What minimum voltage triggers the requirement to place conductors into an ESWC before work?

• A. 120 Volts
• B. 50 Volts
• C. 240 Volts
• D. 600 Volts

Answer: (B)

Establishing an Electrical Safe Work Condition is required whenever work is to be done on or near exposed energized conductors or circuit parts that have voltages of 50 volts or more. This threshold is chosen because the risk of electric shock and arc flash becomes significant at or above 50 V, so the work must be planned with proper de-energization, lockout/tagout, verification, and protective measures. Therefore, the minimum voltage that triggers the ESWC requirement is 50 volts. Higher voltages such as 120, 240, or 600 volts would also require an ESWC, but 50 volts is the cutoff that starts the requirement.