Fire-Rated Cables

Fire-rated cable covers two distinct jobs that get confused with each other on a BOQ. Fire-resistant (FR) cable, built with mica glass tape or ceramifiable insulation around the conductor, keeps a circuit electrically alive for a defined period under direct flame, typically rated to BS 6387 or IEC 60331 test categories. Fire-retardant LSZH cable doesn't promise circuit continuity in a fire; it's built to slow flame spread along the cable run and release low smoke and no halogen acid gas if it burns, tested to IEC 60332 and IEC 61034. A project spec that calls out both properties in one cable needs a combined FR/LSZH construction, and it's worth checking the actual clause before ordering the wrong one.

NLS sources both classes, single-core and multi-core, in the conductor sizes and voltage classes hospital and aviation projects specify for life-safety circuits: emergency lighting, fire alarm panels and detector loops, smoke extraction and pressurization fan feeds, sprinkler and jockey pump power, and PA/voice-alarm systems. These are exactly the circuits where a building code or a fire consultant's spec won't accept a standard PVC cable, and where a wrong substitution shows up at commissioning, not before.

Given the standards involved, NLS treats fire-rated cable orders with the same documentation discipline it applies on Aramco-scale cable packages: manufacturer test certificates against the specified standard travel with the delivery, not as an afterthought. A project team sends the fire rating clause from the spec (BS 6387 category, or the LSZH/FR requirement as written), conductor size, and circuit count, and NLS returns a priced quote in USD with lead time based on the specific construction ordered, since fire-rated cable is a lower-volume, made-to-spec product than standard XLPE feeder cable and typically carries a longer lead time.