Before removing or replacing fuses, what must be done to electrical circuits?

Before removing or replacing fuses, what must be done to electrical circuits?

• A. De-Energized
• B. Decommissioned and locked out
• C. Grounded
• D. Tagged out

Answer: (A)

Safely servicing electrical circuits starts with removing all energy from the circuit. Before you remove or replace a fuse, you must de-energize the circuit so there is no voltage present and no stored energy that could shock you or cause an arc flash. Grounding the circuit isn’t the action needed here to make a fuse change safe, and simply tagging out doesn’t physically prevent the circuit from being energized again. Decommissioning implies taking the circuit out of service for good, which isn’t appropriate for routine maintenance. In practice, you would de-energize the circuit and then follow lockout/tagout procedures to ensure it cannot be re-energized while you work.

Safely servicing electrical circuits starts with removing all energy from the circuit. Before you remove or replace a fuse, you must de-energize the circuit so there is no voltage present and no stored energy that could shock you or cause an arc flash. Grounding the circuit isn’t the action needed here to make a fuse change safe, and simply tagging out doesn’t physically prevent the circuit from being energized again. Decommissioning implies taking the circuit out of service for good, which isn’t appropriate for routine maintenance. In practice, you would de-energize the circuit and then follow lockout/tagout procedures to ensure it cannot be re-energized while you work.