As astx asked for a new thread to discuss the following, i've started this one, following on from Post # 311
http://www.diyaudio.com/forums/solid...400w4r-21.html
Yes & no ! If ALL equipment is Ground/Earth wired as described in my following "Thesis" ;) there would be no need for GL's.
And i submit it "could" be in audio too. I'm not aware of ANY investigations/tests etc that have been conducted into this area ?
Could you provide a link ?
As requested, see my screenie
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True ground Only exists @ the Source ! This is where the signal/s originate.
My observations based on Actual sound system installations, & with regard to grounding each & every piece of equipments metal case Directly to earth via the Mains plug. Plus ONLY grounding @ the source, or the first available point nearest to it/them, ie the PreAmp/Mixer. And engaging All ground lift/s provided, except the source.
If the shield is connected to the chassis at both ends, it WILL create an earth loop = Not good !
Some equipment with a metal case has NO mains Earth connection, & is supplied with a 2 wire mains lead. If possible, it's beneficial to change it to 3 wire lead & earth the case, & then ALSO remove Any/All internal ground connection/s to the case.
In metal rack mounted Pro equipment, unless isolating grommets are used under the screws, an earth loop WILL be created = Not good ! Most "Pro" installs i've seen over the years, are incorrectly grounded, in more ways than one !
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I found an article on here which people might like to peruse etc. It incorporates some of my thoughts & findings.
http://www.diyaudio.com/forums/solid...400w4r-21.html
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Originally Posted by kgrlee in Post # 311 I take it you really mean 'Ground lift devices should be fitted to ALL items.' |
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Actually this is of great concern in Medical applications. |
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I think there is at least one EN (IEC standard) laying down the 'law' on this. |
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Zero, please post a pic of how you would earth your own amp. |
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True ground Only exists @ the Source ! This is where the signal/s originate.
My observations based on Actual sound system installations, & with regard to grounding each & every piece of equipments metal case Directly to earth via the Mains plug. Plus ONLY grounding @ the source, or the first available point nearest to it/them, ie the PreAmp/Mixer. And engaging All ground lift/s provided, except the source.
If the shield is connected to the chassis at both ends, it WILL create an earth loop = Not good !
Some equipment with a metal case has NO mains Earth connection, & is supplied with a 2 wire mains lead. If possible, it's beneficial to change it to 3 wire lead & earth the case, & then ALSO remove Any/All internal ground connection/s to the case.
In metal rack mounted Pro equipment, unless isolating grommets are used under the screws, an earth loop WILL be created = Not good ! Most "Pro" installs i've seen over the years, are incorrectly grounded, in more ways than one !
*
I found an article on here which people might like to peruse etc. It incorporates some of my thoughts & findings.
Quote:
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Audio Component Grounding and Interconnection http://www.diyaudio.com/forums/diyau...onnection.html |