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Flexible fire-resistant cableB

This standard is primarily based on GB/T 12706.1-2020, "Extruded Insulated Power Cables and Accessories for Rated Voltages from 1 kV (Um = 1.2 kV) to 35 kV (Um = 40.5 kV), Part 1: Cables for Rated Voltages of 1 kV (Um = 1.2 kV) and 3 kV (Um = 3.6 kV)," as well as GB/T 19666-2019, "General Rules for Flame-Retardant and Fire-Resistant Wires and Cables," among other relevant standards. This product is intended for critical electrical engineering applications, including hazardous areas such as airports, oil depots, liquefied gas stations, chemical plants, coal mines, nuclear power stations, steel mills, and shipyards; advanced and essential public facilities like satellite ground stations, railway wiring systems, alarm systems, and fire protection systems; and locations where personal and property safety must be ensured, such as historic buildings, hotels, high-rise structures, museums, libraries, banks, hospitals, insurance companies, shopping malls, and research institutions. Product Models and Nomenclature Model Name YTTW Copper-Conductor Corrugated Copper-Sheathed Inorganic Mineral Insulated Flexible Fire‑Resistant Cable YTTWV Copper-Conductor Corrugated Copper-Sheathed Inorganic Mineral Insulated Polyvinyl Chloride Sheathed Flexible Fire‑Resistant Cable YTTWY Copper-Conductor Corrugated Copper-Sheathed Inorganic Mineral Insulated Polyolefin Anti‑Corrosion Outer Sheath Flexible Fire‑Resistant Cable Product Specifications Model Rated Voltage Number of Cores Nominal Cross‑Sectional Area/mm² YTTW YTTWV YTTWY 450/750 V 0.6/1 kV 1 1.0–630 2 1.0–300 3 1.0–240 4 1.0–185 3+1 3×16+1×10 3×25+1×16 3×35+1×16 3×50+1×25 3×70+1×35 3×95+1×50 3×120+1×70 3×150+1×70 3×185+1×95 3×240+1×120 3+2 3×25+2×16 3×35+2×16 3×50+2×25 3×70+2×35 4+1 4×16+1×10 4×25+1×16 4×35+1×16 4×50+1×25 4×70+1×35 5–7 1.0–4.0 12–37 1.0–2.5 Nominal Thickness of the Copper Sheath Nominal Cross‑Sectional Area/mm² Nominal Thickness of Copper Sheath/mm 1 Core 2 Cores 3 Cores 4 Cores 5 Cores 7 Cores 12 Cores 19 Cores 24 Cores 30 Cores 37 Cores 1.0 0.4 0.4 0.4 0.4 0.45 0.45 0.4 0.4 0.4 0.4 0.4 1.5 0.4 0.4 0.4 0.4 0.45 0.45 0.4 0.4 0.4 0.4 0.4 2.5 0.4 0.4 0.4 0.4 0.45 0.45 0.4 0.4 0.4 0.4 0.4 4 0.4 0.4 0.4 0.4 0.45 0.45 / / / / / 6 0.4 0.4 0.4 0.4 0.45 0.45 / / / / / 10 0.4 0.45 0.45 0.45 0.5 0.5 / / / / / 16 0.4 0.45 0.45 0.5 0.5 / / / / / / 25 0.4 0.5 0.5 0.5 0.5 / / / / / / 35 0.45 0.5 0.5 0.5 0.5 / / / / / / 50 0.5 0.5 0.5 0.6 0.6 / / / / / / 70 0.5 0.5 0.6 0.6 0.6 / / / / / / 95 0.5 0.5 0.6 0.6 0.6 / / / / / / 120 0.5 0.5 0.6 0.6 0.6 / / / / / / 150 0.5 0.6 0.6 0.7 0.7 / / / / / / 185 0.5 0.6 0.6 0.7 0.7 / / / / / / 240 0.6 0.6 0.6 0.7 0.7 / / / / / / 300 0.6 / / / / / / / / / / 400 0.6 / / / / / / / / / / 500 0.6 / / / / / / / / / / 630 0.6 / / / / / / / / / / Note: For core counts not listed, the nominal thickness of the copper sheath should be selected as the value closest to that specified for the corresponding core count.

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Fire-resistant cable

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  • Product Description

  • This standard is primarily based on GB/T 12706.1-2020, “Extruded Insulated Power Cables and Accessories for Rated Voltages from 1 kV (Um = 1.2 kV) to 35 kV (Um = 40.5 kV)—Part 1: Cables for Rated Voltages of 1 kV (Um = 1.2 kV) and 3 kV (Um = 3.6 kV),” as well as GB/T 19666-2019, “General Requirements for Flame‑Retardant and Fire‑Resistant Wires and Cables,” among other relevant standards. This product is intended for critical electrical engineering applications, including hazardous areas such as airports, oil depots, liquefied gas stations, chemical plants, coal mines, (nuclear) power stations, steel mills, and shipbuilding facilities; advanced and essential public infrastructure, such as satellite earth stations, railway wiring systems, alarm systems, and fire‑protection systems; and environments where the safety of persons and property must be ensured, including historic buildings, hotels and guesthouses, high‑rise structures, museums, libraries, banks, hospitals, insurance institutions, shopping malls, and research institutes.

     

    Product Model and Naming

    Model numberName
    YTTWCopper‑core, corrugated copper‑sheathed, inorganic mineral‑insulated flexible fire‑resistant cable
    YTTWVCopper‑core, corrugated copper‑sheathed, inorganic mineral‑insulated, PVC‑jacketed flexible fire‑resistant cable
    YTTWYCopper‑core, corrugated copper‑sheathed, inorganic mineral‑insulated, polyolefin‑coated, corrosion‑resistant outer sheath, flexible fire‑resistant cable.

     

    Product Specifications

    Model numberRated voltageNumber of coresNominal Cross-Sectional Area/mm²
    YTTW 
    YTTWV 
    YTTWY    		450/750V
    0.6/1kV    		11.0~630
    21.0~300
    31.0~240
    41.0~185
    3+13×16+1×10
    3×25+1×16
    3×35+1×16
    3×50+1×25
    3×70+1×35
    3×95+1×50
    3×120+1×70
    3×150+1×70
    3×185+1×95
    3×240+1×120
    3+23×25+2×16
    3×35+2×16
    3×50+2×25
    3×70+2×35
    4+14×16+1×10
    4×25+1×16
    4×35+1×16
    4×50+1×25
    4×70+1×35
    5-71.0~4.0
    12-371.0-2.5

     

    Nominal thickness of the copper sheath

    Nominal cross-sectional area/mm²Nominal thickness of copper sheath / mm
    1 core2-core3-core4 cells5-core7-core12-core19-core24 cores30-pin37 cores
    1.00.40.40.40.40.450.450.40.40.40.40.4
    1.50.40.40.40.40.450.450.40.40.40.40.4
    2.50.40.40.40.40.450.450.40.40.40.40.4
    40.40.40.40.40.450.45/////
    60.40.40.40.40.450.45/////
    100.40.450.450.450.50.5/////
    160.40.450.450.50.5//////
    250.40.50.50.50.5//////
    350.450.50.50.50.5//////
    500.50.50.50.60.6//////
    700.50.50.60.60.6//////
    950.50.50.60.60.6//////
    1200.50.50.60.60.6//////
    1500.50.60.60.70.7//////
    1850.50.60.60.70.7//////
    2400.60.60.60.70.7//////
    3000.6//////////
    4000.6//////////
    5000.6//////////
    6300.6//////////
    Note: For conductor sizes not listed, the nominal thickness of the copper sheath shall be taken as the value closest to that specified for the corresponding conductor size.

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