User Documentation

2053260000/05/201536
Planning
2.11 Fire protection and re load
Fire protection
The main causes of re in electrical lines include:
• Short-circuits and earth faults, e.g. on mechanical or thermally damaged
cables or lines
• Faulty electrical connections (loose contact)
• Previous damage to insulation
• Overload
• Heat accumulation
Note:
• Install large quantities of cables in the space above suspended ceilings or the
space below raised oors.
• Use cables whose sheath is made of zero-halogen, non-corrosive, ame-
retardant, low-smoke and low-gas materials.
Fire load/re propagation
Fire load is the combustible energy of a cable.
Fire propagation describes the behaviour of the cable in the event of a re:
• Good re propagation means the re can be spread by the combustible
material of the cable in the event of a re (like an igniter cord).
• Poor re propagation (desirable) is achieved by using materials that have a low
combustible energy.
• Calculate and document the re load of the cabling in every zone.
CAUTION!
Observe the local re and building regulations!