Scout's Toolbox Talks

Never assume a circuit is de-energized just because the breaker is off. OSHA 1910.333(b)(2)(iv) requires that you test for absence of voltage before working.
Testing is the most critical — and often overlooked — step in electrical LOTO procedures.

Why It Matters:
Many electrical fatalities have occurred because someone thought the circuit was off. A mislabeled breaker, a backfed circuit, or a faulty disconnect can still carry deadly voltage. Testing confirms the system is truly safe to touch.

Key Points:

• Use an appropriately rated voltage tester for the system voltage (e.g., CAT III for panels).
• Verify your tester on a known live circuit first — this ensures your tester is functioning.
• Test all conductors — hot, neutral, and ground — for voltage.
• Always wear proper PPE (rubber gloves, arc-rated clothing) while testing.
• Document your results when required by your company or site policy.
• If there’s any uncertainty, stop and get verification.

✅ If you don’t test, you’re working blind.

Ask the Crew:

• Did we test for voltage on every conductor?
• Do we know our meter is accurate and functioning?

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