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

Topic Options
Rate This Topic
#84673 - 04/20/03 08:54 AM Multi-wire branch ckt
Steve T Offline
Registered: 02/14/01
Posts: 306
Loc: Oak Park, IL, USA
Does anyone know if there is a requirement for identifying multi-wire branch circuits in the panel. If not it seems to me there should be. It can be very difficult for the next electrician to properly modify breaker spaces if need be without knowing which neutral goes with which hots.
2017 / 2014 NEC & Related Books and Study Guides
#84674 - 04/20/03 12:03 PM Re: Multi-wire branch ckt
CTwireman Offline
Registered: 02/07/02
Posts: 840
Loc: Connecticut, USA
No requirement. That's just one of the challenges of being an electrician, I guess.
#84675 - 04/21/03 06:13 AM Re: Multi-wire branch ckt
ElectricAL Offline
Registered: 10/10/01
Posts: 597
Loc: Minneapolis, MN USA
I understand the concern. As a regular practice, on raceway systems, I group the neutral with its related phase legs and use a wire tie or, at minimum, tape to identify the group, close to the raceway entry to the panel (assuming more than one neutral is in the raceway). If I have to verify neutral - phase leg combinations on an existing panel as part of the changes I'm doing, again, I'll mark the multiwire group with wire tie, etc., so as not to have to duplicate my effort the next time.

Al Hildenbrand
#84676 - 04/26/03 05:29 PM Re: Multi-wire branch ckt
CRW Offline
Registered: 02/11/01
Posts: 159
Loc: Bethlehem, PA USA
I feel it's always a good idea to put a wire number marker on both the phase conductor and the associated neutral. If the neutral is shared, put both or 3 numbers on it. This is good practice especially for conduit systems, but also for cables (NM, MC) as well. You never know when you may have to move a wire around, and why not make it as easy as possible to identify it?

Member Spotlight
Member Since: 01/22/05
Posts: 5316
New in the Gallery:
SE cable question

2017 NEC and Related
2017 NEC
Now Available!

Shout Box

Who's Online
0 registered (), 49 Guests and 13 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
Scotto, Freecrowder, clee512, Jdscott2005, FAIZAN

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