本推荐规程描述了如何确定7A的可靠性？工业和商业设施中的24个连续电力系统。首先介绍了用概率方法进行可靠性分析的方法。接下来讨论如何评估结果，以及如何实施变更，以确保达到预期的可靠性程度。

This recommended practice describes how to determine the reliability of 7×24 continuous power systems in industrial and commercial facilities. The method of reliability analysis by probability methods is described first. This is followed by a discussion of how to evaluate the results and how to implement changes to ensure that the expected degree of reliability is achieved.