Mains Plug Fuse Rating

Automotive glass fuses were made in different lengths to prevent high rated fuses being installed in a circuit intended for a lower rating.

Mains plug fuse rating.

Rated 4 50 out of 5 9 60. 13a fuse washing machine dishwasher microwave kettle toaster iron. For an appliance rated as 700w or less a 3a fuse should be fitted. Hifi tuning gold audio fuses for uk mains plugs.

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. In practice most bs 546 plugs are unfused with fused versions being unusual and expensive. Glass cartridge and plug fuses allow direct inspection of the fusible element. Manufacturers have now standardised plug fuse ratings to be either 3a or 13a.

These are 20mm long to fit inside uk equipment it is important you fit the same fuse rating as per the original fuse. Plugs for appliances rated between about 700 watts and 3000 watts the maximum rating of a wall socket should be fitted with a 13 amp fuse coloured brown. Mcru rhodium plated uk plug fuses. Rhodium plated end caps.

For appliances above 700w a 13a fuse should be fitted. 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. The 15 ampere a sockets were generally given a dedicated 15 a circuit. 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.

13a rating only.