The only time I have have to worry about where things are pluged in at my auditorum is the fact that we have two different sets of plugs, (one white and one orange). The orange ones are dedicated computer plugs, and have a seperate (longer) ground rod then the other circut does. The only problem is, two ground rods usualy means that there is a small bit of current wanting to get from one rod to the other, and that can make a bit of hiss, so i just make sure all my sound equipment is pluged into one or the other. (there are horror stories floating arround the internet about guitar players who's amp is pluged into one circut and the mic system is on a differnt ground, and them getting zapped through the mouth singing into the mic. I kinda doubt that the difference in voltage/amperage is that much... but.... i dont really see how it can hurt to be safe.
PS for more info on this, look up "ground loop" or "ground loop hiss" or something similar on google
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[b]Peter[/b]
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