If the communication system's point of entrance is greater than how far away from the electric power service entrance, what must be installed?

When determining the necessary distance between the communication system's point of entrance and the electric power service entrance, the guideline specifies that if the distance exceeds 20 feet, certain protective measures need to be implemented. This requirement is derived from safety standards aimed at preventing lightning-induced surges from affecting sensitive communication equipment.

If the entry point of the communication system is more than 20 feet away from the electric power service entrance, installing appropriate surge protection devices is essential to safeguard the system. This spacing helps reduce the risk of voltage differentials that could arise from lightning strikes, ensuring the integrity of the communication infrastructure is maintained.

Protective measures include surge arresters and grounding practices that are part of a comprehensive lightning protection strategy. By adhering to the 20-foot rule, organizations can mitigate the risk of equipment damage, data loss, and operational downtime associated with electrical surges.