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 fuses If you do have a fuse, and there’s a short, the fuse will blow before letting too much current through your wires.

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. Unsurprisingly for such a widely used component, fuses are available in a multitude of models and voltage capacities for use in different industrial, manufacturing and electronic settings.A mains plug takes a 25.4 mm (1.25 inch) BS 1362 fuse, these fuses are available from any local supermarket or DIY store. They are cheap so don’t risk stealing a fuse from another appliance just to get your appliance going, unless you are using a fuse of the same rating. So you just bought your stuff at Oznium and are getting ready to plan your installation while USPS gets it to your door. One of the first questions to ask when planning your installation is what size wire to use, which will later determine what fuse to use.

In other instances, where an electrician may have found that there is no lighting circuit cables to the area where customers require lights, a fuse spur may have been introduced to feed the new lighting circuit. This fuse spur might have a three amp or a five amp fuse in it depending on the amount of lights within the circuit. You will typically find this when there has been an extension such as a conservatory, or you have installed garden lighting. You’ll usually find the fuse rating on the side of your fuse, which will be given in amps. Fuse rating is the amount of current needed for the fuse to blow or break. When this happens, it stops the electrical power from flowing through the electrical circuit. Why are fuses rated?Most people get caught up on fuse wire size but once you get the hang of it, it shouldn’t cause too many headaches. This is an in-depth fuse tutorial explaining everything you need to know about fuses and how to size a fuse. We’ll go into all the relevant details and what it all means so you’ll go from novice to pro in no time at all. When a fuse blows, the electrical supply to a particular circuit is immediately cut off. This lowers the risk of fire and prevents damage to the wiring. The blown fuse can safely be replaced without the risk of electrocution. Are Old Fuse Boxes Illegal? You can use Ohm's Law to calculate the required rating for a fuse. Divide the power of the attached device (measured in watts) by the voltage of the power supply. If the result is a fraction, round this up or down. I have a pre-fitted moulded plug on my appliance and there is no fuse? I have no idea what type or fuse rating I require!"