The two-employee rule applies when lines are energized at or above which voltage?

• A. 120 V
• B. 240 V
• C. 600 V
• D. 13,800 V

Answer: (C)

Two people present is a safety approach used for work on or near energized lines to ensure immediate help, better communication, and quick action if something goes wrong. This rule is applied when lines are energized at or above six hundred volts because the hazards rise with voltage—arc flash energy, shock risk, and the potential for a dangerous situation escalate, so having a second qualified worker nearby helps monitor the situation, enforce safe clearances, assist with de-energizing if needed, and provide rescue if an incident occurs. At voltages below six hundred volts, the risk is lower and different safe-work practices and PPE are used, but the explicit two-person requirement is typically defined starting at six hundred volts.