Scrape the joints at the copper wire bright, with a soldering iron will be joints dip some rosin, and then welded with solder wire.
Heating wire joints will not only cause a lot of power loss, but also will seriously affect the normal work of electrical equipment, light is the line in the work of the current increases, shortening the life of the electrical equipment, heavy is the sudden interruption of the ongoing production, scientific research, medical surgery and other activities, but also caused by fires and electrocution accidents and so on, resulting in incalculable losses.
Extended information:
The temperature setting is very important for welding operations. The optimum temperature for soldering operations is +50 degrees from the melting point of the solder being used. The setting temperature of the soldering iron tip, due to the size of the soldering part, the power and performance of the soldering iron, the type of solder and the wire type of the different, in the above temperature on the basis of an additional 100 degrees is appropriate.
The junction hoop only plays a role in fixing the connected wires, so in the operation, especially in the maintenance operation, from the junction box to repeat pulling in and out of the wire joints used in the force are not concentrated in the wire joints, but transferred to the junction hoop on a few small holes, which protects the wire joints very well. The wire connector is not easy to loosen, so it improves the safety of the wire connector.
Baidu Encyclopedia - Wire Joints
Baidu Encyclopedia - Soldering