Can strong and weak current cable trays be installed on the exterior walls of Class A warehouses that constitute major hazard sources?
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This post was last edited by cww9521 on 2023-5-25 at 14:02. In recent years, safety regulatory authorities have intensified their inspections of hazardous chemical enterprises, especially those facilities or storage units that constitute major hazards. The existing Class A warehouses are classified as major hazard sources of level four based on their R values. Through continuous improvements resulting from annual safety inspections, various electrical and instrumentation equipment as well as monitoring systems have been added; these systems include remote start for emergency exhaust ventilation, detectors for flammable and toxic gases, warehouse surveillance systems, access control systems, intrusion prevention systems for hazardous substance storage areas, remote start for emergency sprinklers, EPS power supply for explosion-proof air conditioning, fire emergency evacuation signage, fire-related low-voltage systems, and temperature and humidity monitoring systems. As a result, the exterior walls of these Class A warehouses are covered with numerous such components, resembling a spider web. The question now is: Can strong and weak current cable trays be installed on the exterior walls of Class A warehouses, which constitute major hazard sources? What are the regulatory provisions or **official documents issued by regulatory authorities that serve as a basis? Welcome colleagues to discuss: handshake. Automatic control instruments
Answer: In accordance with Article 45 of the Regulations on the Safety Management of Hazardous Chemicals, hazardous chemical production and operation units shall, in line with the requirements of relevant technical standards, install necessary safety facilities in locations where hazardous chemicals are stored, loaded and unloaded, transported, used, and their waste is disposed of. At the same time, appropriate safety protection facilities should be installed according to the different hazardous chemicals and process requirements. Therefore, when installing the strong and weak current cable trays on the exterior walls of Class A warehouses, it is necessary to comply with the requirements of **relevant technical standards, and to install the necessary safety and protective facilities in accordance with the provisions of safety management regulations. At the same time, it is necessary to strictly comply with electrical safety regulations to ensure the proper operation of the equipment, as well as to protect personal safety and property. In summary, when installing strong and weak current cable trays on the exterior walls of Class A warehouses, a thorough safety analysis and assessment should be conducted to ensure the safety and reliability of the facilities, while also complying with relevant regulations and standards. .
What type of Class A materials are stored in this Class A warehouse? Is it completely enclosed or semi-open, and does it have windows? It’s possible that the exterior wall of your Class A warehouse falls within an explosion-proof area; this depends on how your explosion-proof zone classification is defined, and it’s likely classified as Zone 2. Cable trays can be installed on the exterior walls of the warehouse, but they must be arranged in strict accordance with the relevant specifications. If the trays are installed according to these specifications, the cost may be relatively high; in that case, it is more economical to bury the cables underground. The relevant standards should refer to GB50058 and SHT3552.
First of all, thank you for getting back to me. Class A warehouses store hazardous chemicals classified as Class AA and A, as well as highly toxic substances. The warehouses are completely enclosed, with windows on both the upper and lower levels of the walls; their exterior walls fall under Explosion Protection Zone 2. The purpose of installing cable trays is mainly to facilitate the addition of cables in the future, as well as to keep the area around the warehouse neat and tidy.
It can be used as a cable tray, as long as it meets the requirements specified in 5.4.3 of GB50058.
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