BS 1363 is a British Standard which specifies the most common type of Plug For Uk & Ireland (three Pin Cord) that are used in the United Kingdom and Ireland. Distinctive characteristics of the system are shutters on the line and neutral socket holes, and a fuse in the plug. It has been adopted in many former British overseas territories; Ireland, Malaysia and Singapore have equivalent national standards. BS 1363 was introduced in 1947 as one of the new standards for electrical wiring in the United Kingdom used for post-war reconstruction. The plug replaced the former BS 546 plug, which is still found in old installations or in special applications.