These initials indicate LOW SMOKE + O (Zero) HALOGENS:
– LOW SMOKE. Referring to the following standards::
EN 61034: Measurement of smoke density of cables burning under defined conditions. IEC 61034 also.
Low Smoke means low opacity of emitted smoke.
– O (Zero) HALOGEN. Referring to the following standards::
EN 50267: Common test methods for cables under fire conditions. Test on gases evolved during combustion of materials from cables. Determination of the amount of halogen acid gas. IEC 60754 also.
So Zero Halogens mean no acid gases emitted by the combustion.
To learn more about common cabling acronyms: CABLING ACRONYMS
