Mains Plug Fuse Rating

If it s a rewireable type plug and the original fuse size fitted by the manufacturer is not known the recommended method is to use the 700w rule.

Mains plug fuse rating.

Rated 4 50 out of 5 9 60. For an appliance rated as 700w or less a 3a fuse should be fitted. Mcru rhodium plated uk plug fuses. So if you have a 240 volt heater rated at 3 kw 3000 watts it will have a load of 12 5 amps therefore it requires a fuse rated at 13 amps.

Automotive glass fuses were made in different lengths to prevent high rated fuses being installed in a circuit intended for a lower rating. Glass cartridge and plug fuses allow direct inspection of the fusible element. Hifi tuning gold audio fuses for uk mains plugs. Rhodium plated end caps.

These are 20mm long to fit inside uk equipment it is important you fit the same fuse rating as per the original fuse. 13a fuse washing machine dishwasher microwave kettle toaster iron. In practice most bs 546 plugs are unfused with fused versions being unusual and expensive. The problem in most homes is that if a replacement plug top is fitted to an electrical item it will more than likely be fitted with a 13 amp fuse regardless of what the wattage is.

All uk moulded plugs bs1363 must have the fuse rating marked on them. For appliances above 700w a 13a fuse should be fitted. Manufacturers have now standardised plug fuse ratings to be either 3a or 13a. The 15 ampere a sockets were generally given a dedicated 15 a circuit.

Plugs fitted with bs 546 fuses have been optional since the original bs 546 1934 with maximum fuse ratings of 2 a in the 2 a plug and 5 a in the 5 a 15 a and 30 a plugs.