Wires with XLPE insulation, low smoke, halogen-free, flame retardant (Type C), 1 core × 2.5 mm², rated voltage 450/750 V. Standard: Manufactured in accordance with JB/T 10491 (cross-linked polyolefin insulated wires, 450/750 V) and GB/T 19666 for flame retardancy. Applications: Building wiring in high-rise buildings, public venues and tunnels where low smoke, halogen-free and higher operating temperature performance are required. Characteristics: Low smoke zero halogen (LSZH) materials — low smoke emission, no halogen and low toxicity in fire; Type C flame retardant; XLPE insulation with 90 °C conductor temperature; thinner insulation than PVC types. Technical parameters: 1 core × 2.5 mm² copper conductor, rated voltage 450/750 V, AC.