Which measurement steps verify a circuit is de-energized? (Select the most complete option)

• A. Check your meter on a known live source
• B. Check your circuit - phase to phase and phase to ground
• C. Check your meter again
• D. All of the above

Answer: (D)

To truly confirm a circuit is de-energized, you need a complete, multi-step check that covers both the tool and the circuit. Start by verifying the meter itself is working correctly—test it on a known live source. If the meter isn’t reading properly, any reading on the circuit could be misleading, even if the circuit seems to be off.

Next, check the circuit with appropriate voltage measurements. Depending on the system, that means looking for voltage between conductors (phase-to-phase) and between a conductor and ground (phase-to-ground). This helps catch any energized condition that might not be evident with a single test point or reference, including potential differences that could survive in certain configurations or fault conditions.

Finally, re-check the meter and possibly re-test the circuit to confirm the reading remains consistent. This re-check helps catch any drift, instrument error, or transient residual energy (such as stored energy in capacitors) that could re-energize the circuit.

By combining a working-tool check, comprehensive circuit testing, and a re-test, you ensure the safest and most reliable confirmation that the circuit is de-energized.