What is the Fire load values of cables ?

fire load

When a cable burns, combustion heat – the energy released per unit of length – is given in kWh/m.

When cable runs for buildings or other infrastructure are planned, the fire load of the cables used must be taken into consideration from the outset.

To comply with required tolerances, the fire load can be reduced by dividing the cabling between multiple cable ducts or changing the cable routing.


Inclusion in the calculation of fire loads on and in buildings Current regulations and standards governing the assessment and restriction of consequential fire risks vary from country to country.
In Germany, the valid state building regulations stipulate the inclusion of specific thresholds with regard to the accumulation of combustible parts of the building installation – which also includes cables – directly connected to the building. Flexible cables are not intended for fixed installation in buildings. However, the approximate fire load of such cables can be calculated as follows:

look up the "Approx. weight in kg/km" in the ordering table on the relevant product page of the catalogue and
• subtract the copper content (see column "Copper index in kg/km"in the catalogue) from this value. This results in the mass of the combustible insulation and sheathing material for the relevant articlein kg/km,
• divide this value by a factor of 1000 to obtain the combustible mass in kg/m,
• multiply this value by the material-specific calorimetric value (in kWh/m or MJ/m) of the cable or wire as per table below



Source : You are not allowed to view links. Register or Login

You are not allowed to view links. Register or Login

You are not allowed to view links. Register or Login