Should the Earthing and grounding System of PLC or Communication Rooms in High Voltage / Transmission Substations be electrically seperated from other parts of the Substation? Please reference the standards.We see in your original question that you

HOW NOT TO GROUND! Do not ground various elements of the IACS i.e., shields from field transmitters and the ROC/PLC power supply ground, to different earthing. Figure 9 shows a prime example of how not to ground. In this example, the control loop sh

TYPES OF EARTHING Any discussion on earthing invariably leads to a discussion on the different types of earthing and the corresponding definition of each. However, it is commonly accepted that earthing in the gas industry can be classified as either