Low Smoke & Fume
LSF conduit & accessories
Round conduit made from specially formulated super high impact self-extinguishing PVC-U with properties that minimise the generation of smoke. LSF heavy gauge conduit exceeds the most stringent requirement of the British Standards, so that in the event of a fire the emission of smoke and fume is much lower than standard PVC-U.
LSF Range
Grey · heavy gaugeLSF round conduitAEKMCR6LSGR – AEKMCR12LSGR, 20–50mm, 2.9m
LSF fittingsStraight & expansion couplers, plain bends, adaptors, bushes, saddles
LSF circular boxesFull nine-configuration range plus lids and gaskets
LSF adaptable boxesPVC-U and ABS, up to 380×280×90mm
LSF switch boxes & cover platesSurface and flush, 1 & 2 gang
LSF flexible conduit20–50mm with adaptors and glands
Supplied in grey as standard. Available in black in special cases, subject to minimum order quantity.
LSF characteristics
| Smoke / HCl emission | ASTM E662 · IEC 60754-1 |
| Limiting oxygen index (ASTM 2836) | 50% O₂ |
| UL 94 (Underwriters Laboratory) | V-0 passed |
| Flammability | Self-extinguishing |
| Vicat softening point | 86 °C |
| Thermal expansion | 5.0 × 10⁻⁵ / °C |
| Chemical resistance | Inorganic acids, alkalis and salts |
| Mechanical & electrical | To BS EN IEC 61386-21 |
Note: the terms "halogen free", "low smoke and fume (LSF)" and "low acid-gas" do not in themselves equate to low fire hazard. Rigid PVC-U is inherently flame retardant, has a low rate of smoke production in the critical early stages of a fire, chars and self-extinguishes, and does not produce flaming droplets.