In what conditions can electricians work on energized circuits?

Electricians can work on energized circuits only when they are properly trained and have appropriate protective measures in place because this ensures their safety and the safety of others. Working on live electrical circuits poses significant risks, including electric shock, burns, and electrical fires.

Proper training equips electricians with the knowledge to identify hazards, handle equipment safely, and use personal protective equipment (PPE) to minimize risks. The protective measures can include insulated tools, gloves, face shields, and various other safety gear designed to protect against electrical hazards.

This practice is also in alignment with industry standards and regulatory requirements, such as those outlined in the National Electrical Code (NEC) and occupational safety guidelines, which mandate careful consideration of safety when working with energized components. These measures are critical to prevent accidents and ensure that electricians can perform their work safely, effectively, and legally.

In contrast, the other choices present scenarios that do not adhere to the established safety standards. For example, working on energized circuits "whenever necessary" does not account for safety protocols, while allowing work "during emergencies only" or "as long as a supervisor is present" might imply a lack of necessary training or protective measures.