Go here: https://www.electrical-contractor.net/ubb/Forum7/HTML/000184.html

Firgured I'd link from the General Discussion Area because most of us (me included) tend to overlook the Theory Section and I figured that the thread belonged there.

Thanks!

-Virgil

[This message has been edited by sparky66wv (edited 09-05-2002).]

Tossed in some basic control terminology, FWIW.