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While replacing some discrete I/O modules I took the opportunity to neaten some of the incoming wiring to our control panel. I quickly learned that disconnecting the shield (from ground) of a 120vac twisted pair cable will deliver a potent shock. I was under the assumption that the twists in the cable would cancel out any inductance into the shield. I thought the shield should only carry minuscule noise and prevent static buildup.
However, the disconnected shield remains hot. Is this normal or is it an indication of a problem?
However, the disconnected shield remains hot. Is this normal or is it an indication of a problem?