Questions about emergency power supplies

I understand your question now. In these regulatory provisions, “toxic gases” generally refer to those gases or vapors listed in GBZ 2.1 \"Occupational Exposure Limits for Hazardous Factors in the Workplace – Part 1: Chemical Hazardous Factors\" that can cause acute poisoning or chronic health damage upon inhalation through the respiratory tract; such as chlorine, ammonia, hydrogen sulfide, carbon monoxide, hydrogen cyanide, and other toxic substances commonly involved in chemical processing processes. However, the specific scope depends on the chemicals actually involved in the project as well as the design criteria. Regarding whether emergency power supplies fall under the category of \"particularly important loads among first-class loads,\" it can be analyzed as follows: according to the relevant classifications in the \"Code for Design of Power Supply and Distribution Systems\" GB 50052, particularly important loads among first-class loads usually require dual power supplies in addition to emergency power supplies. If the power supply to such emergency response systems is interrupted, it could lead to casualties or serious environmental pollution incidents; in practice, many designs classify them as particularly important loads, and provide diesel generators or battery banks independent of the regular power supply as emergency power sources. However, the final decision should be made based on the project’s power supply classification requirements as well as any specific comments from local plan review or safety inspections. It is recommended that you consult the “Fire Protection Standards for Engineering Design of Fine Chemical Enterprises” and the “Design Code for Electrical Installations in Explosive Atmospheres” that apply to the project for further confirmation, or seek advice from electrical design professionals. I hope these analyses are helpful to you; feel free to continue the discussion.