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BS5308 Part 1 / Type 1 (unarmoured cables)
BS5308 Cable Part 1 Type1 MG-XLPE-OS-LSOH

Application

The unarmoured fire resistant versions (Part 1 Type 1) are typically used in chemical and process industries where there is danger of fire.

Construction

BS5308 Cable Part 1 Type1 MG-XLPE-OS-LSOH

Conductor Annealed 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, 0.5mm²
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

Mechanical and Electrical Properties

Operating temperature: -20˚C up to + 90˚C( fixed installation) 0˚C to +50˚C(during operation )
Minimum bending radius: 5 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 0.43 7 x 0.53
Conductor resistance max ohm/km 39 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 115 115 115 115
Max. Mutual Capacitance @ 1 kHz IS/OS cables (include 1 pair and 2 pair) pF/m 75 75 75 75
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 Sheath
no./mm mm2 mm mm
1 7/0.43 1 0.6 1.4
2 7/0.43 1 0.6 1.4
5 7/0.43 1 0.6 1.4