Does reverse polarity damage applicances? (1 Viewer)

jacken

Free Member
Dec 9, 2007
190
2
kent
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992
MH
c class
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8 years
Having read all the good advice here on the subject, could some-one confirm or other-wise, if the above will kill my fridge, boiler or circuit boards etc. I have a left hooker and my wiring is all continental.

many thanks.

ken
 

scotjimland

Free Member
Jul 25, 2007
0
8
.
Funster No
15
MH
.
Exp
.
Hi Ken

I presume you are talking about the electric hook up ?

Reverse polarity won't damage any appliance or components.
 
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Braunston

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May 21, 2008
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Hi,

It could however undermine any thermal protection that you have on those appliances so be careful

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S

stagman

Deleted User
Having read all the good advice here on the subject, could some-one confirm or other-wise, if the above will kill my fridge, boiler or circuit boards etc. I have a left hooker and my wiring is all continental.

many thanks.

ken

Mains 240v a.c. no damage will be done if you reverse polarity,the danger is that when you switch something off you will switch the neutral and not the live,also some boilers won't work as they have reverse polarity protection .But beware if you reverse any d.c. circuits as this will blow the components and cause irreperable damage.
 
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jacken

Free Member
Dec 9, 2007
190
2
kent
Funster No
992
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c class
Exp
8 years
Thanks for the replies. The reason I asked was in Spain I hooked up without checking with my reverse polarity tester (a blond moment) and after that my fridge was acting up switching to gas whilst on hook up. It seems okay now and wondered if it had damaged any-thing.

Cheers again.

ken

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scotjimland

Free Member
Jul 25, 2007
0
8
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Funster No
15
MH
.
Exp
.
Thanks for the replies. The reason I asked was in Spain I hooked up without checking with my reverse polarity tester (a blond moment) and after that my fridge was acting up switching to gas whilst on hook up. It seems okay now and wondered if it had damaged any-thing.

Cheers again.
lly due
ken

Hi Ken..

I've had this happen too, especially on aires, it's normally due to low voltage or a dip in the voltage when there is a peak load.. , for example, when everyone switches on the kettle for breakfast... won't do any damage, just annoying..
 

hogan

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Aug 4, 2007
204
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Valencia,Spain
Funster No
59
MH
A class
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4
I guess it's always best to carry a mains polarity tester then to be on the safe side.:thumb:

I have a hymer with continental plugs,i cannot understand why people worry about reverse polarity.All the plugs can plug into the socket anyway around,this applies in my house also.
So if the polarity is correct going into a socket what are the chances of it being correct going into the appliance ?-

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American Dream

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Aug 20, 2007
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157
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125
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?
It doesn't........

Most stuff nowadays is double insulated (Plastic cased) anyway.

As long as the earth is attached to the chassis of the appliance if it's 3-core cabled and of metal construction.

Fridge/freezer/microwave/some kettles etc....
 

Jaws

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Sep 26, 2008
23,332
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There's a clue in the type of voltage we are talking about here :Smile:
A C

ALTERNATING CURRENT

Basically in one full cycle the +ve becomes -ve and visa versa ( effectively )
So no damage done .. But as Stagman said, you could be switching the feed and not the return
 

dave newell

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Oct 31, 2008
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I have seen at least one motorhome where the Truma combi heater would knock the site trip off if reverse polarity was encountered. I have no explanation for the reason why but I can verify it did it 'cos I tested it. I have also heard from others that some electronic battery chargers do not liek reversed polarity and can be damaged, again I have no explanation for it.

D.
 

vaughan

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Oct 30, 2008
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Thanks for the replies. The reason I asked was in Spain I hooked up without checking with my reverse polarity tester (a blond moment) and after that my fridge was acting up switching to gas whilst on hook up. It seems okay now and wondered if it had damaged any-thing.

Cheers again.

ken

The voltage in spain, especially in winter, is notoriously unreliable. I know MHomers who have used up nearly all their UK gas cylinders when their modern fridges auto switch over to gas when the voltage drops. Best to set your energy supply to the fridge manually.
Vaughan
 

Phil

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Oct 21, 2007
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10 years
If I inadvertently connected to a reverse polarity supply it would trip my on board battery charger.

I always check now and use a 1 metre long cable with one end having live and neutral reversed, ( clearly marked 'Reverse Polarity' ), in between my hook up cable and the van inlet and have had no more problems.

I use a Maplin Socket Tester to check the supply each time I connect up.

It should be noted that, especially in France, it is quite common to find 'correct' and 'incorrect' outputs from the same distribution point.

Phil.

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Sep 23, 2007
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Anyome have an idea why when I use my generator, the reverse polarity light on the sargent controler comes on. And is still on when i use my reverse polarity cable.
 

scotjimland

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Jul 25, 2007
0
8
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Funster No
15
MH
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Exp
.
Anyome have an idea why when I use my generator, the reverse polarity light on the sargent controler comes on. And is still on when i use my reverse polarity cable.

I may be wrong, but I believe it's because the genny isn't earthed to the motorhome.. or indeed earth, if an earth is run to ground at the genny it should prevent this happening..
 
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Jim

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Jul 19, 2007
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On a trip to Spain this year most of the sites that we stopped on had reversed polarity, I do have a plug in my kit with the wires reversed for such events, but most of the time I just turn the plug upside down and reconnect it, this works a treat.

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Pikey Pete

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May 25, 2008
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On a trip to Spain this year most of the sites that we stopped on had reversed polarity, I do have a plug in my kit with the wires reversed for such events, but most of the time I just turn the plug upside down and reconnect it, this works a treat.

Just a word of caution when you turn the plug upside down, as from time to time you may come across the system where the Earth is carried through a spring loaded third pin, so plugging in upside down will result in no Earth contact.

Pete
 
S

stagman

Deleted User
I have seen at least one motorhome where the Truma combi heater would knock the site trip off if reverse polarity was encountered. I have no explanation for the reason why but I can verify it did it 'cos I tested it. I have also heard from others that some electronic battery chargers do not liek reversed polarity and can be damaged, again I have no explanation for it.

D.

That is the danger of reverse polarity.Was it the main Rcd that was tripping if so it could be that a lot of the PCBs are terminated at the same potential as the neutral or earth.Difficult to explain properly but what happens is your live is picked up as an earth fault.In your home if you are supplied by what they call a PME system ,take a look at the incoming cable by your meter and you may find your earth is connected to your neutral,please note not on all systems some have earth rods.
 

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