本推荐规程涉及电力和有线通信系统附近存在的感应环境，以及由此产生的干扰效应；为控制或修改环境以及受影响系统的敏感性提供指导，以保持可接受的干扰水平。可接受水平是指不会造成人员或公共安全危害、电缆或设备损坏和/或电路退化或故障的稳态或浪涌诱导的纵向电压或电流量。为了帮助用户计算电力线和电信线之间的感应，开发了接口的概念。 本推荐做法允许任何一方在不需要另一方参与的情况下，通过使用探测线验证接口处的感应。本推荐规程不适用于铁路信号电路。

This recommended practice addresses the inductive environment that exists in the vicinity of electric power and wire-line telecommunications systems and the interfering effect that may be produced thereeby; guidance is offered for the control or modification of the environment and the susceptibility of the affected systems in order to maintain an acceptable level of interference. An acceptable level is defined as an amount of steady-state or surge induced longitudinal voltage or current that does not cause a personnel or public safety hazard, damage to cable or equipment, and/or circuit degradation or failure. To aid the user of this recommended practice in calculating induction between power and telecommunication lines, the concept of an interface is developed. This recommended practice permits either party, without need to involve the other, to verify the induction at the interface by use of a probe wire. This recommended practice does not apply to railway signal circuits.