Your mains hook up lead is probably 1.5mm 3 core. This is rated at 16amp, something you will not be drawing more than. No use going any heavier.

Colin

Hi Steve.

It's a short length of "hook up" cable with either the male or female plug wired up the wrong way around. Then, if the EHU post at the campsite has been wired up with the polarity the wrong way around, you can add this short length of cable, in line, with your existing hook up cable, to correct the problem.

How do you know the polarity is wrong? We have a red light on our extension cable that we run from our EHU cable into our awning but other than that, I don't know. I always thought Eribas were dual polarity?

Randa

Steve,
I was lead to believe that in normal circumstances reverse polarity is not an issue you need to worry about. In fact our friends on mainland Europe wonder why we bother. But the problem lies as stated elsewhere that it is normally the positive that is switched and not the negative. As such the appliance could be live when you do not expect it.
Some appliances could be sensitive, but more to the point some users could be very sensitive. I am the latter and prefer to take caution, especially when it only means an extra short length of cable to be on the safe side.

Colin

And we use one just to get ride of that nagging red light on our extension lead

Randa