电线电缆拉线设备型式尺寸起草人

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GB/T12706-2008 电缆假定直径的计算公式 1、 导体假定直径 dL 不考虑形状和紧压程度如何，每一标称截面积导体的假定直径（ dL）由下表 给出： 导体截面 mm2 dL/mm 导体截面 mm2 dL/mm 导体截面 mm2 dL/mm 导体截面 mm2 dL/mm 1.5 1.4 25 5.6 150 13.8 630 28.3 2.5 1.8 35 6.7 185 15.3 800 31.9 4 2.3 50 8.0 240 17.5 1000 35.7 6 2.8 70 9.4 300 19.5 1200 39.1 10 3.6 95 11.0 400 22.6 1400 42.2 16 4.5 120 12.4 500 25.2 1600 45.1 2、绝缘线芯假定直径 DC * 无半导电屏蔽的电缆线芯： DC= d L+2t i