ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 255 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Jul 2001
Posts: 5
B
Barry Offline OP
Junior Member
Let's say I have a 3 ph panel and a store with general lighting and plugs.Then add lighting throughout the space on circuits 1,3,2,4,and 12. Is there anything wrong with pulling homeruns of 1,3,12,n and 2,4,12,n?I can't see any reason it would violate any code but would it present any kind of safety issues?I had a situation like this were the common circuit was everywhere in the store and rather than pull a dedicated neutral to every location I thought I could add it to existing groups.My boss couldn't find fault with the reasoning but said no one ever does this . What am I overlooking?
I read this forum several times a week and even though much of the time I'm confused by the issues I am learning a little at a time. Thanks to everyone. Barry

Joined: May 2001
Posts: 176
W
Member
It appears you are pulling two homeruns to ckt 12. Is this correct?
Three phases with one neutral is common practice. The neutral only carries the unbalanced current. However, I would not pull ckt 12 in both homeruns on the same neutral.
If the lighting is electronic ballast fluorescents, then we specify a neutral for each circuit due to harmonic currents generated by the switching characteristics of the electronics in the ballast. Our Moderator may have explained harmonics in the technical section. If not, I'm sure he will give us a good explanation.

Joined: Nov 2000
Posts: 2,148
R
Member
Barry,
I see no problem with installing the circuits in that way.
Don(resqcapt19)


Don(resqcapt19)

Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5