Fireproofing of Busbar Cable Trays
Cable trays and busways at floor level or at slab penetrations shall have a waterstop no less than 50 mm in height. At slab penetrations, provide 20–30 mm of firestopping and install a fire-support plate at the top. With four diferent test methods (t1–t4) based on diferent assumptions (ignition source, without wind and with wind and with additional radiation) the spreading of fire throughout the interior and exterior of the roof, the external and internal damages and the possible. Scope: Firestopping for busway, cable trays, cables, and trunking passing through walls in enclosed electrical installations. This data sheet provides guidance on the protection of cables against fire hazards created by occupancy exposures, and the protection of occupancies against fire hazards created by exposure from cables. This includes, but is not limited to, communication, power, distribution, and subsea cable. Our Durasteel cable enclosures are also assessed in accordance with the standard defined in BS EN 1366-5:2003 for a fire from both 'outside to in' and 'inside to out'.
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