Help with reverse polerity

Discussion in 'Motorhome Chat' started by sally47, Dec 22, 2015.

  1. sally47

    sally47 Funster

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    Off to France in March and thought I got all I needed vis jackets red triangles breathalisers acci books two pin adapter now I have read about reverse polarity anybody tell me what I need to do or get for this please
     
  2. John Laidler

    John Laidler Funster

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    Turn round on the pitch and reverse in, this cancels the effect.

    Alternatively, buy a gizmo to detect it and make up a short lead with crossed wires - so to speak.
     
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  3. Bertie Bassett

    Bertie Bassett Read Only Funster

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    You are a very bad man!:xrofl:
     
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  4. davidbaldam

    davidbaldam Funster

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    I made up a short lead with one end reversed but after saying that have only had to use it once. On the whole reversed polarity shouldn't be too much of a problem.
     
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  5. Bertie Bassett

    Bertie Bassett Read Only Funster

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    Same here. If I can do it sally47 anyone on earth can do it,
     
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  6. scotjimland

    scotjimland Funster Life Member

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  7. teensvan99

    teensvan99 Funster

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    You should make up a short reverse lead as some chargers do not like it and it has been known for them to burn out. Better to spend a £10 on a couple of bits than running around finding an electrician to fix it. Up to you.
     
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  8. scotjimland

    scotjimland Funster Life Member

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    and I thought this thread would die.. :pray:

    is this after gas was pumped in through the vents ? :xwink:

    popcorn_jon_stewart.gif
     
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  9. hilldweller

    hilldweller Funster Life Member

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    http://www.ebay.co.uk/itm/NEW-UK-Ma...602281?hash=item336c421569:g:Kz4AAOSwd0BVxHYc

    http://www.ebay.co.uk/itm/Europe-Co...486659?hash=item3a8f12f203:g:mPcAAOxy4XNSMsdj

    Maybe this pair instead of the the lead above....

    http://www.ebay.co.uk/itm/Polarity-...844963?hash=item1c5dbe6c63:g:XdsAAOSwKrhVbY5O

    Basically, hook up, put the tester in a socket and if it shows reverse polarity undo the hookup and put the reverser lead in line, the tester should now read OK.
     
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  10. JeanLuc

    JeanLuc Funster

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    You don't need breathalysers; you do need high-vis jackets, triangle and spare bulbs.
    I once made up a reverse-polarity link but never used it so I used the plug and socket for another lead. Now I never bother about reversed polarity, but if I do hook-up abroad, I generally put a tester in one of the van's 230V sockets to make sure there is a good earth. This is much more important than reversed polarity.
    Here is the kind of tester that I use - you can get them in lots of places: http://www.ebay.co.uk/itm/PLUG-IN-S...hash=item27d92b6b9b:m:m5byZ_PEXMO3lCgHbLb0cMg
     
  11. Jaws

    Jaws Funster Life Member

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    Would someone with more technical savvy that I have explain how reverse polarity can damage a charger please ?
     
  12. hilldweller

    hilldweller Funster Life Member

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    Have you been drinking from the PC bottle again ?

    Surely it was a subtle joke.
     
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  13. Gizmouk

    Gizmouk Funster

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    Short answer:
    Makes no difference at all.

    Enjoy your time in France :)
     
  14. Stealaway

    Stealaway Funster

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    Besides switching the live of before working on a device (I would always unplug it), I have been confused about the importance of reverse polarity.
    AC current spends it life switching between positive and negative - 50 times a second.
    I would be pleased if someone would explain it.
     
  15. eddievanbitz

    eddievanbitz Trader - Funster

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    Personally, I have never checked for reversed polarity in my life whilst away in my motorhome. I would use it regardless so see no point.
     
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  16. Mags52

    Mags52 Funster

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    Our reverse polarity light went on on one site in France. I ignored it because I've never had a van with a warning light before so decided that if it was ok when I didn't know about it it would still be ok. The van and us are still in one piece.
     
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  17. maxi77

    maxi77 Funster

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    Rather than reverse polarity in reality it is live and neutral reversed. As far as all the appliances are concerned they will work just fine. It is easily discovered using a test plug available from all sorts of sources from B&Q up. I get mine from CPC Farnell online for a few pounds. What is the problem when live and neutral are reversed, if you have single pole switches which is very common in the UK the switch acts on what it thinks is the live side thus removes power from the circuit beyond the switch. When live and neutral are reversed the circuit is broken but the neutral wire which should be at earth potential is in fact live. If there are no problems with the circuit and you don't poke inquisitive fingers inside little will happen but it can cause problems when things go wrong. How do you fix it, if you are connected via a continental 2 pin plug just take it out and rotate it through 180 degrees and put it back in again, for more conventional 3 pin plugs you do need a reversed lead. Many continental vans are protected by having twin pole switches that isolate both live and neutral
     
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  18. andy63

    andy63 Funster

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    Think I've mentioned it before but it won't hurt to do so again.
    I have a combitronic heating and hot water system in the van... It has the facility to use 240v to heat van and hot water...
    The control panel is the deluxe version (see photo).
    If the polarity is reversed the 240v won't work...
    The diesel side still works...
    The electronics in the panel must have to see the live on the correct pin...that's all I can think of...
    Anyway other systems may be similar so worth a mention..
    20151222_124322.jpg

    Ta Andy
     
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  19. XRN

    XRN Funster

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    Maxi77 is correct. Reverse polarity has no effect on the operation of "most" appliances however folks need to be aware that any work on 240v within the motorhome needs to be done with the mains lead disconnected. Sucking eggs I know but..relying on the inside breaker being in the Off position whilst still connected to the mains externally will kill you as the neutral side of the breaker, which would normally be dead when switched off, is still live when the polarity is reversed. Another pointer for us DIYers, reverse polarity makes the screw part of an Edison Screw light fitting live whilst the central prong is neutral. Therefore touching the screw part of the fitting whilst changing a bulb will give you a shock even though the switch is off.
     
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  20. Techno

    Techno Funster Life Member

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    One reason why the lighting is 12 volts not mains
     
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