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Rack grounding to prevent ground loops or other noise

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David Allred:
The rack for a permanent install will have a DBX Zone-pro, several music sources, and a wireless mic.  All on a rackmount power strip on a dedicated 20A circuit.
Also in the rack will 4) RMX2450 amps.  Each on it's own 20A circuit.

Should all chassis be grounded together though the rail?  If so, do I need to grind paint at strategic locations, run a tap through tapped holes to remove paint, etc?  Is there a better / alternate way?  Is it even needed?
I will be using the barrier strips for signal input.   Is the ground of each input attached to the chassis?  Can I / should I use that as the ground points by jumping from one unit to the other?  Can I assume that the wire could just be signal size (20-24 awg)?
At this point, earth ground is made though all units power cords, correct?

Thanks,
David

John Roberts {JR}:
Modern products properly designed do not need any additional consideration. Screw then in, plug them in, voila (sp?).

JR

Kevin Graf:
The Middle Atlantic paper has excellent coverage of rack power wiring.

Integrating Electronic Equipment and Power into Rack Enclosures
Optimized Power Distribution and Grounding for Audio, Video and Electronic Systems

http://www.middleatlantic.com/pdf/PowerPaper.pdf

Lyle Williams:

--- Quote from: John Roberts {JR} on November 20, 2013, 02:39:05 PM ---Modern products properly designed do not need any additional consideration. Screw then in, plug them in, voila (sp?).

JR

--- End quote ---

Agree++.

Gear will get grounded through power and by being bolted into racks (no need to scrape paint.)

Safety-ground wise if there is a metal power outlet strip I'd expect power ground to be tied to the rack there.  If you just have a plastic power outlet strip then the rack will get grounded indirectly via the equipment and rackmount ears; not perfect but very very common.)

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