Before working on a circuit, which safety steps should you take?

Before working on a circuit, which safety steps should you take?

• A. De-energize, verify with a tester, implement lockout/tagout, and wear appropriate PPE.
• B. Lockout/tagout after starting work.
• C. De-energize only.
• D. Verify with tester only.

Answer: (A)

The safety steps you take before working on a circuit should create a safe, non-energized work environment and prevent any accidental re-energizing. Start by de-energizing the circuit to cut off the power supply. Next, verify with a tester that there is no voltage present at the work points, including checking for stored energy in capacitors or other components. Then apply lockout/tagout so the energy sources cannot be turned back on while you’re working, providing a clear and persistent warning to others. Finally, wear appropriate personal protective equipment to protect against possible arc flash, shock, or other hazards that might still be present during the task. This combination is essential because just de-energizing leaves the circuit vulnerable to being re-energized, and simply testing for voltage doesn’t prevent someone from restoring power. Conversely, locking out after you start work or relying on a tester alone does not adequately remove risk. The full sequence—de-energize, verify, lockout/tagout, and PPE—gives the best protection.

The safety steps you take before working on a circuit should create a safe, non-energized work environment and prevent any accidental re-energizing. Start by de-energizing the circuit to cut off the power supply. Next, verify with a tester that there is no voltage present at the work points, including checking for stored energy in capacitors or other components. Then apply lockout/tagout so the energy sources cannot be turned back on while you’re working, providing a clear and persistent warning to others. Finally, wear appropriate personal protective equipment to protect against possible arc flash, shock, or other hazards that might still be present during the task.

This combination is essential because just de-energizing leaves the circuit vulnerable to being re-energized, and simply testing for voltage doesn’t prevent someone from restoring power. Conversely, locking out after you start work or relying on a tester alone does not adequately remove risk. The full sequence—de-energize, verify, lockout/tagout, and PPE—gives the best protection.