Shared Neutral In Conduit Raceway - Electrical - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Display Modes
Old 04-01-2013, 04:26 PM   #1
ericmunyon12345's Avatar
Join Date: Feb 2013
Posts: 55
Rewards Points: 75

Shared neutral in conduit raceway

My last post made me think of this question just because I'm curious. How many "hot" conductors can share a neutral in conduit? At what point does the neutral need "upsized"?


ericmunyon12345 is offline   Reply With Quote
Old 04-01-2013, 04:50 PM   #2
Semi-Pro Electro-Geek
Join Date: Jul 2009
Location: Arizona, USA
Posts: 3,045
Rewards Points: 2,990

You can have as many hots sharing a neutral as there are differently-phased legs in the system. A split-phase system can have two hots per neutral. A 3-phase system can have 3. If you manage to find a 2-phase system somewhere, it could have 4. There is one service configuration that could allow 6 hots on one neutral, but I doubt it's ever been used in reality. It has nothing to do with whether the wires are in conduit or not. You can never upsize a neutral to allow it to be shared with multiple hots on the same phase. The only way you get to share a neutral between hot conductors is if the current in the hot conductors cancels instead of adding. Thus, no up-sizing.


I am a lawyer, but not your lawyer. And who cares anyways? We're here to talk construction. This is DIY advice, not legal advice.
mpoulton is offline   Reply With Quote
The Following User Says Thank You to mpoulton For This Useful Post:
ericmunyon12345 (04-01-2013)

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Common Neutral in Jct Box??? PastorKramer Electrical 5 11-20-2012 06:10 AM
Shared Neutral - Open??? danbell78 Electrical 4 10-30-2012 11:03 PM
What conduit should I use? mulltron Electrical 6 07-12-2011 01:34 AM
Warm and Noisy Electrical Conduit Intravartolo Electrical 4 07-26-2010 01:46 AM
GFCI feeing subpanel question scott2332 Electrical 45 02-28-2009 03:15 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1