What vertical distance must overhead service conductors maintain above the roof surface unless stated otherwise by exception?

Overhead service conductors must maintain a vertical distance of 8 feet 6 inches above the roof surface unless specified otherwise by exception. This requirement is outlined in the National Electrical Code (NEC) to ensure safety and accessibility. The 8 feet 6 inches clearance protects both the electrical conductors and individuals on the roof, reducing the risk of accidental contact with the conductors.

This height is especially important in residential and commercial settings where maintenance is performed on roofs. Ensuring that the conductors are adequately elevated helps prevent hazards related to electrical shock and damage to the electrical system. The NEC aims to establish minimum clearances that promote safe conditions for both the public and maintenance personnel.

While there are other height requirements noted in the NEC for different scenarios, the standard for overhead service conductors above the roof is specifically set at 8 feet 6 inches, making it crucial for compliance with safety regulations.