Under no circumstances should cable and WIRE act as fuses enabling a fire to spread. They must not act as fuel for a fire, and should not release any dangerous substances. That is exactly what happens with materials whose flame retardation is based on halogens – i.e. fluorine, chlorine, bromine or iodine. Halogens are present in polymers like PVC, FEP, and PTFE. PUR, PP, P and TPE materials are often added as flame retardants. They can escape in case of a fire, and smother the surrounding flames. Later, however, they combine with water vapour to form acids that cause irritation to the eyes, skin and respiratory system, as well as attacking metal and glass.
HELUKABEL safety cables are halogen-free. The flame retardation is based on aluminium hydroxide. In case of fire, it gives off water
that crystallises. This cools down the surface and displaces oxygen, thereby inhibiting ignition. No corrosive gases are produced, only light smoke and the danger of toxic gases is much lower. HELUKABEL offers a wide range of halogen-free cables, such as the MULTIFLEX 512 PUR, JZ 500 HMH, MEGAFLEX 500. These have proven their flammability properties in rigorous testing according to VDE and DIN-EN safety standards.
For special applications, there are cables and wires with the FE 180 / E 30 specification. During a fire, these remain functional for at least 30 minutes, and offer insulation integrity for up to 180 minutes. In this way, they ensure the emergency operation of lifts, doors, etc. as well as safety, fire alarm and emergency systems.