Maintaining a distance of 10 feet from power lines is important to prevent which of the following?

Maintaining a distance of 10 feet from power lines is crucial primarily to prevent electrical hazards. When operating aerial fire apparatus near power lines, there is a significant risk of electrical shock or electrocution if the apparatus or any equipment comes into contact with live power lines. High-voltage electricity can arc, creating a dangerous situation for firefighters and anyone in the vicinity. By adhering to this safety distance, firefighters ensure they are safe from these potential electrical hazards, allowing them to focus on their operations without the added risk of electrical incidents.

In the context of the other options, while uncontrolled fire spread, obstruction to visibility, and inability to reach the structure are valid concerns in firefighting, they are not the primary reasons for maintaining a safe distance from power lines. Fire spread is more related to the management of combustible materials and current firefighting techniques, visibility can be addressed by other means, and accessibility is typically managed through adequate planning and positioning of the fire apparatus. The emphasis on electrical hazards highlights the unique dangers posed by proximity to power lines and underscores the importance of stringent safety practices in firefighting operations.