The assortment of 12-volt connectors found in campers, motorhomes, and caravans here does make things a little complicated at times.
There are about five types commonly found:
1. The standard cigarette lighter style.
2. The smaller DIN connectors which are similar in appearance to a cigarette lighter plug but smaller. Not so common as other types.
3. The two parallel, flat-blade plug as in the first eBay link above.
4. Another flat-bladed plug which is very similar but has the blades set at a slight angle to each other (
not as much as an Aussie 240V plug or a U.S. "crowfoot" plug though).
5. The 3-pin 2-amp BS546 plug/socket, as was once common for 240V lighting outlets in homes. The original L and N pins are normally positive and negative respectively, with the original earth pin being unused.
Note the various plugs and adapter leads available here:
http://www.towsure.com/default.asp?t=476 [This message has been edited by pauluk (edited 09-23-2006).]