According to the highest temperature should not be allowed by the wire core, cooling condition, to determine the condition of laying, carrying capacity under different conditions are completely different.
Can be calculated according to aluminium and copper core cable cross section carrying capacity.
Can also be calculated according to the current cable copper aluminum conductor cross-sectional area.
1. the ambient temperature
Adopted by the environment temperature is to consider the cables or conductors without load when the temperature of the surrounding media.
2. soil thermal resistance rate
For cable buried in the ground, in the actual soil thermal resistance rate is higher than 2.5, K.m/W must be appropriate to reduce the carrying capacity or close to the soil around the cable to a suitable material to replace.
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3. multi loop group
Group, install more wire or cable must be multiplied by the correction factor. Group correction coefficient of each circuit is to assume that the group cable load calculated on the basis of the same.
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