Isolated Grounding and Clean Power for Audio and Stage Lighting

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kyleapec

kyleapec

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siloam springs arkansas
I am doing a church and I have a 200% Neutral XFMR feeding an IG Clean Power Panel for the sound and stage lighting. Most of the branches are to receptacles, as most of the equipment will be cord and plug. None of the receptacles are IG and I don't see the reason for an IG panel when all the receps it feeds are normal plugs. Typically I would try to talk to the engineer, but even the general can't get a hold of the man; and we have had issues like him putting a 3 piece 4000 amp gear in a 3x4 room. I just want to make sure that they get a good installation, and they can do whatever church recording stuff they do without any hiccups. They don't mind paying a change order, and if i told I thought they needed it they would probably go ahead with it; but I don't want to waste the customers money on something that is not needed. I have always thought IG's were for sensitive computer equipment and true differential readings to ground etc, not for audio. I tried find out what I could on my own and even learned a new word in my research "audiophile", I have now read of people using Hospital Grade Receps and all kinds of wild IG stuff for audio equipment. I am now more confused then when I began. I reached out to an old-timer that I really respect about it, and he said he didn't think they needed the IG's, and that he would have separated the stage lighting from the audio panel, but he could see the call for a clean power panel. I apologize for rambling on and I guess the gist of my question is

1. Do you think it is worth the customer paying to add IG receps, will the gain be so minimal that it is not worth it?
2. Should I try and take the Stage Lighting off the Clean Power Panel, maybe oversize some neutrals?
3. Is there anything you guys would suggest other than IG's, any suggested reading would be appreciated as well.

Thanks,
 
I see not reason for and lots of reasons against putting the stage lighting (power circuits) on the same panel as the audio. SCR/Triac dimming makes lots of HF/RF noise.
 
I could see the proper install of an IG circuit reducing the possibility of bringing unwanted noise in from the environment surrounding the circuits path to the equipment it powers. I think that is the point of the circuit, to not have what effects to a long antenna running all the way to the panel.
 
The best solution for audio sound is an isolated power system. google that and technical power systems and look at article 647.
IGs can help in audio power. Lots of information out there once you start looking.
 
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