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Earth pin missing

lyledunn
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I noted several of these connecting audio visual equipment below a control desk in a large church complex. You can see that the earth pin has been deliberately removed. Must have been done before the date on the PAT stickers! Anyway, I know some of these audio guys have strange perceptions and I am wondering was the earth pin removed to avoid interference.
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    Probably done in a misguided attempt to remove "hum" aka an earth loop.


    However, removing the mains earth is NEVER the correct way out of this problem. 


    The correct way is:


        a). Use equipment which uses a 'balanced line' for the interconnections or


       b). Use audio isolation transformers to break the loop.


    Whoever did this is either an amateur who does not understand what he is doing, or, if doing it for a living, is clearly NOT a professional!


    I've had to solve this & similar issues in a live & time pressured environment - this is not the way to sort this issue, even in an "oh ***" moment


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    Probably done in a misguided attempt to remove "hum" aka an earth loop.


    However, removing the mains earth is NEVER the correct way out of this problem. 


    The correct way is:


        a). Use equipment which uses a 'balanced line' for the interconnections or


       b). Use audio isolation transformers to break the loop.


    Whoever did this is either an amateur who does not understand what he is doing, or, if doing it for a living, is clearly NOT a professional!


    I've had to solve this & similar issues in a live & time pressured environment - this is not the way to sort this issue, even in an "oh ***" moment


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