Which safety procedure should be followed before working on a circuit?

Before working on a circuit, it is critical to check if the circuit is energized. This procedure ensures that the worker is aware of the current status of the circuit before proceeding with any work. Failing to confirm whether a circuit is live can lead to severe electrical hazards, including shock or equipment damage.

By actively checking for energy in the circuit, linemen can take the necessary precautions, such as de-energizing the circuit or using appropriate protective equipment, to ensure their safety and the safety of others in the area. This step is fundamental in practicing safe work protocols in the electrical field, reinforcing that assumption about the circuit's status is not a reliable or safe practice.