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<blockquote data-quote="Mike Sokol" data-source="post: 64530" data-attributes="member: 1989">Re: While were still talking groundingIf the entire sound system can be powered from a single 20-amp power outlet, and you keep its ground separate from building steel, there&#039;s really no need for all the copper bus bars. As mentioned earlier the simplest single point grounded sound system should be pretty much immune to any ground noise. Sounds like somebody is trying to sell you a lot of copper.&nbsp; I do know that according to the NEC you can&#039;t disconnect your outlet grounds by breaking off the sound gear&#039;s ground pins and bond it to this external bus bar. And if you mount your gear directly in the rack without isolation washers you&#039;ll create yet another potential ground loop path. The big ground bus bar solution is typically a brute force method used in radio stations and such as you originally mentioned. And certainly it&#039;s possible for your sound system (if accidentally bonded to the neutral bus or building frame somehow) could contaminate the telcom technical ground system. &nbsp;I think this all sounds like a bad idea. A standard isolated ground power system and properly connected sound components shouldn&#039;t hum at all. Are they more worried about hum, or buz, or RF/Digital interference from the Telcom system? Anything else you can provide?</blockquote>

[QUOTE="Mike Sokol, post: 64530, member: 1989"] Re: While were still talking grounding If the entire sound system can be powered from a single 20-amp power outlet, and you keep its ground separate from building steel, there's really no need for all the copper bus bars. As mentioned earlier the simplest single point grounded sound system should be pretty much immune to any ground noise. Sounds like somebody is trying to sell you a lot of copper. I do know that according to the NEC you can't disconnect your outlet grounds by breaking off the sound gear's ground pins and bond it to this external bus bar. And if you mount your gear directly in the rack without isolation washers you'll create yet another potential ground loop path. The big ground bus bar solution is typically a brute force method used in radio stations and such as you originally mentioned. And certainly it's possible for your sound system (if accidentally bonded to the neutral bus or building frame somehow) could contaminate the telcom technical ground system. I think this all sounds like a bad idea. A standard isolated ground power system and properly connected sound components shouldn't hum at all. Are they more worried about hum, or buz, or RF/Digital interference from the Telcom system? Anything else you can provide? [/QUOTE]

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