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Apr 9, 2018 at 18:21 history edited τεκ CC BY-SA 3.0
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Apr 9, 2018 at 18:14 comment added τεκ The shield carries the return current. If one or both ends has a transformer it need not be at ground.
Apr 9, 2018 at 18:09 comment added FourierFlux So the shield is also used as a ground?
Apr 9, 2018 at 18:06 history answered τεκ CC BY-SA 3.0