Copper household wiring can be cut by fire.
First of all, we need to understand that the melting point of copper is around 1000°C, which depends on the cross section of the copper.
Flame temperature (the combustion temperature of different substances is different, depending on the ignition point). Even if the same substance is burned, the flame produced will have different temperatures due to different parts, such as). like alcohol. The external temperature of the flame that burns the lamp is high, while the internal temperature of the cigarette combustion can reach more than 800 degrees... For different objects, because their combustion values are different, the temperature of the burning flame is also different, and there is also the degree of combustion factor, which is the oxidation reaction. The intensity of the flame is very different between the alcohol lamp and the blowtorch.alcohol. Generally, the flame cannot be completely oxidized because of this. insufficient internal contact with oxygen, so the interior flame temperature is lowest. That's why it doesn't feel hot when you blow out the candle with your hands. The reason is 500 to 600 degrees.
If it is a fire in the sun, it is several thousand degrees.)
I made some wires enameled, and the copper wire can only be inserted on the flame side when the head is leaking. on the other side, the part of the head that escapes will melt and produce a gray-black substance. The part in the middle of the candle flame will not melt, and the drain part will stop melting immediately when burning in the flame. If the extension speed is fast and the extension length is long, only a few millimeters close to the flame will melt.
Final conclusion: the temperature of the candle flame itself is close to the pointcopper smelting. The rate of oxidation of copper wire accelerates at high temperatures. The heat released during oxidation causes the copper wire to heat up. and reach the melting point.