HR-FR-LSH stands for Heat Resistant, Flame Retardant, Low Smoke and (low) Halogen. Heat Resistant means the insulation withstands higher operating temperatures; Flame Retardant means it resists spreading fire; and Low Smoke & Halogen means that, if exposed to fire, the cable emits less dense smoke and fewer corrosive, toxic halogen gases — which matters for safe evacuation in homes, hospitals and public buildings.
