Mineral insulated Fire resistance cable
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.
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

| — 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 | 
|  | 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. | 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 | 
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
