适用于同轴电缆。它规定了几种测试方法来确定: -电介质的热流阻力(电介质对由内部导体在高温下施加的径向应力引起的机械变形的阻力)； -耐热暴露(以前称为“耐热冲击性”:电介质或护套对高温的电阻)； -半刚性电缆的热行为(半刚性电缆的电缆结构在高温下承受电介质膨胀的能力)； -尺寸稳定性(电缆元件相对于彼此的位移，以证明电缆与连接器一起使用的适用性)。

Applies to coaxial communication cables. It specifies several test methods for determining:
- heat flow resistance of dielectric (the resistance of the dielectric to the mechanical distortion induced by radial stress imposed by the inner conductor at high temperatures);
- resistance to heat exposure (formerly "heat shock resistance": the resistance of the dielectric or the sheath to high temperatures);
- heat behaviour of semi-rigid cables (the ability of the cable construction of semi-rigid cables to withstand the expansion of the dielectric at high temperature);
- dimensional stability (the displacement of the cable elements with respect to each other in order to demonstrate the suitability of a cable for use with connectors).