French standard NF C 61-314 "Plugs and socket-outlets for household and similar purposes" defines a round plug with two round pins measuring 4.8 by 19 mm , spaced 19 mm apart and with a hole for the socket's earth pin. This standard is also used in Belgium, Poland, the Czech Republic, Slovakia and some other countries. Although the plug is polarised, there is no universally observed standard for placement of the line and neutral. However, the Czech standard recommends the line wire to be on the left side when facing the socket. Add to that the French convention changed circa 2002 from nothing particular, to, if the earth pin was at the top then the line hole in the socket would be on the right looking at the socket. However, the socket may not necessarily be installed with the earth pin at the top. Packaging in France of said sockets is normally marked with correct orientation of the cables. Polarised pre fitted plugs on appliances are therefore connected with the brown to the right pin and the blue to the left, the earth being connected to the hole at the "top" of the plug.