This socket connects to the mobile catering trailer/van inlet socket (16 amp).
This socket goes at one end of your extension lead. It is worth keeping this item as a spare so that when you are in the middle of a field or in a remote area and the need arises you are prepared.
You may also need to order a trailer mains plug for the other end of the extension lead.
Looking for a mobile catering trailer or catering van visit www.exceltrailers.co.uk