China bed elevator supplier Introduce the selection of wire and cable model and specifications (conductor cross-section) when selecting wire and cable.
⒈ Selection of wire and cable models
When selecting wire and cable, consider the use, laying conditions, and safety; for example, according to different uses, you can choose power cables, overhead insulated cables, control cables, etc. according to different laying conditions, you can choose general plastic insulated cables, steel tape Armored cable, steel wire armored cable, anti-corrosion cable, etc .; according to safety requirements, non-extendable cable, flame retardant cable, halogen-free flame retardant cable, fire-resistant cable, etc. can be selected.
⒉ Selection of wire and cable specifications
When determining the specification of wire and cable (conductor cross-section), the selection conditions such as heat generation, voltage loss, economic current density, and mechanical strength should be generally considered. According to experience, the low-voltage power line has a large load current, so it is generally selected according to the heating conditions, and then the voltage loss and mechanical strength are checked; the low-voltage lighting line has a higher voltage level, and the voltage loss can be adjusted according to the allowable voltage loss condition. Select the cross-section, and then check the heating conditions and mechanical strength; for high-voltage lines, first, select the cross-section according to the economic current density, and then check the heating conditions and allowable voltage losses; and the high-voltage overhead lines should also check the mechanical strength. If the user has no experience, the relevant professional unit or person should be consulted.