MK Logic Plus Socket Outlet with green outboard rocker and dual earth terminal. It is designed for ease of installation and having all the advantageous design features of the Logic Plus range. The 2 gang sockets with outboard rockers are of particular value for use by the infirm and partially sighted. Non-standard clean earth sockets are for use on installations where restricted access is required and will only accept MK LN647 13A non-standard plug with T-shaped earth pin. The sockets have two independent earth terminals so that they can also be used for ‘clean earth’ installations. K2746 CE WHI has two independent earth terminals for ‘clean earth’ installations. K2746 WHI and K2757 WHI are fitted with two earth terminals on a common busbar to provide a double earth facility for use when installations require a high integrity protective connection as specified within BS 7671: 2008.