For voltages over 50 kV, how much does the minimum required high-voltage power line clearance increase for every 150 kV?

The minimum required high-voltage power line clearance increases by 5 feet for every additional 150 kV when the voltage exceeds 50 kV. This requirement is based on safety standards that aim to prevent electrical accidents and ensure adequate separation between power lines and any structures or objects that may pose a contact hazard.

The rationale for this clearance is rooted in the need to manage the risk associated with high-voltage electricity. Higher voltages create stronger electric fields, which can increase the likelihood of arcing or electrical discharge. By establishing specific clearance requirements, safety protocols help to minimize these risks, ensuring that individuals and structures near high-voltage lines maintain a safe distance.

Understanding these clearance requirements is particularly important for those involved in the planning, installation, and maintenance of electric utility infrastructure, as well as for ensuring compliance with federal and state regulations regarding electrical safety.