The voltage is the most significant factor, but several other variables can increase the required safe working clearance for a 66kV line. These include:

• Environmental Conditions: High humidity, fog, or rain can increase the risk of an electrical arc, necessitating a larger safety clearance. Strong winds can also cause conductors to sway, which must be accounted for when planning a safe work zone.

• Insulation Type: Whether a line is bare or uses a specific type of covered conductor can affect safety protocols, but for 66kV, the primary concern is the live line itself.

• Work Method: The type of work being performed—whether it's on the ground, using an elevated work platform, or live-line work with specialized tools—dictates the specific safe clearance protocols that must be followed.

Because these factors are dynamic, the working clearance should always be considered the absolute minimum, and a safety margin should always be applied.