Low Smoke Halogen Free Flame Retardant & Fire-resistant XLPE Insulated Twisted Connection Flexible Wire, 2 cores × 2.5 mm², rated voltage 300/500 V. Standard: Manufactured in accordance with GB/T 19666 and applicable wire standards (e.g., JB/T 10491 or equivalent); circuit integrity under fire per GB/T 19216 (IEC 60331). Applications: Fire alarm systems, emergency lighting circuits and signal/control connections in fire-critical installations of buildings and public facilities. Characteristics: Twisted-pair flexible construction; LSZH materials with low smoke and halogen-free performance; flame retardant and fire-resistant, maintaining circuit integrity under fire; XLPE insulation. Technical parameters: 2 cores × 2.5 mm² copper conductor, rated voltage 300/500 V, AC.