Who should be responsible for putting up the power-off sign?

Power shutdowns and the installation of warning signs should be carried out by an electrician! And it is the electricians involved in the maintenance who carry out the work, because only they know exactly when power needs to be cut off or restored! Moreover, electrical work is a type of special job! Work is prohibited without a special operation qualification certificate!

A thorough analysis of the specific issues is necessary; if it involves repairing electrical equipment, it should be carried out by an electrician. However, in special situations, such as working inside a furnace, the task should be carried out jointly, with the person who enters the furnace keeping the keys, as it is only after that person comes out that it is safe to restore power! The same approach can be applied to other hazardous operations: power disconnection should be carried out by an electrician, who should then attach a padlock; the key should be kept by the person responsible for the maintenance work, which will resolve this dilemma!

Our factory has the Equipment Engineering Department handle it

The power-off tagging should be carried out by an electrician, who must sign the power-off work permit and record the time. Power supply is also carried out by an electrician, with a signature recorded. Operations related to electricity should be carried out by electricians; this is a type of special work that requires a license before one can perform it. If others operate it carelessly, accidents are likely to occur.

It depends on whether an electrician’s license is required; if not, the process can be optimized

Our company has clear regulations requiring that a labeling system be followed for parking and maintenance tasks: the person who carries out the maintenance must place the label. Electricians are responsible for any work involving wiring removal, while equipment maintenance is done by mechanical technicians. Moreover, as long as the relevant departments establish unified rules, there will be no disputes.

It should be the electricians who carry out the work, with support from other specialists. If there is a need to know how long it will take, a written request should be submitted to the electrician team; upon receiving such a request, the team will decide when to cut off and restore power

Thank you to all the poster owners for your valuable suggestions; your opinions have given me support.

Our Haichuan has relevant safety operation procedures. Safety procedures for the power distribution room: 1. The electricians on duty must possess the necessary electrical knowledge, be familiar with the safety operation procedures, and understand the performance and operating methods of various devices in the power supply system and the power distribution room. And it has the capability to take measures in abnormal situations. 2. The duty electrician must have a high sense of responsibility at work, and strictly abide by various regulations such as the duty inspection system, switching operation procedures, work order systems, management systems for safety equipment and fire-fighting devices, as well as access control rules. 3. Personnel permitted to conduct independent inspections of high-voltage equipment and serve as supervisors must be approved by the leader of the power department. 4. Regardless of whether the high-voltage equipment is energized or not, the duty personnel must not remove the barrier alone or step over it to carry out work directly. If it is necessary to move the control panel, a supervisor must be present, and the safety distance required when the equipment is not powered off must be maintained. 5. When it is necessary to inspect outdoor high-voltage equipment during thunderstorm weather, green-edged shoes should be worn, and one must not approach lightning arresters and lightning rods. 6. When inspecting the distribution equipment or entering and leaving the high-voltage room, be sure to lock the door immediately. 7. When contacting the power supply company or the user (the dispatcher) to carry out power outage or restoration operations, the person in charge on duty must verify everything to ensure accuracy, and record the details of the communication as well as the name of the contact person. 8. Power disconnection must be carried out in accordance with the oil switch (or load switch, etc.). Operate the load-side circuit breaker and the busbar-side circuit breaker in sequence. 9. Switching operations on high-voltage equipment and large-capacity low-voltage main panels must be carried out by two persons, with the one who is more familiar with the equipment serving as the supervisor. Oil switches and disconnectors that can be operated remotely or from behind a partition (with interlocking devices connected to the oil switches) can be operated by a single person. 10. Insulating gloves must be worn when closing high-voltage circuit breakers with a pull rod, or when closing high-voltage circuit breakers and oil switches through a transmission mechanism. When operating outdoor high-voltage equipment in rainy weather, insulating boots should be worn. Switching operations are prohibited during thunderstorms. 11. When installing or removing fuses while they are still charged, protective glasses and insulating gloves must be worn; insulating pliers should be used if necessary, and one should stand on an insulating mat. 12. After the power is cut off to electrical equipment, it should be treated as if it is still under voltage until the circuit breaker is disconnected and appropriate safety measures are taken; do not touch the equipment or enter the enclosure to prevent sudden power restoration. 13. When power outage is required for construction or maintenance work, the duty personnel must take the necessary safety measures as specified in the work order, including shutting off the power, checking for electricity, setting up barriers, and hanging warning signs. They shall jointly inspect the site with the person in charge of the work to confirm that there is no electricity present, and inform them of the locations of nearby live equipment as well as any precautions to be taken. Only after both parties have issued the permission to start work can the work begin. 14. At the end of the work, the staff members leave the site. The person in charge of the work explains everything to the person on duty, and together they conduct a check. Only after both parties have signed the work completion form can the person on duty remove the safety measures and restore power supply. Before completing the work completion procedures, the duty personnel are not allowed to turn on the power to the construction equipment. 15. When high-voltage equipment is shut down for maintenance, the power must be cut off if the distance to the area where the workers are carrying out their normal activities is less than 0.35 meters. For equipment with a distance greater than 0.35 meters but less than 0.7 meters, a secure temporary barrier must be installed at a distance of not less than 0.35 meters from the live parts; otherwise, the power supply must be disconnected. The power supply must also be cut off if there are no reliable measures to protect the live parts behind or on either side of the workers. 16. In the event of a power outage, the power supply that could feed electricity to each circuit must be cut off. It is not sufficient to simply turn off the oil switch to carry out work; the circuit breaker must also be turned off to ensure that there is at least one clear disconnection point for each circuit. The transformer and voltage transformer must be disconnected from both the high-voltage and low-voltage sides. The primary and secondary fuses of the voltage transformer must be removed. The operating power supply of the oil switch must be disconnected. The operating handle of the knife switch must be locked. 17. When testing for voltage, a voltage tester of the appropriate rating and in good condition must be used, and voltage testing should be performed on both sides of the outlet when maintaining equipment. Before testing for electricity, it is necessary to first test it on a device that is powered on to confirm that the voltage tester is in good condition. Insulated gloves must be worn when testing high-voltage equipment for electricity. 18. Once it is confirmed that the equipment has no voltage, the conductors of the equipment under maintenance should be grounded immediately and short-circuited to each other. Grounding wires must be installed at all locations where power may be supplied to the equipment that is offline, as well as in those areas where induced voltage may occur. The grounding wire should be made of multi-strand bare soft copper wire, with a cross-sectional area of not less than 25 square millimeters. The ground wire must be fixed to the conductor using special clamps, and the sequence for removal is the reverse. Insulated gloves should be used when installing and removing grounding wires. The installation and removal work must be carried out by two people. Maintenance personnel are not allowed to install, remove, or modify the grounding wire on their own. The grounding wires should be numbered and placed in a fixed location. Records should be kept for the installation and removal of grounding wires, and these details must be clearly communicated during shift handovers. 19. When working on the capacitor circuit, the capacitors must be discharged one by one. Ground after discharge. 20. On switches and disconnectors that can be energized as soon as they are closed, a sign reading “Do not close – people are working” should be hung on their operation handles. Signs reading “Stop, High Voltage Hazard” are hung on the barriers surrounding the live electrical equipment on both sides and opposite the work area, as well as on the pathways where access is prohibited. 21. When a power outage is required for line or user maintenance, the duty officer shall take safety measures, then notify the relevant person in charge to begin the work and make a record of it. Power supply can only be restored after receiving notification from the original supervisor once the work is completed. Scheduled power outages and restorations are strictly prohibited. 22. When working near live equipment, a dedicated supervisor must be assigned. Live equipment can only be handled in front of or to the side of the workers; otherwise, the power must be turned off. 23. When performing maintenance on the low-voltage circuit, the power supply should be disconnected and the fuse removed. Hang a sign that reads “Do not close – work in progress” on the switch operating handle. 24. When low-voltage equipment is in operation under voltage, a dedicated person should be assigned to supervise it. At work, one must wear a work hat, long-sleeved clothing, insulating gloves, use tools with insulated handles, and work on dry insulating surfaces. Adjacent live parts should be separated by insulating sheet material. The use of files, metal rulers, brushes with metal parts, and dusting brushes is strictly prohibited. 25. When working on the secondary circuit of a live current transformer, be sure to prevent high voltages from arising due to an open circuit on the secondary side of the current transformer. When breaking the current circuit, a short circuit must be created using a shorting wire at the dedicated terminal on the secondary side of the current transformer. Winding with wires is strictly prohibited. The permanent ground connection of the circuit must not be disconnected during operation. There must be a dedicated person to supervise the work, insulated tools must be used, and one must stand on an insulating mat. 26. In the event of electric shock or fire accidents, the duty personnel should immediately cut off the power supply to the relevant equipment without waiting for instructions, in order to carry out rescue efforts. 27. In the event of a fire involving electrical equipment, carbon tetrachloride, carbon dioxide extinguishers, or 1211 extinguishers should be used to put out the fire.

For the power shutdown for maintenance of operating equipment, an electrician (electrical inspector) shall perform the power shutdown; the electrician and the operator on duty shall jointly attach warning signs and sign to confirm it, and they shall also remove the signs together after the maintenance is completed.