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Selection Principle Of Cable

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Update time : 2020-10-13 10:08:40

In the selection of wire and cable, generally pay attention to the wire and cable type, specification (conductor section) selection.

⒈ Wire and Cable model selection

When selecting wire and cable, consider the use, laying conditions and safety; for example:

According to the different use, can choose power cable, aerial insulated cable, control cable, etc.

According to the different laying conditions, can choose general plastic insulated cable, rubber insulated cable, steel tape armored cable, steel wire armored cable, anti-corrosion cable, etc.

According to the safety requirements, can choose flame-retardant cable, halogen-free flame-retardant cable, fire-resistant cable.

⒉ Wire and Cable specifications selection

To determine the use of wire and cable specifications (conductor cross-section), the general should consider the heating, voltage loss, economic current density, mechanical strength and other selection conditions. According to experience, the low-voltage power line due to its large load current, it is generally first select section according to the heating conditions, and then check its voltage loss and mechanical strength; low-voltage lighting line because of its high voltage requirements, you can first select the section according to the allowable voltage loss conditions, and then check the heating conditions and mechanical strength; Then select the section according to the economic current density, then check its heating conditions and allowable voltage loss, and high-voltage overhead line, also fulfilled its mechanical strength. If the user has no experience, the relevant professional unit or person should be consulted.