1. According to the degree of softness and hardness of the wires, ordinary Yantai household wires can be divided into the following two categories at present:

　　 hard wire (abbreviated as BV wire), mainly used for daily home outdoor power supply, lead wire, erection, etc.;

　　 flexible cord (abbreviated as BVR cord), mainly used for daily household indoor power supply, lighting, sockets, threading, etc.;

　　 hard and flexible wires are composed of single and several copper core wires respectively;

Second, the choice of home wire diameter

　　1. Power supply to the home: generally 6 square BVVB sheathed wire (double core) is used.

　　2. Power supply for indoor sockets, kitchen sockets, etc.: Generally 2.5 square (or 1.5 square) BVVB sheathed wires (dual cores) are used.

　　3. Electricity for lighting: 1.5 square (or 1 square) BV wire (single core wire) is generally used.

　　4. Electricity for air-conditioning: generally 4 square (or 6 square) BV wires (single core wire) are used.

　　 5. Water heaters or electrical appliances with withstand voltage above 5000V-7000V: generally use 4 square BVVB sheathed wires.

　　Note: When wiring, use one color for the live wire, one color for the neutral wire, and a two-color wire for the ground wire or a color different from the neutral wire for the live wire. Try to use red as the live wire, green, yellow, blue and black as the zero wire, and the two-color wire as the ground wire.

Matters needing attention when purchasing Shenzhen household wires and cables:

　　1. Check whether the wire meets the power consumption quota requirements, whether there is a product inspection certificate and a special mark for product quality;

　　 2. Look at the material of the wire core, the better the material, the better the quality;

　　3. Look at the quality of the PVC material of the wire and cable. The better the quality, the lower the probability of leakage;

　　4. Look at the length standard of each coil, whether the weight is sufficient, and the operating temperature is -30 to +70 degrees Celsius;