Boxes adapted for use with electric plug sockets; sockets, plugs and other contacts (electric connections); boxes adapted for use with electric plug sockets; containers incorporating electric sockets; electric connector sockets; electric extension outlet sockets; electric power supply sockets; electric sockets; electrical sockets; plug sockets (electric); plugs, sockets and other contacts (electric connections); portable electric sockets (power boards); relay sockets; sockets (electrical); sockets for electric plugs; electric connectors; electrical connectors; electrical plug connectors; female connectors for electrical cables; male connectors for electrical cables; plug connectors (electric); plug-in connectors (electric)