How fire survival cables protect us ?

[Rallison Electrical]

Fire survival cable constructions can be single-core or multi-core. Depending on the application, the cable can be unarmored, armored, braided, with or without metallic screening. Single-core or multi-core fire-resistant cable constructions are available. Depending on the application, the cable can be unarmored, armored, braided, with or without metallic screening. Fire resistant cables, also known as circuit integrity cables, continue to operate in the presence of a fire.

When a fire is caused the cables do not immediately close down. Instead, power is still flowing across the circuit.This electricity is directed toward fire pumps, elevators, smoke control equipment, fire alarm systems, and other emergency systems that are assigned to keep people safe during an emergency. As a result, the sudden transfer of power to the areas that are of primal importance helps people to vacant the building more smoothly and safely.

Modern cables have a complex multicomponent design: they consist of an outer and insulating conductors of an inner sheath, which, when burned, emit gases hazardous to human life - hydrogen chloride HCI, carbon monoxide CO and others. During operation, the cable, especially the power cable, often heats up and, in case of violation of the technical parameters of operation, there is a danger of fire.

One of the ways to solve this problem is to use special fire protection coatings for cables , which are applied to the cable immediately after the wiring is installed. The application of such coatings is of great practical importance in terms of reducing or eliminating the risk of the occurrence and spread of fires.

Fire survival cables or Fireproof cable penetrations are designed to protect the places of passage of cable lines through enclosing structures (walls, ceilings, internal fireproof partitions) with a standardized fire resistance limit.

In this case, the fire resistance limit of cable penetration must not be lower than the fire resistance limit of the enclosing structure crossed by the cables. The materials for the termination of cable penetrations and the penetrations themselves are subject to certification.