Halogen-free flat cables (LSOH / LS0H / OHLS) are flat construction power and control cables with low-smoke, zero-halogen insulation and sheath materials — eliminating the toxic HCl gas and dense smoke produced by standard PVC or PVC-sheathed flat cables in a fire. These cables are mandatory in installations where fire safety regulations require LSOH materials: public buildings, transport infrastructure, data centres, hospitals, tunnels, and offshore platforms.
Constructed with cross-linked polyolefin (XLPE) or thermoplastic elastomer (TPE) insulation and a halogen-free thermoplastic or thermosetting outer sheath, halogen-free flat cables meet IEC 60754-1 (zero halogen content), IEC 61034-2 (low smoke density), and IEC 60332-1 (flame retardancy). Available in 2 to 24 cores; 0.5 mm² to 6 mm²; rated 300/500V or 450/750V.
Specify halogen-free flat cables wherever national building regulations, project specifications, or client standards mandate LSOH materials — typically in IEC/EN installations using CPR (Construction Products Regulation) class Eca or higher, or wherever IEC 60332 and IEC 61034 compliance is specified.
Standard PVC flat cables produce HCl gas concentrations of 200–500 ppm during combustion — immediately dangerous to life. LSOH halogen-free cables produce near-zero HCl and maintain optical density (smoke) within survivable limits, giving occupants critical additional evacuation time.
