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

ECN Shout Chat
Top Posters(30 Days)
Admin 17
Recent Posts
Old decora style outlets
by Admin. 03/25/17 11:40 AM
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
fuse rejectors
by HotLine1. 03/24/17 07:53 AM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,432 Are you busy
166,150 Re: Forum
160,606 Need opinion
Who's Online Now
0 registered members (), 80 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#90829 - 12/12/04 07:39 PM 2 ungrounded conductors / 1 means of protection  
rkidd  Offline
Junior Member
Joined: Dec 2004
Posts: 2
Atlanta, Ga. USA
I recently cited a double tap (two ungrounded conductors terminating on one 20A breaker) in a service panel as a code violation, but when challanged on it, I can not find it in either the 1999 or the 2002 NEC. I fell like an idiot. Can someone help me out here?


Ray

2017 / 2014 NEC & Related Books and Study Guides

#90830 - 12/12/04 07:44 PM Re: 2 ungrounded conductors / 1 means of protection  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
110.3(B) or last sentence of 110.14(A)


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#90831 - 12/12/04 09:14 PM Re: 2 ungrounded conductors / 1 means of protection  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
rkidd,

Before citing "double taps" be sure that the breaker is not designed for 2 terminations.
The double tap was commonly cited when I was doing real eatate work. However, some designs such as the "pressure plate" type of termination (Square D uses this) allow 2 conductors of the same size to be terminated on the breaker.


#90832 - 12/12/04 09:15 PM Re: 2 ungrounded conductors / 1 means of protection  
Electric Ian  Offline
Member
Joined: Feb 2004
Posts: 133
MA, USA
This is one of those things that a lot of people in the trade assume is always a code violation. Not necessarily. It is completly dependent on whether or not the circuit breaker is listed for one or two wire. Many 15 and 20Amp circuit breakers are in fact listed to accomodate 2 wires. Reference the link below from the web site of Mike Holt (who probably has more credability than me [Linked Image]
http://www.mikeholt.com/technical.php?id=nec/unformatted/Jan_ECM&type=u&title=NEC%20-%20Question/Answers%20(1-4-2K)


#90833 - 12/13/04 01:39 AM Re: 2 ungrounded conductors / 1 means of protection  
rkidd  Offline
Junior Member
Joined: Dec 2004
Posts: 2
Atlanta, Ga. USA
Thank you all for the speedy replys. With these three answers plus the ref. to the Mike Holt site, I get it. I was barking up the wrong tree thinking I would find something that would say only one branch circuit can be protected by one over current device. Thanks again. Ray


Ray


Member Spotlight
TOOL_5150
TOOL_5150
Bay Area
Posts: 61
Joined: August 2007
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: 0.014s Queries: 14 (0.003s) Memory: 0.7661 MB (Peak: 0.9037 MB) Zlib enabled. Server Time: 2017-03-25 17:26:31 UTC