Jim Kelley wrote:
Cecil Moore wrote:
If the cos(phase_angle) is positive, convention has it
flowing toward the load. If the cos(phase_angle) is negative convention
has it flowing toward the source.

Prove it.

Huh? You're kidding, right? Plug a 100k resistor into your wall socket.
Assuming the "hot" wire is the one on the left, like it is in my
house, and that hot wire is the reference: When the resistor lead
plugged into the hot side is a positive voltage compared to the other
side, the current is flowing out of the hot wire into the resistor, by
convention. When the resistor lead plugged into the hot side is a negative
voltage, the current is flowing into the hot wire. Shirley, this is common
knowledge for a physics prof. It is certainly common knowledge for power
engineers.
--
73, Cecil http://www.qsl.net/w5dxp



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