Fire resistance cable YTTW
YTTW cable is designed for aboveground applications.
Engineered to replace conduit and wire applications, this all-in-one cable assembly offers fewer installation steps.
The copper metallic sheath protects the conductors from damage before,during and after installation and provides overall flexibility not available with a conduit.
| — Flame Retardant — High Operating Temperatures — LSOH Halogen-free — Great Mechanical Strength — Competitive Installed Cost — Public Places |
Our YTTW cables provide outstanding electrical and fire-proof properties, and are halogen free.
|
| National | International | |
| Construction | GB/T 12706 | IEC 60502 |
| Non fire-propagating | GB/T 18380.3 | IEC 60332-3 |
| Low opacity of smoke emitted | GB/T 17651.2 | IEC 61034-2 |
| Fire-resistant | GB/T 12666.6 | IEC 60331 |
| Low acidity and corrosiveness of gases | GB/T 17650.2 | IEC 60754-2 |
| Halogen free | GB/T 17650.2 | IEC 60754-1 |
| Non flame-propagating | GB/T 18380.1 | IEC 60332-1-2 |
Rated working voltage:
– Light Duty: 500 V
– Testing Voltage (50 Hz): 2500 V - 15 min
– Heavy Duty: 750 V
– Testing Voltage (50 Hz): 2000 V - 15 min
|
Conductor | Stranded copper conductor class 2 |
| Insulation | mica tape1, flame retardant | |
| Filler | Glass yarns | |
| core wraping | Core wrapping with glass-fibre tape as flame-protection | |
| Sheath | Corrugated Copper | |
| Outer covering (Optional) | Anticorrosion Outer Sheath PVC |
| Service Temperature | 90°C |
| Emergency Overload Temperature | 105°C |
| Short-Circuit Temperature | 250°C |
| Laying Temperature | should not be lower than 0°C |
| Minimum bending radius when laying | Single core: r = 6 x cable outer diameter |
| Sheath colour | The standard color is orange, other colors are available. |
|
Nominal cross Section |
Nominal insulation thickness |
Thickness of metallic sheath |
Outer Diameter approx. |
current carrying capacity |
Voltage drop |
| mm2 | mm | mm | mm | A | V/A.km |
| 1×1.0 | 0.80 | 0.40 | 3.53 | - | 23.10 |
| 1×1.5 | 0.80 | 0.40 | 3.78 | 32 | 15.40 |
| 1×2.5 | 0.80 | 0.40 | 4.18 | 42 | 9.48 |
| 1×4.0 | 0.80 | 0.50 | 4.85 | 56 | 5.90 |
| 1×6.0 | 0.80 | 0.50 | 5.36 | 70 | 3.90 |
| 1×10 | 1.00 | 0.50 | 7.02 | 97 | 2.33 |
| 1×16 | 1.00 | 0.60 | 8.24 | 125 | 1.47 |
| 1×25 | 1.00 | 0.60 | 9.56 | 165 | 0.92 |
| 1×35 | 1.00 | 0.60 | 10.70 | 200 | 0.67 |
| 1×50 | 1.20 | 0.70 | 12.60 | 245 | 0.49 |
| 1×70 | 1.20 | 0.70 | 14.40 | 305 | 0.34 |
| 1×95 | 1.20 | 0.80 | 16.50 | 375 | 0.25 |
| 1×120 | 1.20 | 0.80 | 18.14 | 435 | 0.20 |
| 1×150 | 1.40 | 0.80 | 20.15 | 500 | 0.16 |
| 1×185 | 1.40 | 0.90 | 22.10 | 580 | 0.13 |
| 1×240 | 1.40 | 0.90 | 24.85 | 685 | 0.10 |
| 1×300 | 1.60 | 1.00 | 27.70 | 795 | 0.08 |
| 1×400 | 1.60 | 1.00 | 30.40 | 930 | 0.06 |
|
Nominal cross Section |
Nominal Insulation thickness |
Thickness of metallic sheath |
Outer Diameter approx. |
Ampacity |
Voltage drop |
| mm2 | mm | mm | mm | A | V/A.km |
| 2×2.5 | 0.80 | 0.50 | 6.96 | 33 | 18.96 |
| 2×4.0 | 0.80 | 0.60 | 8.10 | 44 | 11.8 |
| 2×6.0 | 0.80 | 0.60 | 9.12 | 57 | 7.8 |
| 2×10 | 1.00 | 0.70 | 12.44 | 78 | 4.66 |
| 2×16 | 1.00 | 0.70 | 14.48 | 104 | 2.86 |
| 2×25 | 1.00 | 0.80 | 17.32 | 135 | 2.52 |
| 2×35 | 1.10 | 0.80 | 19.90 | 168 | 2.24 |
| 2×50 | 1.20 | 0.90 | 23.00 | 204 | 1.64 |
| 2×70 | 1.20 | 1.00 | 26.80 | 263 | 1.42 |
| 2×95 | 1.20 | 1.00 | 30.60 | 320 | 1.08 |
| 2×120 | 1.20 | 1.00 | 33.88 | 373 | 0.98 |
|
Nominal |
Nominal insulation thickness | Thickness of
metallic sheath |
Outer Diameter approx. |
Ampacity |
Voltage drop |
| mm2 | mm | mm | mm | A | V/A.km |
| 3×2.5 | 0.8 | 0.60 | 7.56 | 29 | 16.4 |
| 3×4.0 | 0.8 | 0.60 | 8.57 | 38 | 10.2 |
| 3×6.0 | 0.8 | 0.60 | 9.67 | 46 | 6.74 |
| 3×10 | 1.0 | 0.70 | 13.22 | 65 | 4.03 |
| 3×16 | 1.0 | 0.70 | 15.42 | 85 | 2.54 |
| 3×25 | 1.0 | 0.80 | 18.46 | 118 | 1.59 |
| 3×35 | 1.1 | 0.80 | 21.43 | 150 | 1.16 |
| 3×50 | 1.2 | 0.90 | 24.55 | 192 | 0.85 |
| 3×70 | 1.2 | 1.00 | 28.63 | 228 | 0.59 |
| 3×95 | 1.2 | 1.00 | 32.72 | 273 | 0.43 |
| 3×120 | 1.2 | 1.00 | 36.26 | 314 | 0.35 |
| Nominal cross Section |
Nominal insulation thickness | Thickness of
metallic sheath |
Outer
Diameter approx. |
Ampacity | Voltage
drop |
| mm2 | Mm | mm | mm | A | V/A.km |
| 4×6.0 | 0.8 | 0.60 | 10.59 | 46 | 6.74 |
| 4×10 | 1.0 | 0.70 | 14.52 | 65 | 4.03 |
| 4×16 | 1.0 | 0.80 | 17.18 | 85 | 2.54 |
| 4×25 | 1.0 | 0.90 | 20.57 | 118 | 1.59 |
| 4×35 | 1.1 | 1.00 | 23.86 | 150 | 1.16 |
| 4×50 | 1.2 | 1.00 | 27.34 | 192 | 0.85 |
| 4×70 | 1.2 | 1.00 | 31.69 | 228 | 0.59 |
| 4×95 | 1.2 | 1.00 | 36.27 | 273 | 0.43 |
| Nominal cross Section |
Nominal insulation thickness | Thickness of
metallic sheath |
Outer
Diameter approx. |
Ampacity | Voltage
drop |
| mm2 | mm | mm | mm | A | V/A.km |
| 3×16+1×10 | 1.0 | 0.80 | 16.56 | 85 | 2.54 |
| 3×25+1×16 | 1.0 | 0.90 | 19.77 | 118 | 1.59 |
| 3×35+1×16 | 1.1 | 1.00 | 22.18 | 150 | 1.16 |
| 3×50+1×25 | 1.2 | 1.00 | 25.87 | 192 | 0.85 |
| 3×70+1×35 | 1.2 | 1.00 | 29.81 | 228 | 0.59 |
| 3×90+1×50 | 1.2 | 1.00 | 34.04 | 273 | 0.43 |
Notes:
Ampacities based on 90°C conductor temperature and 40°C ambient temperature according to IEC 287 standard
The voltage drop based on conductor temperature 90°C is on the high side calculated only for reference
When the cable adopt compressed cores, diameter of cable should be 95% of normal diameter, diameter of metallic sheath should be adjusted correspondingly. When enhancing the insulation, outer diameter of cable is increased for about 5%.
1 Glass cloth reinforced Muscovite mica tape
2 Current ratings in Ampere (A) up to 30° C ambient temperature
