ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
LED retrofit flickers
by rmiell. 01/18/19 08:49 PM
Israel
by Texas_Ranger. 01/14/19 07:12 AM
Free Code class in Maryland 1/16/2019
by Admin. 01/12/19 05:43 PM
Calling all Non-US members!! (Non-US only)
by RODALCO. 01/12/19 02:37 AM
sec cable code conflict
by jake2018. 01/11/19 07:36 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 14 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
3 phase total amps #127929
03/19/02 10:51 AM
03/19/02 10:51 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 02:38 PM
03/19/02 02:38 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 07:30 PM
03/19/02 07:30 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
noderaser
noderaser
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 4
Popular Topics(Views)
252,829 Are you busy
189,624 Re: Forum
179,288 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.021s Queries: 14 (0.004s) Memory: 0.9499 MB (Peak: 1.0753 MB) Zlib enabled. Server Time: 2019-01-23 11:37:02 UTC