GB 50054-95 "Low Voltage Power Distribution Design Code" Article 3.3.7 The doors and windows of the power distribution room should be closed tightly; the door should be opened outwards, but the door leading to the high-voltage power distribution room It should be a two-way opening door.
Holes and ventilation holes connected to the outdoors should be equipped with safety protection measures to prevent rats, snakes and other small animals from entering (for example, when using metal mesh, the mesh should not be larger than 10mm*10mm). Indoor cable trenches require waterproofing and drainage measures.
Extended information:
Notes on power distribution rooms
1. Cables in the power distribution room should be placed in cable trenches and covers should be added. . Insulating pads should be placed on the front and back of the distribution cabinet, and the length of the insulating pad should be greater than the width of the distribution cabinet.
2. When the length of the distribution room exceeds 7m, two outlets should be provided and should be arranged at both ends of the distribution room. The power distribution room should be equipped with protective equipment such as insulating mats, insulating rods, insulating gloves, and insulating shoes, as well as emergency lighting and fire-extinguishing equipment.
3. The "Beware of Electric Shock" safety warning sign is posted on the door of the distribution box (cabinet). The metal box (cabinet) door and the metal box (cabinet) body must be electrically connected using braided soft copper wire.
Reference: Baidu Encyclopedia-Power Distribution Room