ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Recent Posts
Where is Everyone?
by gfretwell - 06/20/21 10:53 PM
Happy Father's Day!
by Bill Addiss - 06/19/21 04:16 PM
A Risky Setup
by timmp - 06/18/21 08:08 PM
Conduit over Vinyl Siding
by Jim M - 06/16/21 08:30 PM
Updated Forum Software
by Admin - 06/15/21 10:23 AM
New in the Gallery:
2020 - 2021 Winter Project
2020 - 2021 Winter Project
by Bill Addiss, April 29
Garden 2021
Garden 2021
by Bill Addiss, April 26
Who's Online Now
1 members (Scott35), 13 guests, and 15 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Dec 2004
Posts: 2
rkidd Offline OP
Junior Member
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?

2017 / 2014 NEC & Related Books and Study Guides
Joined: Jan 2003
Posts: 4,391
110.3(B) or last sentence of 110.14(A)

Bob Badger
Construction & Maintenance Electrician
Joined: Mar 2001
Posts: 2,056

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.

Joined: Feb 2004
Posts: 133
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]

Joined: Dec 2004
Posts: 2
rkidd Offline OP
Junior Member
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


Link Copied to Clipboard

Tools for Electricians
Tools for Electricians

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
CA, Inland Empire
Posts: 43
Joined: September 2013
Top Posters(30 Days)
Admin 10
Trumpy 8
Popular Topics(Views)
280,460 Are you busy
213,547 Re: Forum
200,418 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5