An overhead service conductor shall have a minimum clearance above a 3:12 roof of what measurement?

The minimum clearance requirement for overhead service conductors above a sloped roof, such as a 3:12 roof, is established to ensure safety and proper operation. A clearance of 12 feet is specified to prevent risks of electrical hazards, such as accidental contact with the conductors, and to allow for safe access for maintenance and other activities.

This clearance is essential not only for human safety when rooftops are accessed but also to protect the integrity of the electrical system, considering potential movement of the roof or equipment above it. The specification ensures that conductors are safely elevated above reachable areas while accommodating the slope of the roof, which poses unique considerations compared to flat roofs or different types of structures.

The other choices do not meet the specific safety regulations for a 3:12 roof slope, as they provide either too little clearance or are unnecessarily strict. Ensuring compliance with regulations related to these measurements is crucial for maintaining safety standards in electrical installations.