ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
by gfretwell. 03/20/18 12:06 AM
Recall notice: Southwire wi-fi wall switches
by sparkyinak. 03/15/18 06:03 PM
Goodman Manufacturing Recalls Modular Blowers
by Admin. 03/13/18 10:40 PM
MAAX Spas Recalls Hot Tubs and Swim Spas
by Admin. 03/13/18 10:29 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 30 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
conductor inductance #165861
07/06/07 04:21 PM
07/06/07 04:21 PM
barbwire  Offline OP
Junior Member
Joined: May 2003
Posts: 17
O.K. next question, I have a 110/208 volt sw gear with 2 sections, feeding out to 6 closets are 2 sets of 400 amp feeders,paralleled, (fed underground), if I want to keep a good pattern in my riser bank I may have to utilize two conduits in different sections of gear, they come out of the ground about 4 ft apart, as long as I keep the conductors together out of each conduit does this comply with 300-20?

2017 / 2014 NEC & Related Books and Study Guides
Re: conductor inductance [Re: barbwire] #165887
07/07/07 02:11 AM
07/07/07 02:11 AM
gfretwell  Offline

Joined: Jul 2004
Posts: 9,185
You didn't say if these were metal raceways but if you keep the conductor sets grouped it really doesn't make any difference. Keep all the conductors from each circuit in one pipe. Where you have parallel sets, keep each set together (A/B/C/N in one pipe A/B/C/N from the parallel set in another pipe)
All of the "Goes Outtas" have to balance all of the "Goes Innas"

Greg Fretwell
Re: conductor inductance [Re: gfretwell] #165897
07/07/07 10:18 AM
07/07/07 10:18 AM
barbwire  Offline OP
Junior Member
Joined: May 2003
Posts: 17
Sorrry, raceways are PVC underground with a change over to rigid coming through the slab. Thanks for the reply, makes sense.


2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Posts: 22
Joined: August 2009
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 5
Admin 5
Popular Topics(Views)
244,415 Are you busy
181,531 Re: Forum
171,579 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.017s Queries: 15 (0.004s) Memory: 0.9505 MB (Peak: 1.0773 MB) Zlib enabled. Server Time: 2018-03-20 05:38:17 UTC