What is the minimum vertical clearance required for communications cables on a roof with a slope of 4 in. in 12 in.?

In determining the minimum vertical clearance required for communications cables on a sloped roof, it’s essential to refer to established safety codes and standards, which often dictate these specifications based on the slope's steepness and its potential risks.

For a roof with a slope of 4 inches in 12 inches, commonly known as a 4:12 slope, the regulations typically require a minimum clearance of 3 feet for communications cables to ensure safety and compliance. This clearance is necessary to prevent potential hazards, such as accidental contact with the cables, which could lead to interference or damage. Additionally, it aims to accommodate any type of maintenance activities on the roof without putting workers at risk.

The 3-foot clearance aligns with safety guidelines that consider how cables might sag over time or how they might be affected by environmental factors, ensuring that they remain clear of areas that may experience activity or movement.

Therefore, the choice stating a requirement of 3 feet is the correct answer, reflecting a standard that prioritizes safety and operational functionality for installations on sloped roofs.