It is marked- "use only with MK non-standard sockets" Fused male plug in white- fitted with a 13A fuse For use only with MK non-standard 13 amp socket outlets. MK Logic Plus 13A Non Standard Safety Plug White - Specs It is not third party approved as the earth pin is 'T' shaped; however, the pin configuration conforms to BS 1363 pin centres It is designed specifically for use with MK non-standard sockets such as K1257 WHI It is a non-standard three pin fused 13A rated with cable size 11mm Colour- White Current Rating- 13A Fuse Fitted- Yes Number of Pins- 3 pin plug Type- 13A Three Pin Fused Plug Voltage Rating- 230V mains voltage