CABLE TRAYS FOR PROPER SECTORIZATION IN BUILDINGS

You will find in this post a small guide of the alternatives to carry out a correct sectorization to the fire. In particular , we'll be focused on the electrical trays since electricity is a key factor that must be sealed in the passage between different sectors of a building.

To achieve the perfect sectorization of cable trays, there are two main systems: on the one hand, to use high-density mineral wool with an ablative coating and, on the opposite , to use the so-called intumescent pillows.

Using High Density mineral wool and an Ablative Coating This is the most common method for this type of electrical installation. It consists of two steps: first, we'll place pressure rock wool of 145 Kg / m3 of density in different thicknesses. This thickness depends on the specified fire resistance. Then, we'll apply by airless spray, gun or roller, 1.5mm on each side of the tray. This technique is valid for passages of trays in partitions and frames.

Additionally, the ablative coating (20 cm wide) must be applied within the tray and the cables. This may prevent the passage of the heat by radiation through the metallic elements to the sector adjacent to.

If a replacement cable is added to the installation, it's possible to drill the seal – thanks to the high density of the Rock Wool – and recoat the area .

Using Intumescent Pillows

We will place elongated intumescent pillows that completely fill the gap between the cable tray and the partition. just in case of fire and thanks to the intumescent material that is included inside, these pillows swell slightly preventing the passage of smoke and flames, equally acting as a temperature insulator.

Despite its advantages and protective qualities against fire, this technique is not recommended in trays that go through floors as the pillows could lose their firmness. On the other hand, we must highlight the importance of the upkeep and the supervision of the installation. The shortage of even a pillow in the installation affects its correct operation.

Therefore, it's essential to carry out periodic reviews and confirm that all the necessary pillows are in the correct place.

For the fire protection of the electrical trays, the market offers other alternatives like foams or mortars with a previous formwork. However, the value and complexity of application rise with respect to the mentioned solutions.

Cable tray manufacturers

like Hutaib Electricals offer product lines that are developed for installations with unusual requirements. For instance , if an installation requires running a cable tray over a road, the

cable tray

must be strong enough to bridge 30 feet between supports. At the opposite end of the product range is the short span, with supports every 4 to 5 feet that may need to be field-adaptable to fit restricted space requirements of a retrofit. Between these sets of needs could also be a broad range of variables, which can be resolved by different cable tray products. In fact, increasingly larger-sized cable trays are required that provide the selection of adding more cable later. Today’s installations are calling for manufactured support systems that are designed to hold Category 5 and 6 cables. As Cable Trays performance keeps increasing day by day,

cable tray manufacturers in India

are keen on providing future warranties of the performance. Accordingly , the necessity for one of the best cable trays becomes important so the cable tray performance is not affected by bad cable tray management .