Grounding electrodes for lightning protection should be connected to grounding electrodes for the electric power and communications systems. What is the guideline?

The guideline regarding the grounding of electrodes for lightning protection being connected to the grounding electrodes for electric power and communications systems is that they should be connected. This recommendation is based on the principle of achieving a common ground potential, which helps to ensure that both systems dissipate electrical energy safely into the ground during a lightning strike or fault event.

Connecting these grounding systems helps to minimize voltage differences between the systems. When a lightning strike occurs, the induced surge can affect multiple systems within proximity; having a common ground helps in maintaining a stable voltage environment and protects sensitive electronic equipment from damage.

Additionally, within electrical safety standards and guidelines, these connections help ensure that protective measures taken for lightning are also applied consistently across all electrical installations, thus contributing to the overall reliability and safety of the systems involved. This reflects best practices in grounding and bonding for safety and efficacy, emphasizing the importance of a unified grounding approach in both lightning protection and general electrical system grounding.

In contrast, other options suggest varying degrees of obligation. Indicating that these connections should not be made or that they are optional would undermine the effectiveness of grounding practices designed to safeguard against electrical surges and enhance system performance.