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3 phase total amps #127929 03/19/02 11:51 AM
Joined: Aug 2001
Posts: 545
A
aldav53 Offline OP
Member
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 03:38 PM
Joined: Feb 2002
Posts: 182
B
Bob Offline
Member
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
Joined: Mar 2002
Posts: 582
R
Ron Offline
Member
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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