Illustrated explanation
2Intumescent sealFire behaviour and a fire-resistant penetration are different
- Fire-rated cable gland
The cable entry is part of the specified fire-exposure assembly. Require its tested arrangement rather than relying on a trade description.
- Intumescent sealThis term
The material expands under defined conditions and closes the intended space. Geometry, activation and complete assembly evidence matter.
- Reaction to fire / fire resistance
Material combustion behaviour differs from an assembly’s ability to resist a stated fire exposure. Do not substitute one result for the other.
An intumescent element can expand under its specified fire exposure. The wall, cable, entry and sealing system together determine a tested penetration arrangement.
Conceptual fire-response sections, not a fire-test result. Material reaction to fire and assembly fire resistance are different assessments with stated test conditions.