The majority of leads for sale on eBay are sold without RCD (residual current device) protection which could result in an higher risk of danger / electrical shock to you, BEWARE this could save you a little money but look at the quality difference of the products on offer - what price would you put on your own saftey or that of your families ?
Any camping hook up cable that you are considering buying should incorporate a 30ma RCD & MCB as this could save your life, this can be bought at the time of writing this guide for as little as £53 + p&p.
An RCD protective device is not there for overload protection as indicated incorrectly in other guides on eBay as this is the job of the MCB, it is there to ensure should a fault occur then the electricity is disconnected with 40 milliseconds and it actually verifies what is supplied through the Phase conductor returns via the Neutral conductor if the device detects that the return is not equal to the supply it recognises that electricity is leaking this could be due to a fault on an appliance and /or it could be due to you getting a electrical shock and the supply will be disconnected within 40 milliseconds!
To confuse matters all UK campsites will have a RCD at there end and this is how most of the sellers offering hook up leads without an RCD try to dismiss the fact that you need one, YOU DO! - Take it from me as a Electrician with over 10 years experience!
BEWARE of what you are buying as some of the items offered as Camping Hook Up Leads are potentially lethal, most are simply made up of general extension lead with the plug top changed to BS EN 60309-2, IP44 3 pin round plug. This could be done by anyone with basic skills for around £15.
TO RECAP ANY LEAD YOU ARE CONSIDERING PURCHASING TO USE ON A
CAMPSITE OR EVEN OUTDOORS SHOULD INCORPORATE A 30ma RCD !
If in doubt why not visit http://www.ukcampsite.co.uk and ask other campers for there advice!