CCC logo is the first choice.
The "CCC" symbol of national compulsory certification is the first choice for wire selection, which can ensure the quality of wires without worry. In addition, don't forget to check the product name, factory name, trademark, specifications and other information on the wire to ensure the quality and safety of the wire.
The color of the wire is exquisite.
The color of the wire also needs attention. According to the building code, the power supply is three-phase five-wire system. Three-phase wires A, B and C are yellow, green and red respectively, the zero line is blue, and the grounding wire is yellow/green. Choosing the right color can not only ensure safety, but also be beautiful and generous.