70mm 4-core fire-resistant flexible cable with a Tough Rubber Sheath (TRS) is a heavy-duty power cable designed to maintain electrical functionality during a fire while offering high flexibility and resistance to physical and environmental stresses.
Specifications
- <p>70mm 4-core fire-resistant flexible cable with a Tough Rubber Sheath (TRS) is a heavy-duty power cable designed to maintain electrical functionality during a fire while offering high flexibility and resistance to physical and environmental stresses. </p><p>Key Features and Construction</p><p>Conductor: Typically consists of plain annealed stranded copper for excellent conductivity and flexibility, with a cross-sectional area of 70mm² for each of the four cores.</p><p>Cores: Four cores are commonly color-coded (e.g., brown, black, grey, and blue) and are used for three-phase power distribution plus a neutral wire.</p><p>Insulation: The individual cores are insulated with fire-resistant material, such as mica glass tape (MICA) and/or Cross-Linked Polyethylene (XLPE), which provides thermal stability and electrical insulation even under extreme heat.</p><p>Sheath (TRS/Rubber): The outer sheath is made of a robust rubber compound (TRS/PCP/EPR) that provides mechanical protection and resistance to abrasion, oil, grease, acids, chemicals, and UV sunlight, making it suitable for both indoor and outdoor use.</p><p>Fire Performance:</p><p>Fire-Resistant: The cable is designed to resist the spread of flames (flame-retardant to IEC 60332 standards) and maintain circuit integrity for a specified time during a fire, as required by standards like IEC 60331-25 or BS 7846.</p><p>Low Smoke Zero Halogen (LSZH/LSHF): Often, fire-resistant cables incorporate LSHF bedding and sheathing to minimize the emission of smoke and toxic fumes in a fire, which is critical for use in public areas like hospitals, shopping centers, and subways. </p>
