EHU Patch Lead for Reverse Polarity in France etc (1 Viewer)

Feb 21, 2022
416
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87,003
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Autosleeper Cotswold
I read on a post on here that some sites in France can be negative polarity and that it's necessary to have a 'patch lead' to correct it.

Where can I buy one of these please?
 

Two on Tour

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Sep 16, 2016
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Near the junction of the A14 and A1, Cambs
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I read on a post on here that some sites in France can be negative polarity and that it's necessary to have a 'patch lead' to correct it.

Where can I buy one of these please?

Made my own negative polarity patch lead up and you can get a socket tester which will show you if the polarity is correct or reversed from Screwfix.

 

Two on Tour

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Don’t bother personally. Just don’t play with the electrics whilst plugged in, and then you will be perfectly safe.

Some panels will not allow the 240 EHU to be used if the polarity is reversed and you have no choice but to use a reverse polarity patch lead to get mains 240 into the van.
 

MisterB

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Feb 25, 2018
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enough to know i shouldnt touch things i know nothing about ....
When
I read on a post on here that some sites in France can be negative polarity and that it's necessary to have a 'patch lead' to correct it.

Where can I buy one of these please?
You may also have read that lots of us don't worry about it and for very good reasons. Just do not start taking things apart when they're plugged in, but no sensible person would do that anyway ..

Do a bit more research on the forum (and then open up a few more cans of worms ... :LOL: :LOL:)
 

MisterB

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enough to know i shouldnt touch things i know nothing about ....
Some panels will not allow the 240 EHU to be used if the polarity is reversed and you have no choice but to use a reverse polarity patch lead to get mains 240 into the van.
Name names ...... !! Lol
 

Two on Tour

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Name names ...... !! Lol

For a start off the PMS control panel we had in our PVC would not allow reversed polarity mains to operate in our van. (y)

1680341259747.png

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tonka

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Jul 2, 2008
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If you want one, easy enough at camping places and on ebay etc..
Its just a plug and socket with the wires crossed.
In 20 years I have never bothered, although i do have one "somewhere"..

 
Aug 26, 2008
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I carry one of those mains tester gadgets. I made up my own short reverse polarity lead. I only used that lead on one occasion abroad. If you need a 2-pin plug for some older foreign hook-ups you simply turn that plug upside down, as Speve said.
 

ctc

Oct 12, 2015
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If you want one, easy enough at camping places and on ebay etc..
Its just a plug and socket with the wires crossed.
In 20 years I have never bothered, although i do have one "somewhere"..

It's in your "come in handy" box.

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Jun 29, 2015
3,509
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caravan (for now)
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I used to worry about reverse polarity, but most vans now have double pole mcb's so it's nowhere near as important as it used to be. I do have a lead that I made up years ago but I've never used it.
 
Feb 22, 2016
3,639
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I used to worry about reverse polarity, but most vans now have double pole mcb's so it's nowhere near as important as it used to be. I do have a lead that I made up years ago but I've never used it.
what he said.
 
Feb 18, 2017
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Hymer MLT 570
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We had a VW camper that would not work on reverse polarity, but not come across the problem in the last couple of decades, so guess more modern vans don't care.
 
Jun 29, 2015
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We had a VW camper that would not work on reverse polarity, but not come across the problem in the last couple of decades, so guess more modern vans don't care.
Very little electrical stuff would have a problem with reverse polarity, even electronic stuff. It's a problem for gas boilers in houses, that have flame rectification to detect the flame, but not in a MOHO as all the equipment is 12 volts

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Apr 27, 2016
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I have an adapter from round blue plug to 13A socket. Also a socket tester. Using these I can test the hookup socket, hookup cable and motorhome sockets for any faults including reversed polarity and missing earth. They have come in handy for helping out other motorhomers with for example faulty hookup cables etc.
BlueTo13AUKAdaptor.jpg13ampsockettester.jpeg
I'm not sure you can buy a reverse polarity adapter. I made one with a round blue plug and socket, with the live and neutral reversed. I always check the supply with a socket tester, usually in a motorhome socket. If the polarity is wrong I plug in the adapter. Reverse polarity is a safety issue with British MHs, but it's not the life-threatening problem it once was now that we all have RCD devices and doublepole circuit breakers fitted.

As Speve says, some European round '2-pin' plugs are reversible anyway, if you're on a site that uses those. German and Spanish ones are reversible, but French ones aren't.
 
Last edited:
Mar 11, 2013
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Like others I made my own. I'm not sure how legal what is basically an incorrectly wired plug or socket would be to sell. I should think it would need to be marked to make it obvious to the user.
 

Suenliam

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Oct 14, 2013
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When we first Mh'ed in France I didn't know about revered polarity so didn't worry about it. Then I joined a forum and got worried. Then I forgot about so didn't get a conversion adaptor. Now only worry when I read these posts :giggler: Never had a problem but then I don't mess about with lecky 'cos I don't understand it.
Sue

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Jun 29, 2015
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When we first Mh'ed in France I didn't know about revered polarity so didn't worry about it. Then I joined a forum and got worried. Then I forgot about so didn't get a conversion adaptor. Now only worry when I read these posts :giggler: Never had a problem but then I don't mess about with lecky 'cos I don't understand it.
Sue
No need to think about it unless you have a very old MOHO
 

Suenliam

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Oct 14, 2013
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Thanks - got a new one so I'll forget about worrying. I'll still not get involved with any lecky workings though!
Sue
 
Jun 29, 2015
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Don't forget to fit double pole fuses in those 13A plugs :giggle:


Naughy
 
Last edited:
Mar 23, 2012
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I would wager a fair bit of money that of you asked a hundred French motorhome owners there wouldn't be a single one with a reversed polarity lead.

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