Quick & Basic Electricity - Carol Fey
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A Contractor’s Easy Guide to HVAC Circuits, Controls and Wiring Diagrams How thinking about switches is like thinking about fishing (we have poles, we have throws...). Also, why the water analogy doesn’t work if you’re a plumber, how a thermostat is just a switch, how a relay is a translator, why a strip of lights isn’t wired in series or how to use a meter.