Why can't fuse be replaced by copper wire?
The original, although also a fuse wire, but it is different from the ordinary copper wire of.x0d, it is soft and is composed of lead, antimony, lead or tin made of low melting point alloy. Its resistivity is relatively large, relatively low melting point, are afraid of heat. Due to the thermal effect of current, as long as the current through the the fuse exceeds the rated current of the fuse, to fuse current, the fuse will be quickly fuse, automatically disconnect circuit and power. So, strong current cannot enter the user's home to
Then, in order to prevent in the circuit in the instrument, electrical wires or because of strong current and burn.x0d fuse, can not use copper or iron wire instead. If the copper wire or wire to replace the fuse, due to their high melting point, even if the current through the fuse, will not, can not be automatically cut off current to not play the role of insurance, it is dangerous to.x0d in addition, install the fuse, must pay attention to choose suitable thickness of it. The fuse specifications, usually expressed in its current rating.
The fuse of the same material, the larger diameter section, allows the rated current is greater. So when the choice, must according to the total number of tiles for the electrical appliances, calculated by the maximum working current of the circuit, the maximum operating current to the rated current of the fuse is equal to or slightly greater than the circuit. In this way, both the fuse can work normally, and can ensure the fuse can quickly fuse, when excessive current cut-off circuit. If the fuse rated current is too large, when had strong current through the circuit, it does not fuse, would not achieve the role of insurance and the wire, wire no what two if the rated current is too small; so, in the case of normal use of electricity, the fuse will fuse, causing power outages.
