1) Before any maintenance work begins, ensure that the power switch of the preceding circuit is turned off and a "Power Off" warning sign is properly displayed. Use an electric tester to confirm that the equipment being repaired is completely de-energized before proceeding with the repair.
2) Always have at least two people present during the maintenance process—one person performing the task and another acting as a safety supervisor to monitor the work and assist if needed.
3) Only qualified and trained electricians who are familiar with the power distribution system should perform electrical maintenance. Unauthorized personnel must not handle any electrical components.
4) All maintenance personnel must wear appropriate personal protective equipment (PPE), such as insulated gloves, safety goggles, and non-conductive footwear. Use only certified insulation tools when working on live or potentially live circuits.
5) When replacing electrical components, always use parts that match the original specifications. Never substitute with unapproved or inferior-quality components that could compromise safety or performance.
6) During the maintenance process, do not alter the original wiring configuration of the distribution system. Avoid removing or modifying existing switches or electrical devices unless specifically instructed by a qualified engineer or supervisor.
7) After completing the maintenance, disconnect the power supply from the distribution device. Then, gradually restore power starting from the source side. Once all connections are confirmed to be secure, use a voltage detector to verify that power has been restored safely before reactivating the system.
8) At the conclusion of the maintenance, remove the "Power Off" sign from the upper-level power switch and replace it with a "Power On" sign to indicate that the system is now operational.
It is essential to follow these procedures strictly to ensure the safety of both the personnel and the electrical system. Regular training and updates on safety protocols should also be conducted to maintain a high level of awareness and preparedness.
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