An electrical panel needs maintenance work. After de-energizing the circuit, what is the next required step in the lockout/tagout procedure?
Correct Answer
B) Test the circuit to verify it is de-energized
After de-energizing, the circuit must be tested with properly rated test equipment to verify it is actually de-energized before applying locks and tags. This verification step is critical for worker safety.
Why This Is the Correct Answer
Testing to verify de-energization is the critical second step in lockout/tagout procedures because electrical switches and breakers can fail, and circuits may still be energized even after attempting to shut them off. Using properly rated test equipment (like a voltmeter) confirms that no electrical energy is present before workers proceed with applying locks and tags. This verification step prevents electrocution and is mandated by OSHA standards as an essential safety measure.
Why the Other Options Are Wrong
Option A: Apply personal locks and tags
While notifying workers is important for overall safety, it is not the immediate next step in the lockout/tagout sequence. The priority is verifying the circuit is actually de-energized through proper testing.
Option D: Notify all workers in the area
Beginning work immediately after de-energizing is extremely dangerous and violates lockout/tagout procedures. The circuit must be tested for verification and then properly locked out before any work begins.
Memory Technique
Think 'Don't Trust, Verify' - never trust that a circuit is dead just because you flipped a switch. Always test with proper equipment to verify before proceeding.
Reference Hint
OSHA 29 CFR 1926.417 - Lockout and Tagging of Circuits, or Florida Building Code Chapter 27 - Electrical Safety Requirements
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