In the UK, the majority of domestic appliances can stay with a pre-fitted moulded plug. The plugs have either a 3 amp or a 13 amp rated fuse - It is very rare that you find anything inbetween although there are other fuses available. The plug with its fuse for the appliance make the minimum protection required for your piece of equipment/appliance. An incorrect fuse however will continually blow if it is incorrectly rated or fail to protect your equipment from a catastrophic meltdown if it is too high. Lastly, an RCD is NOT the panacea of all evils, they do not protect against overload or short circuit, only live to earth faults. Kettles have a wide range of wattages depending on if it is a slow boiling kettle, or a rapid boiling kettle.

The 10, 30, 100, 300mA residual rating is the residual rating. This is the live to earth fault current that the device will detect. An electricity cable (or flex) used for connecting an electrical appliance to the plug will usually contain two or three wires wrapped in coloured insulation. These are commonly called “ two core“, or “ three core” cables; not to be confused with “ twin and earth” which is the term used for mains wiring cables, although there is no real reason why the terms can’t be interlinked. The standard UK plug is like no other in the world; it has three chunky, metal pins when most others just have two, and the plug in the main is bigger than elsewhere in the world – how can they get their electricity on such a smaller unit than us? However a 13 amp fuse would be fitted as standard into the plug by the manufacturer, any fuse lower than even the 10 amp would fail.

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Fuse boxes have a number of alternative names, including control board panels, distribution boards, breaker panels, fuse boards, and fuse panels. Domestic fuse boxes are frequently referred to as consumer units. What is a Switch Fuse Unit? Cylindrical fuses are a basic design and many of the most widely used and familiar models fall within this category. HRC Fuse Types The calculation would be 2200 Watts divided by 240 Volts equalling 9.17 A +10% which equals 10.087 amp. So from this calculation the ideal fuse would be a fuse of around 10 A amp. What size fuse do I use in a fused spur? The size of fuse depends on the appliance or equipment that it is feeding. So from this calculation the ideal fuse would be the one amp fuse, but again, most manufacturers will have put in a three amp fuse. Typical example: A Kettle.

Ultra-rapid fuses: typically used in sensitive circuitry and transistors to protect against short circuits, reacting almost instantaneously. These are also known as Very Fast Acting, Super Rapid and High-Speed fusesThe wires are cut to the wrong length– To be fully correct, the coloured wires should have been cut at better lengths so that the white covering is fully into the plug before it is secured. Most plugs actually have a cable grip that screws across the main outer insulation sheath. Switch fuse units distribute current while shielding cables and devices from the damage that would be caused by power fluctuations along a particular electrical circuit. Switch fuse units are used in industrial and commercial buildings as well as domestic properties.