Fire compartments and PV

Solar panels are increasingly being installed on business premises. This is also happening more and more frequently on buildings with surfaces comparable to  several soccer fields. Roofs with a large surface area are often divided into several compartments by means of a fire-resistant wall. These fire compartments must ensure that it takes some time (30, 60, 90 or 120 minutes) for a fire from one compartment to spread to the adjacent compartment. The purpose of this is to limit the expansion/spread of the fire.

Many insurers require that cabling should not be simply pulled across the fire barrier. Should it be necessary for the cabling to be routed from one compartment to another, measures will have to be taken to prevent the fire from spreading through the cabling to the next compartment. The cable route should not adversely affect the fire resistance of the fire wall and the fire resistance should be at least equal to the fire resistance of the fire wall. To achieve this, it is recommended that the cabling is routed over the fire resistant wall. It is not recommended that the cabling be routed through the fire resistant wall. In addition, the cabling should be completely covered with a UV resistant covering that guarantees a fire resistance equivalent to the fire resistant wall. This must be provided on the section over the fire wall and up to 2 meters on either side of this wall (this distance may vary by insurer).

At Conduct Technical Solutions, we are always working to improve the fire safety of solar panel installations. We have developed a number of products to safely guide the cable route over the fire resistant wall:

RoofSupport Fire Wall Bracket is a technical solution for the easy laying of DC cables over fire resistant walls. The accompanying FireWrap, a fire resistant sleeve that is wrapped around the cables, offers 60 minutes resistance against fire penetration of the cables over the fire wall. In short: solar cables durable and safe over compartment walls.