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BS5308 Cables Part 1 Technical Data

Maximum working voltage: 300/500V r.m.s.*

Test Voltage: 1000V r.m.s. between conductors and between conductors and screen/armour

Maximum conductor operating temp: + 65°C

Minimum ambient temp: -40°C after installation and only when cable is in a fixed position

Maximum conductor d.c. resistance:
Conductor size W/km at 20°C
1/0.80mm (0.5mm2) 36.8
16/0.20mm (0.5mm2) 39.7
1/1.13mm (1.0mm2) 18.4
7/0.53mm (1.5mm2) 12.3

Minimum insulation resistance: Individual conductors - 5000MW.Km at 20°C. Between individual screens - 1 MW.Km at 20°C

Maximum L/R ratio:
Conductor size µH/W
0.5mm2 25
1.0mm2 25
1.5mm2 40

Maximum capacitance unbalance: 250pF/250m at 1 kHz

Maximum mutual capacitance at 1 kHz: All unscreened and collectively screened (except one and two pairs) 0.5mm2 and 1.0mm2 - 75pF/m, 1.5mm2 - 85 pF/m. All individually screened pairs and one and two pair collectively screened 0.5mm2 and 1.0mm2 - 115pF/m, 1.5mm2 - 120 pF/m.

Spread of flame: Type 1 complies with BSEN 50265-2-1 Type 2 complies as Type 1 and additionally with IEC 332-3.

Minimum bending radius: Type 1 - 5 x overall diameter. Type 2 - 6 x overall diameter.


* Not suitable for connection to low impedance mains voltage