Use of single-point grounding for instrumentation and control systems installed in existing generating stations

General guidelines for the design of single-point grounding systems for instrumentation and control (I&C) systems are presented, along with an example illustrating the practical difficulties often involved in trying to implement an ideal theoretical solution. The single-point grounding methods presented should be recognized as an ideal approach that often has practical limitations in implementation. When properly designed and installed, however, a single-point grounding system plays a vital role in the proper operation of modern I&C equipment