What is the minimum clearance required between the power's secondary conductor and the fiber-optic cable in a cable span?

The minimum clearance required between a power's secondary conductor and a fiber-optic cable in a cable span is crucial for ensuring safety and maintaining the integrity of the fiber-optic transmission. A spacing of 30 inches allows for adequate physical separation, which is necessary to reduce the risk of electrical interference and potential damage that could arise if the two cables were to come into contact or if there was any electrical fault.

Fiber-optic cables are often sensitive to electromagnetic interference, which can be caused by nearby power conductors. Hence, maintaining this minimum distance is important not only for the safety of the installation but also for the optimal performance of the fiber-optic system.

This standard is typically derived from safety codes and industry best practices that take into account various factors, including environmental conditions, installation scenarios, and the operating voltages of the nearby power lines. The specified 30 inches strikes a balance between safety regulations and practical installation considerations, making it the appropriate choice in this context.