If a fuse is wrapped in silver paper and then the rate of rise in over-current (within the faulty appliance) is as much as 100mA per hour, even if your over-current protective device is as little as half an amp too large, it is still going to take 5 hours with your cable exceeding its' current carrying capacity before the device even notices that there is a problem!
If a fuse is wrapped in silver paper and then the rate of rise in over-current (within the faulty appliance) is as much as 100mA per hour, even if your over-current protective device is as little as half an amp too large, it is still going to take 5 hours with your cable exceeding its' current carrying capacity before the device even notices that there is a problem!
