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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?


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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

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