Trading Standards have issued an urgent notice advising that some highly dangerous fuses for use in 13 amp plug tops, fuse spur boxes and other electrical equipment are currently on sale within the UK. These fuses are labeled PMS and are manufactured in China. Trading standards officers have identified a significant number of these PMS 13 amp fuses which fail to comply with the appropriate British Standard BS 1362. Trading Standards are also concerned about 3 & 5 amp PMS fuses which are made by the same company using the same manufacturing process. Under overload conditions the fuses may explode, with an inherent risk of fire, sometimes shattering the plug top and, in extreme cases, blowing the plug top out of its socket.
It is unlikely that any electrical equipment or fuses supplied over two years ago will be fitted with unsafe PMS fuses. PMS fuses manufactured before this period were made in the UK and are not subjected to the contents of this notice. PMS fuses over two years old can be readily identified by a dog tooth pattern printed on the ceramic part of the fuse near the metal end cap, or a trade mark, consisting of a circle with a letter A inside it, immediately after the BS 1362 label. These fuses are not subject to the contents of this safety notice. PMS 13 amp plug tops are, also, not subject to this notice, although the associated fuses might be.