ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Welded Copper Connections
by gfretwell. 04/19/19 04:46 PM
Norwegian power?
by dsk. 04/19/19 10:29 AM
Israel
by annemarie1. 04/18/19 02:35 PM
Water heater calculationsSo when I count calculati
by watersparkfalls. 04/13/19 12:43 PM
Health Canada Electric Construction heaters recall
by dougwells. 04/12/19 01:22 AM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 7 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
3 phase total amps #127929
03/19/02 11:51 AM
03/19/02 11:51 AM
A
aldav53  Offline OP
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
When measuring 3phase feeders with an amp clamp on a 100a panel, I believe each phase is good to 100 amps, but we do not add all 3 phases to have a total of 300 amps, correct?


The Golden Rule - "The man with the gold makes the rule"
Tools for Electricians:
Re: 3 phase total amps #127930
03/19/02 03:38 PM
03/19/02 03:38 PM
B
Bob  Offline
Member
Joined: Feb 2002
Posts: 182
Mobile, AL, USA
You are correct. The panel is rated 100 amp
3 phase. Each phase is limited by the breaker and the conductor rating. As an example you might measure A = 50a B = 60a
and C = 50a. You do not add the total and
get 110 amps.

Re: 3 phase total amps #127931
03/19/02 08:30 PM
03/19/02 08:30 PM
R
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
White Plains, NY
If you were to measure 80 amps per phase, it would be 80 ampere, 3 phase on a 100 ampere panel. And, the utility will charge you for the equivelent of 80 amperes, 3 phase which is more than 80 amperes 1 phase.


Ron

Featured:

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

 

Member Spotlight
mersadrad
mersadrad
Montreal, Quebec, Canada
Posts: 28
Joined: March 2011
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
254,472 Are you busy
190,717 Re: Forum
180,431 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.015s Queries: 14 (0.004s) Memory: 0.9503 MB (Peak: 1.0758 MB) Zlib enabled. Server Time: 2019-04-20 10:30:53 UTC