Rural home to the main line of only two wires, zero line of fire line without ground. Now the house is ready to build, how to operate the ground? There is to install the lightning rod to the ground with the ground line there is no conflict and the like? More
6 / 1kv such as VV, YJV control cable is 450 / 750v such as KVV, KVVP general power cables are within 5 core is generally used for strong control cable core is more, sometimes the customer does not One, generally to the 37-core, but there are more cores, ============ The following is the relevant information Power cables in the power system trunk line for the transmission and distribution of large functional power, control cable From the distribution point of the power system to the direct transmission of electricity to a variety of electrical equipment, power equipment, connecting lines
In fact, in order to avoid the lightning surge device encountered a strong lightning current when the electrical grounding wire will be damaged even if the household electrical appliances, even in the actual construction of the two ground wire must be connected separately, Accident occurred.
The rated voltage of the power cable is generally 06 / 1kV and above, the control cable is mainly 450 / 750V The same specifications of the power cable and control cable in the production, the power cable insulation and sheath thickness than the control cable thick First, the control cable belongs to the electrical equipment cable, and the power cable is the cable five categories in the two The standard for the control cable is the standard of the power cable is the color of the insulated wire core of the GB control cable is generally black and white, and the low voltage of the power cable is generally separated Control cable cross-section is generally not more than 10 square feet, the power cable is mainly the transmission of electricity, are generally large cross-section As mentioned above, the specifications of the power cable in general can be larger, as large as 500 square feet (conventional manufacturers can produce the range), and then a large cross-section can do the manufacturers to be relatively less, and control the cable cross-section in general Smaller, maximum no more than 10 square feet From the cable core number, the power cable according to the power grid requirements, up to the general 5 core, and control cable transmission control signal, the core number is more, according to the standard more than 61 core, but also can be produced according to user requirements The
From the laying of the environment, one in the land of a sea in the water below the sea cable to have better water tightness and mechanical strength, and more susceptible to erosion of seawater and external machinery damage; from the structural point of view, submarine cable cable With lead shield and strong armor (such as thick round steel wire armor), etc., to improve its corrosion resistance and mechanical strength, the cable is generally used wrinkled aluminum jacket, in addition to special circumstances, the general do not armor; Insulation form, and now the basic cable is insulated with cross-linked polyethylene, submarine cable from the safety and operation of a comprehensive point of view, still more use of oil-filled cable; from the construction point of view, the cable can be distributed conveyor, the middle also Can be manually assisted, sea cable by the construction of the ship + knife plow to complete, some of the simple use of frogs to help; generally no cable between the cable as the insulation or through joints, the middle is not easy to ground; sea cable due to the sea, Low and good heat dissipation, so its large capacity
