The docking of wires with different diameters can easily cause accidents such as heat and fire.
The thickness of the wire actually refers to the size of the cross-sectional area of the wire, in general, the larger the square of the wire looks thicker. For example, a 4mm? wire is thicker than a 2.5mm? wire. The thickness of the wire size selection is based on the power to be used to determine the power. If the wire is used in an environment where the power consumption is higher, the cross-section of the wire needs to be a little larger.
Usually, home wires generally only need to load some lighting equipment, air conditioning, range hoods, refrigerators, induction cookers, ovens and other electrical appliances power. Lighting equipment with 2.5 square wires can be, the power of the larger appliances due to more dedicated line store, choose 4 square wires is also enough to use.
Therefore, the decoration of the wire as long as the power consumption, power can be considered, and not the choice of the thicker the better the wire. If you choose too thick wire, the first is the loss of large, the second is easy to cause safety accidents.
Extended information:
Heating phenomenon
The phenomenon of heating wire joints, generally the first manifestation of the wire joints around the odor, can be smelled, this is due to the wire joints heat so that the insulation layer of the outer wrapping produce odor; secondly, the wire Joints smoke, red, black insulation, fire, and even break the line.
Heating wire joints will not only cause a large amount of power loss, but also seriously affect the normal operation of electrical equipment, light is the line in the increase in working current, shorten the life of electrical equipment, or suddenly interrupt the ongoing production, scientific research, medical surgery and other activities, but also lead to fires and electrocution accidents and so on, resulting in incalculable losses.
By the installation of the place can be divided into indoor and outdoor type two. According to the production and installation materials can be divided into heat-shrinkable (the most commonly used one) dry pack type and epoxy resin casting type and cold shrinkage.
By the core material can be divided into copper-core power cable head and aluminum-core power cable head.
It's main role is to make the line smooth, so that the cable to keep sealing, and to ensure that the insulation level of the cable joints, so that it can run safely and reliably. If the seal is poor, not only will the oil leakage cause the oil-impregnated paper to dry out, but also moisture will invade the inside of the cable, so that the paper insulation performance degradation.
Reference:
Baidu Encyclopedia-Wire Joints