The Electrical Contractor Network

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

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Calling all Non-US members!! (Non-US only)
by aussie240
12/07/16 02:39 AM
Photo Upload Tutorial
by DanK
12/06/16 11:35 PM
Sprinklered equipment 26-008
by bigpapa
12/02/16 04:24 PM
On Delay Relay with Auto Reset
by Potseal
12/01/16 09:59 AM
Wow, that was close!
by jraef
11/28/16 07:06 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 13
HotLine1 9
Texas_Ranger 8
sparkyinak 7
Trumpy 6
Who's Online
1 registered (ampherder), 184 Guests and 5 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#185327 - 03/10/09 06:34 PM Calculating resistance due to CEMF
sparkyinak Offline
Member

Registered: 07/08/07
Posts: 1295
Loc: 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

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#185407 - 03/13/09 11:18 AM Re: Calculating resistance due to CEMF [Re: sparkyinak]
SteveFehr Offline
Member

Registered: 03/19/05
Posts: 1192
Loc: 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!"

Top



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