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Old 11-18-2007, 06:38 PM   #1
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Default reversed polarity

today i was changing a single gang duplex recept to a two gang quad. upon inspection of the opened box i discovered the polarity was reversed. i started checking other boxes and the problem was the same in about 80 percent of them. i am correcting all of them but my question is could that have done any damage to my electronics such as tv or stereo. any comments are appreciated.
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Old 11-18-2007, 08:39 PM   #2
 
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but my question is could that have done any damage to my electronics such as tv or stereo. any comments are appreciated.
Does any of your equipment not work? That would be the easiest way to answer your question.

If Edison had his way, then yes, your equipment would be dead. But Tesla won, so you should be fine. One of the many fine electricians here I'm sure would correct me if I were wrong.
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Old 11-18-2007, 09:03 PM   #3
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Most of the time, reverese polarity won't damage anything.

The biggest problem is the shock hazard when you are using a light. If the screw shell of the lamp socket is the hot, you could get shocked just changing a bulb.
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Old 11-18-2007, 09:04 PM   #4
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There should be no long term equipment operational concerns, there could have been some safety issues.
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Old 11-18-2007, 09:49 PM   #5
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Its all about the safety issue the items are designed to fail to the neutral so if the items fails than you could have some issues..so polarity is really safety issue like on light sockets..the neutral is supposed to be the threads and the nipple in the center is the hot..so you don't get shocked when your fingers touch the threads while changing the light bulb hot in you bare feet on that metal step stool..
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Old 11-18-2007, 09:53 PM   #6
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..so you don't get shocked when your fingers touch the threads while changing the light bulb hot in you bare feet on that metal step stool..
Or a properly grounded luminaire.
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Old 11-20-2007, 11:04 PM   #7
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As a child i remember, in Russia we have 220v voltage in residential lighting and receptacles and applience plugs are designed to be plugged both directions. And I thought in the US it was not that long ago when small slot hot and big slot neutral receptacles became a standart. Switching H to N would not affect the household equipment and appliences, however as mentinioned above it bears a danger when using screwshell lamps.
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Old 11-06-2015, 12:01 AM   #8
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today i was changing a single gang duplex recept to a two gang quad. upon inspection of the opened box i discovered the polarity was reversed. i started checking other boxes and the problem was the same in about 80 percent of them. i am correcting all of them but my question is could that have done any damage to my electronics such as tv or stereo. any comments are appreciated.
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Old 11-06-2015, 12:34 AM   #9
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Old 11-06-2015, 12:37 AM   #10
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As a child i remember, in Russia we have 220v voltage in residential lighting and receptacles and applience plugs are designed to be plugged both directions. And I thought in the US it was not that long ago when small slot hot and big slot neutral receptacles became a standart. Switching H to N would not affect the household equipment and appliences, however as mentinioned above it bears a danger when using screwshell lamps.

Thats because Russia uses Schuko plugs which were invented in Germany around the time 127/220Y volt power existed and the country was moving toward 220 volts for utilization equipment. Thus polarization was not important at the time. Interestingly despite times changing schuko plugs continue to have no polarization to this day, with the exception being French plugs which have a protruding earth pin to keep the plug from being reversed.
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