Nartel® BS1362 Fuse Cartridge 13 amp for UK plugs (Pack of 10)

£9.9
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Nartel® BS1362 Fuse Cartridge 13 amp for UK plugs (Pack of 10)

Nartel® BS1362 Fuse Cartridge 13 amp for UK plugs (Pack of 10)

RRP: £99
Price: £9.9
£9.9 FREE Shipping

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Well a 13 A fuse will carry 13A all day, and may not blow in any sensible time even at 20-25A, depending on manufacturing tolerances and environmental temperatures.

The operating characteristics of a device protecting a conductor against overload shall satisfy the following conditions: The car draws 250 to 300A to spin the starter. How long can I crank the engine while my son and the nervous alarm man hold the 2.5mm onto the 2 batteries without burning either of them ? Simon's response correlates with what my understanding is telling me - which seems at odds with the pretty confident guidance/statements in the Beama guide. Part 2: Overcurrent: A current exceeding the rated value. For conductors the rated value is the current carrying capacity.HBC stands for high breaking current and refers to the maximum current that the fuse can handle without breaking. It is also known as HRC (High Rupturing Capacity). Look at these curves and look at the ‘all blow’ right hand curve, vs the left hand ‘never blow’ limit for 13 and 3A fuses. So there we are, a 2.5 sqmm cable loaded at 20 A will take over 45 minutes to get up to 70 deg C from 20 deg C enclosed in conduit in an insulated wall. Any smaller loading or less lagging and it will never get there because the heat generated in the conductors will always be less than the available heat loss. is 0.71 correct for the fuse type, I see some records point to 0.87 for non 1.45 fuse factor devices) The length of the fuse measures 24.91mm. A BS1362 fuse should have a length of 25.4mm with a tolerance of +0.8/-0.4mm.

iii) the current (I2) causing effective operation of the protective device does not exceed 1.45 times the lowest ofI've been cogitating on the fusing factor of 1362 fuses (specifically 13A fuses) and how this correlates with the protection of a 1.5mm2 flexible cable. As ever I am hoping you can shine a light!

At the beginning, 100% of the heat generated in the live conductors is available to heat the cable. At 21 deg C, only 98% of the heat is available because the loss is 1/50 of the amount at the steady state. At 22 deg C, only 96% is available and so on. So looking at 1 deg C increments, it takes in fact 45 min to get to 69 deg C and you never quite get to 70 deg C. Please forgive me for having forgotten the calculus which I learned 45 years ago. The shiny metal end caps are also a good indicator that the fuse is not genuine. The end cap on the genuine Cooper Bussmann fuse is not as shiny. This fake fuse also has a larger than normal dimple in the end of the cap. The length of the fuse is too short. A plug top fuse should have a length of between 25.0 - 26.2 mm. The diameter of the of the end cap measures 6.05mm and does not meet BS 1362 either. It should be 6.25 - 6.5 mm In reality only AWE or CERN will install a cable in vacuum like that, and of course any real cable will heat quite a lot more slowly.

These fuses are “F” speed rated, which is short for Fast Acting. This is also known as fast blow and is popular in general purpose applications. They are designed not to handle current spikes over the rated current. It is a setting where a circuit experiences a current that is higher than the normal operating current.

If you are purchasing fuses online, we recommend only using a reputable supplier such as RS Components or Farnell. Both of these companies are able to provide data sheets and compliance documentation for the products they sell. Identifying counterfeit electrical equipment is becoming an important part of the inspection process and is something that we cover in our courses. Counterfeit BS1362 Fuse Testing Breaking capacity is the level of current that the fuse can safely handle without exploding or breaking. The breaking capacity of your fuse should be greater than the fault current of your electronic circuit.

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The rated current or current setting of the protective device (In) is not less than the design current of the circuit and Breaking the fuse open confirms that these fuses are counterfeit. There is no sand filling. The quartz sand inside a genuine BS1362 is designed to control the rupture of the fuse wire within the ceramic body. The rated current may be any value not exceeding 13A. For use in plugs, the preferred rated currents are 3 A and 13 A." Danger of damage comes very specifically, and this is a long relatively small overload, not for the odd hour, but weeks at a time. This time allows the cable to reach thermal equilibrium with the environment but is insufficient to open the CPD (fuse or breaker) because of its fusing factor. Breakers have lower “fusing factors” than fuses, so,in fact, provide more protection from this situation than fuses. I appreciate that there will be manufacturers tolerances both for the device and the cable (which could go both ways) and that there is undoubtedly going to be some headroom in the cable. I've seen a plumber leave a 9.0kW electric boiler on a bit of 1.5 flex before and yeah (prior to me fixing it) it was pretty hot after a few hours but it hadn't melted! Is the answer just that we're only talking about an extra amp in the example and whilst it may get a bit hotter than would be ideal this isn't the end of the world or are we into the realms of trying to work out how much heat is being dissipated during the fault by the flex as it is going to be happening over quite a prolonged timeframe?



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