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Originally Posted by moderately_clueless
So I work with all this stuff pretty often, but I'm still having trouble getting my mind wrapped around it all, so here's a few questions.
I'm still having trouble relating volts, watts and amps to regular theatre/sound use. I know that most household circuits have a 15/20 amp load and that they have a certain voltage limit. 110? 220? I don't remember. But I don't quite get what all that means. Particularly amps, I keep hearing them used, but I have yet to get a good explanation.
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I like the analogy of the water pipe. The voltage is like the water pressure. The amperage (current) is how much water is actually in the pipe. The wattage (power) is how much water is actually being pulled through the pipe.
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Also, I know that on a three phase power system (ie a generator), if it's not properly grounded you get that hum on the sound system.
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It doesn't have to be three phase. This can happen in any electrical situation. Think of it like this. You have two runners running a one hundred meter race. One runner starts at the beginning and the other runner starts at the fifty meter line. Which runner is going to reach the finish line first? The one with the shortest distance to run.