A lockout tag must be placed on any circuit part operating at how many volts or more prior to working on or near these parts?

A lockout tag must be placed on any circuit part operating at how many volts or more prior to working on or near these parts?

• A. 50
• B. 25
• C. 100
• D. 120

Answer: (A)

Lockout/tagout is about preventing unexpected energization of equipment while you work. When a circuit part operates at 50 volts or more, there is a real risk of electric shock or arc flash. Before you touch or work near those parts, you must isolate the energy source and apply a lock and tag to the disconnect so that no one can re-energize the circuit while you’re working. This ensures you have control over the energy that could otherwise harm you. If the circuit is below 50 volts, the formal lockout requirement isn’t triggered by voltage alone, though you still follow safe work practices and take precautions as needed. Therefore, 50 volts is the threshold that requires lockout/tagout in this context.

Lockout/tagout is about preventing unexpected energization of equipment while you work. When a circuit part operates at 50 volts or more, there is a real risk of electric shock or arc flash. Before you touch or work near those parts, you must isolate the energy source and apply a lock and tag to the disconnect so that no one can re-energize the circuit while you’re working. This ensures you have control over the energy that could otherwise harm you. If the circuit is below 50 volts, the formal lockout requirement isn’t triggered by voltage alone, though you still follow safe work practices and take precautions as needed. Therefore, 50 volts is the threshold that requires lockout/tagout in this context.