An electrical service mast that extends more than what height above the roof surface should be separately supported?

An electrical service mast that extends more than 5 feet above the roof surface must be separately supported to ensure stability and safety. The reason for this requirement is to prevent excessive movement or flexing of the conduit and wiring, which can occur due to wind or other environmental factors.

When a mast extends too high without additional support, it becomes vulnerable to stress that can lead to damage or disconnections at junctions or terminations. This height restriction serves as a guideline to maintain the integrity of the electrical service installation, ensuring that all components remain securely in place and function safely over time.

Understanding this aspect of electrical installation safety highlights the importance of adhering to these regulations to protect both the electrical system and the structure itself from potential hazards associated with improper support.