Before closing a breaker to re-energize a line, which checks should be verified?

• A. Only protection settings verified
• B. Clearance around the line, interlocks satisfied, protection settings verified, and clear communication with personnel
• C. Only clearance around the line verified
• D. Only interlocks satisfied

Answer: (B)

Re-energizing a line safely requires confirming four things before closing the breaker: safe clearance around the line, satisfaction of all interlocks, verified protection settings, and clear communication with all personnel. Safe clearance protects people and nearby equipment from arc flash and accidental contact. Interlocks being satisfied ensures mechanical and safety protections are in the proper state so the breaker can be closed only when conditions are safe. Verified protection settings mean the protection relays and devices are configured correctly to trip if a fault occurs, preventing undetected faults from staying energized. Clear communication ensures everyone involved knows the operation is happening, where the line is, and where they should be, eliminating surprises.

Relying on any single factor leaves a gap that could lead to injuries or equipment damage, which is why all four checks are essential together.