Must fire-fighting cable trays be fireproof cable trays

Yes, cable trays used in fire-fighting systems generally need to be fire-resistant or fireproof to ensure operational integrity and prevent fire propagation.Fire Resistance NecessityCable trays in fire-fighting systems carry critical power and control circuits that must remain functional during a fire. Using fireproof or fire-resistant trays helps prevent the spread of flames, smoke, and toxic gases, and ensures that fire-fighting equipment continues to operate under emergency conditions . Standard trays without fire protection may fail quickly, allowing fire to propagate vertically or horizontally, especially in multi-story buildings .Materials and FireproofingThe most effective fire-resistant trays are made of steel or aluminum with fireproof coatings. Coatings or fireproof tapes, such as FLAMMOTECT-A or DG-CR 0.7, can enhance flame resistance and maintain cable functionality during a fire . For installations passing through walls or floors, fire-rated penetration sealing materials are required to maintain compartmentalization and prevent fire spread .Installation ConsiderationsVertical trays act like chimneys; fire can travel rapidly along them if not protected .Sealing penetrations with firestop packs, mastic, or mineral wool is essential for maintaining fire integrity .Routine inspection of fireproof coatings and tray integrity ensures long-term effectiveness .Segregation of power and signal cables in dedicated trays reduces risk of interference and localized overheating .SummaryFor fire-fighting systems, fireproof cable trays are strongly recommended or required by safety standards. They help maintain the functional integrity of critical circuits, reduce fire spread, and comply with fire safety regulations. Using standard trays without fire resistance is not advisable in high-risk or emergency-critical applications. Proper material selection, fireproof coatings, and firestopping measures are key to ensuring safety and compliance .