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In Reply to: RE: Ground Filter-Issue is posted by fmak on August 21, 2011 at 08:47:09
It's rated 30A RMS. A typical house outlet is only 15A or 20A so it should handle everything connected to that particular outlet. I didn't know what you meant by a PC. It looks like its a low pass filter. Safety ground can act like a noise antenna so this could help a lot. I lifted my safety grounds a few years ago with great improvement in sound. My bi-amp setup plus a PS Audio P-300 creates ground loops.
ET
Follow Ups:
Can i ask you how do you lift the ground? Using balanceed transformer?
Also since the safety ground of the whole house is connected, if you lifted the ground in one area, would the ground for the whole house be lifted as well?
You can lift it just be using a resistor. Some instruments like thd analysers have a 10 Ohm ground lift when very low thd figures are being measured.
Exactly! This is the proper way to deal with grounding issues. You elevate chassis ground from earth ground but you still have the safety of grounded equipment. Obviously you need a resistor capable of handling sufficient current to ensure safety, 10W should be fine.
I must say this is against code and not recommended. Lifting ground just means not connecting the safety ground from a piece of equipment to the 3rd round prong on the U.S. AC outlet. Nothing is required except disconnecting that (green) wire at some point between the wall outlet and inside the piece of gear. Thus it has no affect on house wiring at all. Some Bryston amps have a ground lift switch. I also have a link below to a PS Audio power cord that has a "removable ground pin" - you must click on features and benefits to see that listed.
ET
Indeed,:"Some Bryston amps have a ground lift switch." But the engineers at Bryston are competent, so they'd never, ever lift a safety ground, needlessly endangering their customer's lives, and justifiably leaving themselves legally liable for such foolishness.
The ground lift switch on the Brystons neither lift or stand off the connection between safety ground from the chassis, rather it provides the ability to lift or stand off the signal/power supply ground from the safety ground, something fully acceptable to safe practice.
As long as folks advocate running AV systems from multiple mains circuits, and no one appears to know the difference between safety and signal grounds, folks will have ground loops and noise.
a major issue for 230V areas. Modern installations have residual ground current cutouts which do not do any favours for audio systems.
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