What are the general principles of wire and cable selection?

First, what are the general principles of wire and cable selection? In the selection of wire and cable, generally pay attention to the selection of wire and cable models, specifications (conductor cross-section).1. Wire and cable model selection selection of wire and cable, take into account the use, laying conditions; for example, according to the use of different, optional power cables, overhead insulated cables, control cables, etc.; according to the laying conditions of the different, optional general plastic-insulated cables, steel armored cables, steel wire armor cable, corrosion-resistant cables, etc.; according to market requirements, non-flammable cables, flame retardant cables, halogen-free flame retardant cables, fire-resistant cables, etc. 2.Wire and cable selection of general principles? Anti-corrosion cables, etc.; according to market requirements, the choice of non-flammable cables, flame retardant cables, halogen-free flame retardant cables, fire-resistant cables, etc. 2. 2. Wire and cable specifications to determine the use of wire and cable specifications (conductor cross-section), should generally take into account the heat, voltage loss, the economic current density, mechanical strength and other selection conditions. According to experience, low-voltage power line because of its load current is large, it is generally first according to the heat conditions to select the cross-section, and then calculate the voltage loss and mechanical strength; low-voltage lighting line because of its high voltage level requirements, can be first according to the conditions of the permissible voltage loss to select the cross-section, and then calculate the heat conditions and mechanical strength. For high-voltage lines, select the cross-section according to the economic current density first, and then calculate the heat conditions and allowable voltage loss; and high-voltage overhead lines, should also be calculated its mechanical strength. If the user does not have experience, the relevant units or people should be consulted.

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