Protecting the wiring adequately will be crucial when electrical supply systems must be kept in optimal running conditions during fires. In tunnels, heavy traffic buildings or high-rises, it is of paramount importance to perform orderly evacuations while
basic systems keep running.
Tecbor® 40 mm has been tested covering a cable tray from different sections and evaluated according to UNE EN 1363-1 general requirements, following the heating curve defined by UL 1709 standard.
Electric conductivity, short-circuit between cables and earth fault have been also added. Facilities may be accessed through inspection hatches. Likewise, Tecsel® Grids allowing for ventilation and sealing the hole in case of fire have been tested (For additional information, please contact our Sales Department.).
Standard: UNE EN 1363-1. Ul 1709 Heating Curve
1. Tecbor® 40 mm boards.
The tray is protected by a layer of Tecbor® 40 mm boards set together with 5.2×80 mm self-tapping screws. At duct section joints, place a 200 mm wide board strip of 20 mm Tecbor® B and fix it to the metal tray and to each other using 3.5×45 mm screws.
The duct is anchored to the slabs with a 12 mm rod and supported by 50x50x5 mm angle sections.
Board joints and screw heads should be covered with Tecbor® joint paste ready to use.
Fill the hole between the duct and the structural work with 50 mm and 145 kg/m3 rock wool and paint both sides with Tecbor® joint paste 1 ready to use.