Give a concise sequence for safely re‑energizing an EV after maintenance.

• A. Remove lockout devices only by the person who applied them.
• B. Clear tools and personnel, reconnect components per OEM, re‑energize the HV system, and verify operation.
• C. Re‑energize the HV system before removing lockout.
• D. Remove lockout devices only by the person who applied them, clear tools and personnel, reconnect components per OEM, re‑energize the HV system, and verify proper operation with OEM checks.

Answer: (D)

Ensuring a safe return to service after maintenance relies on a controlled lockout/tagout and re‑energization sequence. Only the person who applied the lockout should remove it, so the isolation remains secure and no one re-energizes the system prematurely. After that, clear tools and personnel from the area to ensure there are no hazards present when power is restored. Reconnect components according to the OEM’s procedures to restore the system with correct connections and sequencing. Then re‑energize the high‑voltage system only after the area is clear and the equipment is properly reassembled. Finally, verify proper operation with OEM checks to confirm everything functions safely. This order minimizes risk by keeping the lockout control with the original author, ensuring a safe, verified re‑energization.