How to choose the right type of cable and cross-sectional area? Our Qingdao cable manufacturer to introduce for you!

1 Wire and cable factory tutor you the choice of wire and cable type

(1) First of all, copper or aluminum core wires and cables should be selected according to the location and load characteristics, due to the high conductivity of copper, low loss of copper, good mechanical ductility, easy processing and installation, high fatigue resistance, specification requirements: Flammable and explosive places, important public buildings and residential buildings, especially places with aluminum corrosion and humidity and places where people gather more, important data rooms, computer rooms and important warehouses, mobile equipment or places with severe vibration, and other places with special provisions should use copper core wires; Because of its small proportion and light weight, aluminum wire and cable are mostly used in overhead transmission lines and medium-frequency lines with large cross-section, and because of the low cost of aluminum, it has also been widely used in many places.

(2) Select the insulation type of the wire according to the laying method and environmental conditions. PVC wire and cable low cost, acid and alkali resistance, suitable for general engineering. However, when PVC wire and cable burn in a fire, it will produce highly toxic smoke, causing people to suffocate, and the sediment in the smoke is conductive and corrosive, so crosslinked polyethylene, halogen-free ethylene propylene rubber and cable can be used in places with low toxicity and fire resistance requirements; For fire power supply and control lines, the automatic fire alarm system should correspond to the use of mineral insulated cables or organic insulated refractory wire and cable according to the level of the protected object, and its branches should be selected from the trunk or trunk of the lower level of wire and cable. For buildings with high requirements such as a class of high-rise buildings and important public places, flame retardant low-smoke halogen-free crosslinked polyethylene insulated power cables and wires or smoke-free halogen-free power cables and wires should be used.

(3) Correctly select the rated output voltage through the wire and cable. The insulated conductor should meet the requirements of the voltage provided by social work, the plastic insulated wire laid indoors should not be lower than 0.45/0.75kV, and the power system cable enterprise should not be lower than 0.6/1kV. The choice of rated current and voltage of the control network cable should not be lower than the voltage in the working process of the circuit, and 0.45/0.75kV should be generally selected. When the influence of external environmental electrical information interference factors is small, you can choose to have a lower rated input voltage.

2 Wire and cable manufacturers teach you the choice of wire and cable section

National standard wire and cable manufacturers will be in accordance with the "Civil Enterprise construction engineering electrical system design Code" JGJ16-2008(the following issues referred to as "civil regulations") article 7.4.2 pointed out that the selection of low-voltage distribution conductor cross-section should meet the following requirements:

1) The conductor section determined by the laying method and environmental conditions shall not be less than the maximum calculated current of the expected load and the current determined by the protection conditions;

2) The voltage loss of the line should not exceed the national allowable value;

3) The movable conductor should meet the requirements of stability and thermal stability;

4) The minimum traverse section shall meet the mechanical strength requirements, and the traverse section of each phase of the distribution line shall not be less than the cross section specified in Table 1. This is the basic principle of wire and cable section selection. When the wire and cable section is not correctly selected, it will affect the reliable operation of the power supply and distribution system and the service life of the wire and cable, and even endanger the safety.

Qingdao Tianxing Cable Co., Ltd. focus on supporting wire and cable production customization manufacturers, main: exports to more than 40 countries and regions around the world, the annual production capacity of 1 billion yuan. 6000 square meters of storage, standing hundreds of millions of inventory, order demand for rapid distribution and delivery, large prices more favorable. Qingdao cable manufacturer hotline: 16678668098