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BS 5308 mica insulation armoured fire resistant versions (Part 1 Type 2) are typically used in chemical and process industries where there is danger of fire. The galvanised steel wire armour provides excellent protection.
| Conductor | Annealed or tinned copper, Class 2 |
|---|---|
| Insulation | Mica glass tape, XLPE (Cross Linked Polyethylene),or PE (optional) |
| Pairing | Two insulated conductors uniformly twisted together with a lay not exceeding 100mm |
| Colour code | See technical information |
| Binder tape | PETP transparent tape |
| Collective screen | Aluminium/polyester tape is applied over the laid up pairs metallic side down in contact with tinned copper drain wire, 0.5mm^2 |
| Inner Sheath | LSOH(Low Smoke Zero Halogen) sheath |
| Amour | Galvanized steel wire armour |
| Outer sheath | LSOH(Low Smoke Zero Halogen) sheath Flame retardant to IEC60332-3-22 Fire resistant to IEC60331 Halogen free to IEC60754-1 Low smoke emission to IEC61034-1-2 |
| Sheath colour | Black or blue |
| Operating temperature | -20C up to + 90C( fixed installation) |
| 0C to +50C(during operation ) | |
| Minimum bending radius | 6 x overall diameter |
| Conductor Area Size | mm^2 | 0.5 | 0.75 | 1.0 | 1.5 | |
|---|---|---|---|---|---|---|
| Conductor Stranding | No. x mm | 7 x 0.3 | 7 x 0.37 | 7 x 0.44 | 7 x 0.53 | |
| Conductor resistance max | ohm/km | 36 | 24.5 | 18.1 | 12.1 | |
| Insulation resistance min | Gohm/km | 5 | 5 | 5 | 5 | |
| Capacitance unbalance at 1 kHz(pair to pair screen) | pF/250m | 250 | ||||
| Max. Mutual Capacitance @ 1 kHz forNon OS or OS cables (except one-pair and two-pairs) | pF/m | 75 | 75 | 75 | 75 | |
| Max. Mutual Capacitance @ 1 kHz IS/OS cables (include 1 pair and 2 pair) | pF/m | 115 | 115 | 115 | 115 | |
| Max. L/R Ratio for adjacent cores(Inductance/ Resistance) | μH/ohm | 25 | 25 | 25 | 40 | |
| Test voltage | Core to core | V | 1000 | 1000 | 1000 | 1000 |
| Core to screen | V | 1000 | 1000 | 1000 | 1000 | |
| Rated voltage max | V | 300/500 | 300/500 | 300/500 | 300/500 | |
| No.of Pairs | No.and Dia. of Wires | Nominal Conductor Cross-Sectional Area | Nominal Thickness of Insulation | Nominal Thickness of bedding | Nominal Dia. over Bedding | Nominal Thickness of Armour | Nominal Thickness of Sheath | Nominal Dia. of Cable | Approx. Weight |
|---|---|---|---|---|---|---|---|---|---|
| no./mm | mm^2 | mm | mm | mm | mm | mm | mm | kg/km | |
| 1 | 7/0.44 | 1 | 0.6 | 0.8 | 7.0 | 0.9 | 1.4 | 11.6 | 340 |
| 2 | 7/0.44 | 1 | 0.6 | 0.8 | 8.4 | 0.9 | 1.4 | 13.0 | 350 |
| 5 | 7/0.44 | 1 | 0.6 | 0.8 | 12.3 | 0.9 | 1.4 | 16.9 | 740 |
| 10 | 7/0.44 | 1 | 0.6 | 0.8 | 16.5 | 0.9 | 1.4 | 21.1 | 1150 |
| 20 | 7/0.44 | 1 | 0.6 | 0.8 | 21.4 | 0.9 | 1.4 | 26.0 | 1840 |
| 1 | 7/0.53 | 1.5 | 0.6 | 0.8 | 7.5 | 0.9 | 1.4 | 11.9 | 320 |
| 2 | 7/0.53 | 1.5 | 0.6 | 0.8 | 9.1 | 0.9 | 1.4 | 13.7 | 410 |
| 5 | 7/0.53 | 1.5 | 0.6 | 0.8 | 14.8 | 0.9 | 1.4 | 21.1 | 910 |
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