In which scenario is primary electrical protection required on network-powered broadband communications conductors?

Primary electrical protection is essential for network-powered broadband communications conductors that are not grounded or interrupted because these conditions increase the risk of damage to the equipment and potential safety hazards. Grounding provides a pathway for excess electricity to safely dissipate into the earth, while an uninterrupted circuit ensures that there are no weak points where surges could enter the system.

In situations where the conductors are not grounded, they are vulnerable to electrical surges caused by lightning strikes or other environmental factors, which can lead to equipment failure or fire hazards. The same applies to interrupted connections where the integrity of the grounding system could be compromised, leading to similar risks. Therefore, implementing primary electrical protection ensures that the system remains safe and functional, safeguarding both the equipment and the users.

The other scenarios mentioned do not inherently necessitate primary electrical protection. For instance, above-ground conductors may still have adequate protection if they are properly grounded, and stormy weather does not automatically imply a need for protection unless the grounding condition is also a factor. Likewise, while underground connections may face different threats, primary protection is not exclusively required for them compared to ungrounded systems.