ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Photocell
by twh. 01/22/18 05:06 PM
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 26 guests, and 9 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Calculating resistance due to CEMF #185327
03/10/09 08:34 PM
03/10/09 08:34 PM
S
sparkyinak  Offline OP
Member
Joined: Jul 2007
Posts: 1,328
Alaska
Here is a odd one. Can anyone know a way to calculate the resitance or impedence (for the politically correct) of an AC circuit that that is unbalanced which will result in resistinace due to CEMF? Thanx


"Live Awesome!" - Kevin Carosa
Work Gear for Electricians and the Trades
Re: Calculating resistance due to CEMF [Re: sparkyinak] #185407
03/13/09 01:18 PM
03/13/09 01:18 PM
S
SteveFehr  Offline
Member
Joined: Mar 2005
Posts: 1,213
Chesapeake, VA
CEMF in a ordinary stationary piece of wire is simple straight-line inductance. NEC has tables in the back for most cables already. It gets more complex if you're talking about motors and other moving magnetic fields.

And yeah, this is certainly the right time to call it "impedance!"


Featured:

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

 

Member Spotlight
NickD
NickD
Amish Country, PA
Posts: 46
Joined: March 2013
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 15
Potseal 15
Popular Topics(Views)
243,595 Are you busy
180,393 Re: Forum
170,863 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.015s Queries: 15 (0.004s) Memory: 0.9408 MB (Peak: 1.0551 MB) Zlib enabled. Server Time: 2018-01-22 23:51:10 UTC