How much space should be maintained for a voltage of 15.1kV - 36kV?

For a voltage range of 15.1 kV to 36 kV, it is crucial to maintain a safe amount of clearance between the power lines and any nearby structures, trees, or individuals to ensure safety and prevent electrical hazards. The appropriate clearance distances are based on national safety standards and guidelines, which take into account the potential for electric arcs and the risk of accidental contact.

Maintaining a distance of 3 feet 6 inches is aligned with industry standards for the specified voltage range. This distance not only protects workers and the public but also safeguards the infrastructure around high-voltage lines from damage due to electrical arcing or overvoltage incidents.

The other choices do not meet the recommended safety clearance for this voltage range, which is why they are not suitable. Having insufficient clearance could lead to increased risks, making it essential to follow established guidelines for safe spacing in electrical work.