
Posts: 172
South Carolina
Yes, but you should only use the three wire method if there is, and will be, no other metallic paths between the two structures. This includes metal water or gas pipe, telephone or other wires. If you have no other metal connection you should drive a rod or two per requirements, and bond to neutral like service equipment.

Re: 3 wire sub panel #40442
07/20/04 02:00 PM
07/20/04 02:00 PM
I
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Great advice from Watthead, the code section that you need to read would be 250.32(B)(2)

Also no matter if you run a separate EGC or not out to a detached building you must connect grounding electrodes to the panel grounding bar.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Re: 3 wire sub panel #40443
07/20/04 03:19 PM
07/20/04 03:19 PM
D
derater  Offline OP
Member
Joined: Mar 2002
Posts: 179
s'what I thought - many thanks


Featured:

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

 

Member Spotlight
dougwells
dougwells
kamloops BC Canada
Posts: 1,142
Joined: May 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 16
Potseal 15
Popular Topics(Views)
243,592 Are you busy
180,388 Re: Forum
170,861 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.019s Queries: 14 (0.004s) Memory: 0.9568 MB (Peak: 1.0884 MB) Zlib enabled. Server Time: 2018-01-22 14:13:17 UTC