HRC Fuse Types High rupturing capacity (HRC) fuses feature a transparent capsule around the central resistor. For example, if an electric drill requiring a new fuse has a 700-watt rating, divide this by 230 (the standard UK mains voltage). The result is 3.04, so you will require a 3A amp fuse for the plug. Where Would a Type D Fuse Be Installed?

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. It is important to note that the section of cable coming from the battery +ve terminal to the first fuse (or battery distribution box) is effectively an unprotected part of the circuit. If there is a short anywhere along this length then it is very likely to catch fire as the first fuse will not experience the excess current. For this reason the length of cable from the battery +ve to the first fuse should be as short as possible so that damage is minimised in the event of an electrical fire.

The size of fuse depends on the appliance or equipment that it is feeding.

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!" Slow Acting fuses include a delay mechanism that allows short, lower power electrical surges to pass through the circuit without the fuse blowing. They are also known as Slow Blow or Time Delay fuses. Dual Element fuses feature a higher performance delay mechanism

The definition of a D-type fuse is a miniature circuit breaker that trips when the current exceeds the rated level by between ten and 20 times. Therefore, a 16 amp Type D breaker will trip if the current reaches between 160 and 320 amps. Type F Fuses As modern day living has progressed and technology improves, lightbulbs are changing over to LED. A lot of the LED lightbulbs are 5 W (that’s one 20 th of a hundred watt lightbulb) so a calculation for this would be: Striker fuses are fuses fitted with a spring-loaded striking device that can trip adjacent switches and also indicate that a fuse has blown. Type C Fuses Fuses and circuit breakers serve a very similar function - both break electrical circuits in the event of a current surge or short circuit. However, there is a crucial difference. Circuit breakers are switches, and like all switches, they can be reset once they have been flipped. Most fuses, though, can only be used a single time. Once they have blown, they must be replaced. They are, by definition, a weak link - entirely by design. If replacing a blown fuse in a manufacturer-designed (factory) application, e.g. in a vehicle fuse panel, then the same type and rating of fuse should be used. If a fuse continues to blow then there must be a fault with the circuit and a higher rating fuse should never be fitted to overcome this, even temporarily. Doing this creates a high risk of component failure and electrical fire.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.