Thanks Grant, very much appreciated indeed.
From: "Grant Richter" <grichter@asapnet.net>
Date: Tue, 21 Oct 2008 03:33:08 -0000
To: <wiardgroup@yahoogroups.com>
Subject: [wiardgroup] Re: Power supply question
> One last question - is the fact that the PS500's power inlet ground lug is NOT wired up a >
> concern for the 'built-in' star grounding the Wiard 300 modules employ? The way these
>PSU's ship there is no path to earth ground through them.
Underwriters Laboratory absolutely requires a hard earth ground to any surface that a person
may come in contact with. This is to blow the circuit protector safely if a hot wire comes in
contact with that surface. No one in their right mind will advise you to remove any earth
grounds. They would be opening themselves to huge legal liability and possible criminal
charges.
However, a recording studio built to this UL spec with all hard earth grounds will be unusable
because of ground loops and tremendous hum problems.
You have to read between the lines and figure it out for yourself. I can not advise you to take
any action the may increase your risk of electrocution.
I do know the use of localized isolation transformers will isolate the hot conductor from the
earth ground system. This may render the hard earth grounds unnecessary for electrocution
protection. You will have to check applicable codes with local building inspectors.