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BS EN 50288-7 Fire Resistant Multipair Instrumentation Cable, Individual and Overall Screened
Fire resistant multipair cable with individual pair screens and an overall screen. Mica glass tape, XLPE insulation and an LSZH sheath suit industrial instrumentation connections. Unarmoured design in separate 300V and 500V versions.
Fire Resistant Individual and Overall Screened Instrumentation Cables (Multipair).pdf Contact us
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APPLICATION

For industrial instrumentation circuits requiring individual screening of each signal pair as well as an overall screen. The unarmoured construction combines mica glass tape, XLPE insulation and an LSZH outer sheath for indoor equipment and instrument interconnections, including damp locations.

STANDARDS

Basic design to BS EN 50288-7 (formerly BS 5308)

FIRE PERFORMANCE

Circuit IntegrityIEC 60331-21; BS 6387 CWZ (Optional); BS EN 50200 (PH30/PH60/PH120)
Flame Retardance (Single Vertical Wire or cable test)IEC 60332-1-2; EN 60332-1-2
Reduced Fire Propagation (Vertically-mounted bundled wires & cables test)IEC 60332-3-24; EN 60332-3-24
Halogen FreeIEC 60754-1; EN 50267-2-1
No Corrosive Gas EmissionIEC 60754-2; EN 50267-2-2
Minimum Smoke EmissionIEC 61034-2; EN 61034-2

VOLTAGE RATING

300, 500V

CABLE CONSTRUCTION

ConductorPlain or metal coated copper wire, solid, stranded or flexible according to IEC 60228 class 1, 2 and class 5.
Fire BarrierMica glass tape.
InsulationExtruded XLPE compound according to EN 50290-2-29. LSZH, PE, PP compound can be offered as options.
PairsTwo insulated conductors uniformly twisted together with a lay not exceeding 100mm (≤1.5mm²) or 150mm (for 2.5mm²).
Individual ScreenAluminium/polyester tape is applied over each pair with metallic side down in contact with tinned copper drain wire, 0.5mm².
Binder TapePETP transparent tape.
Overall ScreenAluminium/polyester tape is applied over the laid up cores with metallic side down in contact with tinned copper drain wire, 0.5mm². Copper braid screen or aluminium/polyester tape combination with copper braid screen can be offered as option.
Outer SheathThermoplastic LSZH compound type LTS3 as per BS 7655-6.1 (Thermosetting LSZH compound type SW2-SW4 as per BS 7655-2.6 can be offered).
Outer Sheath OptionUV resistance, hydrocarbon resistance, oil resistance, anti-rodent and anti-termite properties can be offered as option.

COLOUR CODE

Insulation ColourColours and/or additional ring markings and/or symbols achieved by the use of coloured insulation or by a coloured surface using extrusion, printing or painting.
Outer SheathBlack. Other colours can be offered upon request.

PHYSICAL AND THERMAL PROPERTIES

Temperature range during operation-30°C - +90°C
Temperature range fixed installation-5°C - +50°C
Maximum short circuit temperature (5 Seconds)250°C
Minimum bending radius7.5 x Overall Diameter

ELECTRICAL PROPERTIES

300V

Conductor area sizemm²0.50.751.01.5
Insulation thickness (Nominal)mm0.40.40.40.5
Insulation thickness (Minimum)mm0.260.260.260.35
Conductor resistance (20°C)ohm/km36.725.018.512.3
Minimum Insulation resistance (20°C)Mohm/km1000
Maximum Mutual capacitancenf/km250
Capacitance Unbalancepf/500m500
Maximum l/R (ratio)μH/Ω25252540
Operating VoltageV300
Dielectric strength for 1 minuteACV≥1000
DCV≥2000

500v

Conductor area sizemm²0.50.751.01.52.5
Insulation thickness (nominal)mm0.60.60.60.60.7
Insulation thickness (minimum)mm0.440.440.440.440.53
Conductor resistance (20°C)ohm/km36.725.018.512.37.4
Minimum Insulation resistance (20°C)Mohm/km1000
Maximum Mutual capacitancenf/km250
Capacitance Unbalancepf/500m500
Maximum l/R (ratio)μH/Ω2525254060
Operating VoltageV500
Dielectric strength for 1 minuteACV≥2000
DCV≥3000

CONSTRUCTION PARAMETERS

300V

ConductorRE-2X(St)H PiMF...CI
No. of Pairs X Cross SectionClass of ConductorNominal Insulation ThicknessNominal Outer Sheath ThicknessApprox. Overall DiameterApprox. Weight
mm²　mmmmmmkg/km
0.5mm²
2x2x0.520.41.012.0138
3x2x0.520.41.012.7173
4x2x0.520.41.114.2222
5x2x0.520.41.115.6263
8x2x0.520.41.118.5377
10x2x0.520.41.222.2478
12x2x0.520.41.223.0545
16x2x0.520.41.325.8705
20x2x0.520.41.428.2865
24x2x0.520.41.532.51046
0.75mm²
2x2x0.7520.41.012.6155
3x2x0.7520.41.113.6206
4x2x0.7520.41.115.0253
5x2x0.7520.41.216.7312
8x2x0.7520.41.219.8449
10x2x0.7520.41.323.6567
12x2x0.7520.41.324.4648
16x2x0.7520.41.427.5839
20x2x0.7520.41.530.01028
24x2x0.7520.41.534.51221
1.0mm²
2x2x1.020.41.013.4177
3x2x1.020.41.114.4238
4x2x1.020.41.216.1304
5x2x1.020.41.217.7363
8x2x1.020.41.221.0528
10x2x1.020.41.325.1667
12x2x1.020.41.426.2782
16x2x1.020.41.529.41012
20x2x1.020.41.532.01220
24x2x1.020.41.636.91473
1.5mm²
2x2x1.520.51.115.2230
3x2x1.520.51.216.4309
4x2x1.520.51.218.1384
5x2x1.520.51.320.1472
8x2x1.520.51.324.0690
10x2x1.520.51.428.7870
12x2x1.520.51.529.91021
16x2x1.520.51.633.61323
20x2x1.520.51.736.71622
24x2x1.520.51.842.31955

500v

ConductorRE-2X(St)H PiMF...CI
No. of Pairs X Cross SectionClass of ConductorNominal Insulation ThicknessNominal Outer Sheath ThicknessApprox. Overall DiameterApprox. Weight
mm²　mmmmmmkg/km
0.5mm²
2x2x0.520.61.013.4157
3x2x0.520.61.114.5208
4x2x0.520.61.115.9254
5x2x0.520.61.217.7313
8x2x0.520.61.221.1447
10x2x0.520.61.325.2565
12x2x0.520.61.426.3660
16x2x0.520.61.529.5850
20x2x0.520.61.532.11018
24x2x0.520.61.637.01230
0.75mm²
2x2x0.7520.61.114.2184
3x2x0.7520.61.115.2233
4x2x0.7520.61.216.9297
5x2x0.7520.61.218.6353
8x2x0.7520.61.322.3523
10x2x0.7520.61.426.7660
12x2x0.7520.61.427.6754
16x2x0.7520.61.531.0972
20x2x0.7520.61.633.91190
24x2x0.7520.61.739.11436
1.0mm²
2x2x1.020.61.115.0207
3x2x1.020.61.216.2276
4x2x1.020.61.217.8340
5x2x1.020.61.319.8418
8x2x1.020.61.323.6605
10x2x1.020.61.428.2764
12x2x1.020.61.529.3893
16x2x1.020.61.633.01153
20x2x1.020.61.736.01411
24x2x1.020.61.841.61701
1.5mm²
2x2x1.520.61.116.0241
3x2x1.520.61.217.2324
4x2x1.520.61.319.2414
5x2x1.520.61.321.1496
8x2x1.520.61.425.4740
10x2x1.520.61.530.3932
12x2x1.520.61.631.51091
16x2x1.520.61.735.41410
20x2x1.520.61.838.71727
24x2x1.520.61.944.72080
2.5mm²
2x2x2.520.71.218.4324
3x2x2.520.71.319.8439
4x2x2.520.71.422.0563
5x2x2.520.71.524.5691
8x2x2.520.71.629.41033
10x2x2.520.71.735.11298
12x2x2.520.71.836.51519
16x2x2.520.71.941.01965
20x2x2.520.72.145.02434
24x2x2.520.72.251.92927


KEY FEATURES

  • Individual aluminium/polyester screens around each twisted pair.

  • A further overall foil screen surrounds the laid-up assembly.

  • Mica glass tape fire barrier, XLPE insulation and LSZH outer sheath.

SELECTION NOTES

Specify pair count, conductor area, conductor class and the 300V or 500V version. Plan individual and overall screen terminations to suit the connected equipment.

RELATED PRODUCTS

FREQUENTLY ASKED QUESTIONS

What does individual and overall screening mean?

Each pair has its own foil screen, and a second foil screen encloses the complete pair assembly.

Do the screens include drain wires?

The individual and overall screens use 0.5 mm² tinned copper drain wires.

Is this construction armoured?

This version is unarmoured; the related SWA version adds galvanised steel wire armour.

Which materials form the insulation system?

Mica glass tape provides the fire barrier and XLPE is the standard insulation.

What is the listed minimum bending radius?

The minimum bending radius is 7.5 times the overall cable diameter.

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