In electrical installations, what role does the ruling span play?

The ruling span is crucial in electrical installations as it particularly addresses the behavior of conductors between support points. It refers to the distance between two consecutive points of support for overhead conductors. Understanding the ruling span is vital because it directly affects how the conductors are installed, including considerations for sagging.

When conductors are installed along a span, environmental factors like temperature and wind can lead to sagging. The ruling span helps in determining the maximum sag permissible, ensuring that the integrity and safety of the electrical installation are maintained. By properly accounting for this span, engineers can ensure that there is adequate clearance above ground and other structures, preventing accidental contact and ensuring reliable performance while mitigating risks associated with conductor sagging under various conditions.

The other options do not directly relate to what the ruling span specifically addresses in the context of electrical installations.