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Old 02-09-2010, 02:51 AM   #16 (permalink)
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Originally Posted by NiHaoMike View Post
Isolation that is required by safety law will prevent that problem.
Except when it doesn't, my folks blew out a camera, printer pSU and a monitor by attaching them to opposing polarity lines from a 220 pigtail at a local country fair.

Anything that communicates isolated or not suffers ripple issues and micro currents when run on opposing polarities. very hard to get around that.
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