is london electricity 2 socket or 3 ?

Answer 1

Europe's electrical system is different from the United States' — both in the plugs used and the voltage of the current. American appliances run on 110 volts, while European appliances are 220 volts. (Note that these numbers can vary slightly — for example, 120 instead of 110 volts in the U.S.) You can destroy your American appliance if you plug it directly into a European wall outlet.

There are two different components you'll need to plug in American gear overseas: A converter changes the electric current from European to American. A small adapter allows American-style plugs (two flat prongs) to fit into British outlets (which take three rectangular prongs) or continental European outlets (which take two small, round prongs). While there are some combination converter-adapters, you'll more likely need to deal with each of these issues separately.

Most new electronic travel accessories come with a built-in voltage converter that works in both the U.S. and Europe. These converters "autosense" the voltage from the wall outlet. If you see a range of voltages printed on the item or its plug (such as "110-220"), you're OK in Europe. Older appliances have a voltage switch marked 110 (U.S.) and 220 (Europe). Ask the salesperson when you buy. Often, buying a new travel appliance with a built-in converter can be smarter than buying a separate converter (around $30) to use with your old appliance.

Even if you've got a built-in converter, you'll still need to buy a plug adapter. Remember that British plugs (three rectangular prongs) are different from continental European plugs (two round ones). I bring each kind (handy for long layovers in Heathrow Airport). Secure your adapter to your appliance's plug with electrical or duct tape; otherwise it might stay in the outlet (and get left behind) when you pull out the plug. Many sockets in Europe are recessed into the wall; your adapter should be small enough so that the prongs seat properly in the socket. Cheap converters with built-in adapters often have prongs that are the right size but do not seat properly.

Many budget hotel rooms have only one electrical outlet, occupied by the lamp. Hardware stores in Europe sell cheap three-way plug adapters that let you keep the lamp on and your camera battery and PDA charged. For more information on plugs and adapters, consult TeleAdapt (www.teleadapt.com).

Answer 2

Three

Answer 3

three.
if you need a power converter go to the luggage section and find a power converter its about tweenty dallorsand has one for every country its a great deal!
i hope that helped you out!
-katie

Answer 4

it's 3-pin plug
here's the pictures:
http://www.tlc-direct.co.uk/Images/Products/size_3/TLPT13.JPG

http://www.allaboutelectrics.co.uk/media.php?file=2156