Quote:
Originally Posted by moandick
Hi Solitaire
In terms that I can understand - not being an electrician.....
You are already aware that some European sites use two pin plugs rather than three - the third pin being an earth lead.
Each English lead contains three wires - a live, a neutral and an earth - all of which must be located in their proper place in order to make the equipment work properly - and that is done by the shape of the plug - it will only fit into a socket in one particular way.
On a two pin site there is NO earth wire (just a live and a neutral) and that means that it is possible to fit the plug into the socket the 'wrong' way round - hence 'Reverse Polarity' - in theory it could mean that your appliances works backwards.
Seriously - it actually means that the appliance could still be live even when it is switched off.
Go to any caravan dealers where they have a spares shop and they will be able to supply a polarity tester and a specially wired cable which fits between your lead and the socket - and corrects the polarity to that which you need.
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I spend over two months each year travelling around France inspecting sites for a campsite guide and I have NEVER found a site with a two pin connection and hence no earth. can anyone name a site they have found with just a two pin, no earth connection. if so this site contravenes local and EU laws and should be shut down.
The standard French plug does have only two pins, one each for the live and neutral. However it does have a female socket to receive the earthing pin fitted to the socket. So though these plus look like a two pin connection they are a three pin connection.
The problem with reversed polarity is very common in France and on any particular campsite you may find some sockets are OK and others have reversed polarity. This is because the French do not worry about reversed polarity. What you need is a blue plug and blue socket connected with a short cable wired so that live on the plug is connected to neutral on the socket and visa-versa. You can then place this adapter between your motorhome and the normal hook-up lead correcting the reversed polarity.
In countries such as Germany they use the Schuko plug which again only has two pins for live and neutral but it also has two side terminals for the earth - again giving a three wire connection. If reversed polarity is experienced this plug can be taken out, turned 180 degrees and put back in thus correcting the polarity.
You should by a polarity checker from shops such as B&Q as they do give some idea of the state of the connection.
Finally you should never use the standard holiday-type travel adapter that fits onto our 3-pin plug for the following reasons.
1. They are usually only designed for low amperage
2. They are not intended for use out doors and are not waterproof
3. Many do not have an earth connection as they are intended for e4lectric razors, tooth brushes and battery chargers which nearly always only use a two wire connection.
4. Almost all reverse the polarity