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#27784 07/31/03 11:52 PM
Joined: Nov 2002
Posts: 558
G
Member
If I feed a 100a main lug panel with say a 40a dp breaker, do I have 40a total capacity? Or do I have 40a available on each leg for 120v loads?

#27785 08/01/03 12:40 AM
Joined: Jun 2001
Posts: 141
A
Member
Russell,

Look at it this way--

40A @ 240V = 9600 VA

and

9600 VA/120V = 80A

So, you've got 40A on each of the legs.

Cliff

#27786 08/01/03 12:45 AM
Joined: Aug 2002
Posts: 141
E
Member
If you touch each of the two little screw heads on the circuit breaker where the wires go with the test leads of a voltmeter and it says 208 or 240, you have 80 amps of 120 volt power available. That's assuming you have a neutral too. Of course.
(signed) Sorry. I forgot my name.

#27787 08/01/03 06:36 AM
Joined: Nov 2002
Posts: 558
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Thank you Cliff and Bob.


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