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

Product Information

The rated current may be any value not exceeding 13A. For use in plugs, the preferred rated currents are 3 A and 13 A."

The operating characteristics of a device protecting a conductor against overload shall satisfy the The genuine 13A Bussmann fuse also has a solder bead on the fuse wire which is missing on the fake.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. Now I did not quite use Chris's figure of 3 mins at 20 A, but if I had it would have scaled to 3mins/100 at 200A, or about 2 seconds for a 40 degree rise. I had a more optimistic figure, allowing a bit for the PVC, and as I did not have the regs with me, so used a pidooma figure from memory. 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. The wire inside a fuse heats up when a current passes through it. The more current that passes, the hotter the wire will get. If the current is high enough, the wire will melt and cut the power to the appliance. The rated current of the fuse, in this case 13A, is the current that it can safely pass whilst maintaining a low enough temperature not to overheat the plug. BS 1362, the British Standard for the fuses used in plugs, specifies a maximum power dissipation of one watt when carrying the rated current. The rated current or current setting of the protective device (In) is not less than the design current of the circuit and

Reference 4F3A a 1.5mm2 single phase AC flexible cable has a tabulated current carrying capacity of 16amps. 16x0.763 = 12.208 amps which is obviously less than the 13 amp rating of the fuse. The dimensions meet the BS1362 requirements and it also contains a sand filling. If it were not for the incorrect licence numbers being printed on the fuse, there would be no reason to suspect that these were counterfeit. The current (I2) causing effective operation of the protective device is given in the product standard or may beSurprisingly the fuse does contain the sand filling required, most counterfeit fuses do not have any filling. The sand is required to control the breaking operation of the fuse. Without this filling material, the air within the fuse expands as the fuse wire melts and arcs, causing the fuse to explode, as demonstrated in our previous article on fake 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. Leading on to… 433.20/202 where an allowance is made for the fusing factor of a 3036 fuse. If the fusing factor of a 1362 is at 1.9 it is fairly comparable so surely we must apply a comparable derating factor? This is where the wheels come off my bus if the answer is more than just… It doesnt protect against overload.