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Factors Affecting the Ampacity of Cables

What are the factors affecting the current carrying capacity of cables in the process of power supply and transmission, industrial and commercial power consumption?

1. Ambient Temperature

The higher the ambient temperature, the lower the cable carrying capacity. There are many factors that affect the ambient temperature, such as ventilation effect, sunshine conditions, cable density, etc., and the above factors will further affect the ampacity of the cable.

2. Density of Cables Laying

cable ampacity

Excessive temperature will result if cables are laid too closely. In addition, when multiple cables are laid side by side, the proximity effect and skin effect will be formed, so that the charge will be concentrated in the section of the cable, thereby reducing the allowable carrying capacity of the cable.

3. Cable Length

The longer the cable, the lower the ampacity.