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Old 06-20-2015, 12:59 PM   #21
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Originally Posted by donhillphoto View Post
Luckily, I've not encountered damage... yet.
Polarity is irrelevant to appliances. Polarity is one of many strategies to protect human life. Reversed polarity does not damage any appliance.
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Old 06-20-2015, 01:21 PM   #22
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I put the 50 amp hard wire Progressive in ours we haven't encountered any problem yet but I'm sure it will find an issue one day along the camping trail.
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Old 06-20-2015, 04:08 PM   #23
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Polarity is irrelevant to appliances. Polarity is one of many strategies to protect human life. Reversed polarity does not damage any appliance.
This is inaccurate as some power switching is polarity oriented and can leave equipment powered potentially leading to overheated circuits and premature failure.
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Old 06-20-2015, 04:45 PM   #24
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This is inaccurate as some power switching is polarity oriented and can leave equipment powered potentially leading to overheated circuits and premature failure.
And breakers will not work properly if the hot (power) is coming in on the neutral. Neutral doesn't have breakers on it. Reversed polarity may not directly and instantly damage an appliance but it is trouble all the same.
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Old 06-21-2015, 09:47 AM   #25
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And breakers will not work properly if the hot (power) is coming in on the neutral. ... Reversed polarity may not directly and instantly damage an appliance but it is trouble all the same.
... for human safety reasons. Circuit breakers are also for human safety; not for appliance protection.

Reversed polarity to appliances looks just like normal polarity. When one wire is negative, the other is positive. And then polarity reverses - 120 times every second. Appliance only sees two wires constantly reversing polarity. Appliance only sees the voltage difference between two AC wires. Even AC line filters in electronics are (and must be) designed for normal or reversed polarity.

If reversed polarity causes overheating, then one can say what internal part overheads. And why.

Polarity is only another layer of protection ... for humans.
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Old 06-21-2015, 09:57 AM   #26
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... for human safety reasons. Circuit breakers are also for human safety; not for appliance protection.

Reversed polarity to appliances looks just like normal polarity. When one wire is negative, the other is positive. And then polarity reverses - 120 times every second. Appliance only sees two wires constantly reversing polarity. Appliance only sees the voltage difference between two AC wires. Even AC line filters in electronics are (and must be) designed for normal or reversed polarity.

If reversed polarity causes overheating, then one can say what internal part overheads. And why.

Polarity is only another layer of protection ... for humans.
From inspectapedia:

Some appliances and electronic devices may be damaged if polarity is reversed

Some appliances and some electronic equipment may be damaged if left connected to a reversed-polarity electrical circuit.

"We disassembled a coffee maker that had burned-up and found that the appliance had been damaged by being left connected to its receptacle with polarity reversed. The presence of live voltage at the "wrong end" of a circuit or circuit board may cause some devices on the board to remain energized even when the device has been "switched off". A result can be overheating or electrical shock hazards."
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Old 06-21-2015, 10:33 AM   #27
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From inspectapedia:
Some appliances and electronic devices may be damaged if polarity is reversed
Good. If a source is reputable, the it also said WHY. Without 'why', claims are routinely rejected as only speculation. Claims based only in observation are classic examples of junk science reasoning. Claims based only in obervation mostly come from those who do not even know how electricity works.

Any appliance damaged by reverse polarity is a major design defect. Would not get a UL listing. If someone who knows only from observation and does not also say why, well, that is how urban myths get separated from informed conclusions.

If reversed polarity causes any appliance damage, then also state why. Define the internal part damaged by reverse polarity. Otherwise it is only hearsay. If inspectapedia does not do that, then the source is best considered bogus. It must be true. I read it on the internet.

Example: AC line filter inside all electronics connects AC neutral to safety ground using same parts that also connect AC hot to safety ground. Why? Why would we use parts rated for over 200 volts on neutral to ground when that voltage should only be single digits? Because everything must be designed to operate without damage even on reversed polarity. As was true long before any of us even existed.

Polarity is another technique (another layer) for human safety. Reversed polarity must never harm any properly designed appliance. Other protection layers mean reverse polarity should not cause human injury.
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Old 06-26-2015, 07:57 PM   #28
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Good. If a source is reputable, the it also said WHY. Without 'why', claims are routinely rejected as only speculation. Claims based only in observation are classic examples of junk science reasoning. Claims based only in obervation mostly come from those who do not even know how electricity works.

Any appliance damaged by reverse polarity is a major design defect. Would not get a UL listing. If someone who knows only from observation and does not also say why, well, that is how urban myths get separated from informed conclusions.

If reversed polarity causes any appliance damage, then also state why. Define the internal part damaged by reverse polarity. Otherwise it is only hearsay. If inspectapedia does not do that, then the source is best considered bogus. It must be true. I read it on the internet.

Example: AC line filter inside all electronics connects AC neutral to safety ground using same parts that also connect AC hot to safety ground. Why? Why would we use parts rated for over 200 volts on neutral to ground when that voltage should only be single digits? Because everything must be designed to operate without damage even on reversed polarity. As was true long before any of us even existed.

Polarity is another technique (another layer) for human safety. Reversed polarity must never harm any properly designed appliance. Other protection layers mean reverse polarity should not cause human injury.

So you are saying this device is not needed and a regular surge protector with suffice.
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Old 06-26-2015, 08:21 PM   #29
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I have close to zero knowledge of that which you all speak ....but I have a question please....


If we get one of the surge protectors & if we leave our camper for a bit & if the surge protector is tripped.... will the electric come right back on but the surge protector record an 'event' to let us know there is an issue? I ask because AC is left on for the pup when we take bike rides, go swimming, visit local microbreweries .... and I don't need to come home to a cooked dog (although both vents are always open with vent covers for air flow)
Thanx
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Old 06-26-2015, 09:31 PM   #30
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I have close to zero knowledge of that which you all speak ....but I have a question please....


If we get one of the surge protectors & if we leave our camper for a bit & if the surge protector is tripped.... will the electric come right back on but the surge protector record an 'event' to let us know there is an issue? I ask because AC is left on for the pup when we take bike rides, go swimming, visit local microbreweries .... and I don't need to come home to a cooked dog (although both vents are always open with vent covers for air flow)
Thanx
Our EMS will only drop the power for as long as it senses a problem. It will connect when the power returns to normal limits. Ours does not indicate or record an incident. The microwave clock does that.
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