标准摘要
[中文适用范围]： 描述了一种适用于任何类型的水平运行的电缆和组的方法，前提是电缆具有相同的直径并且发出相同的损耗。所提供的信息仅限于以下情况： 方形结构中最多有九根电缆 [外文原描述]： Is applicable to any type of cable and group running horizontally, provided that the cables are of equal diameter and emit equal losses. This publication supersedes IEC 61042.
英文名称Electric cables - Calculation of the current rating - Part 2: Thermal resistance - Section 2: A method for calculating reduction factors for groups of cables in free air, protected from solar radiation