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BS EN 50288-7 Fire Resistant Multipair Instrumentation Cable, Overall Screened
Unarmoured fire resistant multipair instrumentation cable with mica glass tape, XLPE insulation, an overall foil screen and LSZH outer sheath. Separate 300V and 500V versions for industrial instrumentation and signal connections.
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APPLICATION

For paired signal connections between industrial instruments and electrical equipment. This fire resistant cable combines twisted pairs, mica glass tape and an overall foil screen within an LSZH sheath. The unarmoured construction is intended for indoor routes, including damp areas.

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).
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...CI
No. of Pairs X Cross SectionClass of ConductorNominal Insulation ThicknessNominal Outer Sheath ThicknessApprox. Overall DiameterApprox. Weight
mm²　mmmmmmkg/km
0.5mm²
1x2x0.520.60.97.465
2x2x0.520.40.910.8110
3x2x0.520.41.011.7146
4x2x0.520.41.012.9177
5x2x0.520.41.114.3218
8x2x0.520.41.117.0310
10x2x0.520.41.120.0380
12x2x0.520.41.220.9446
16x2x0.520.41.223.3560
20x2x0.520.41.325.5687
24x2x0.520.41.329.3815
0.75mm²
1x2x0.7520.40.97.773
2x2x0.7520.41.011.6133
3x2x0.7520.41.012.3168
4x2x0.7520.41.113.8215
5x2x0.7520.41.115.1255
8x2x0.7520.41.117.9366
10x2x0.7520.41.221.4463
12x2x0.7520.41.222.2529
16x2x0.7520.41.324.9685
20x2x0.7520.41.427.3840
24x2x0.7520.41.431.2997
1.0mm²
1x2x1.020.60.98.284
2x2x1.020.41.012.3155
3x2x1.020.41.113.3206
4x2x1.020.41.114.6254
5x2x1.020.41.116.0303
8x2x1.020.41.219.3452
10x2x1.020.41.222.8557
12x2x1.020.41.323.8654
16x2x1.020.41.426.7847
20x2x1.020.41.429.01021
24x2x1.020.41.533.51234
1.5mm²
1x2x1.520.50.99.1104
2x2x1.520.51.114.0203
3x2x1.520.51.114.9263
4x2x1.520.51.216.7338
5x2x1.520.51.218.3404
8x2x1.520.51.322.0605
10x2x1.520.51.426.3762
12x2x1.520.51.427.2876
16x2x1.520.51.530.61137
20x2x1.520.51.633.41395
24x2x1.520.51.738.51683

500v

ConductorRE-2X(St)H...CI
No. of Pairs X Cross SectionClass of ConductorNominal Insulation ThicknessNominal Outer Sheath ThicknessApprox. Overall DiameterApprox. Weight
mm²　mmmmmmkg/km
0.5mm²
1x2x0.520.60.98.274
2x2x0.520.61.012.3134
3x2x0.520.61.013.1168
4x2x0.520.61.114.6214
5x2x0.520.61.116.1253
8x2x0.520.61.219.3371
10x2x0.520.61.222.9456
12x2x0.520.61.323.9532
16x2x0.520.61.426.8685
20x2x0.520.61.429.1818
24x2x0.520.61.533.6991
0.75mm²
1x2x0.7520.60.98.582
2x2x0.7520.61.012.9151
3x2x0.7520.61.114.0200
4x2x0.7520.61.115.3245
5x2x0.7520.61.217.1301
8x2x0.7520.61.220.3430
10x2x0.7520.61.324.3544
12x2x0.7520.61.325.1620
16x2x0.7520.61.428.2800
20x2x0.7520.61.530.8979
24x2x0.7520.61.635.61183
1.0mm²
1x2x1.020.60.99.093
2x2x1.020.61.013.6173
3x2x1.020.61.114.7231
4x2x1.020.61.216.4295
5x2x1.020.61.218.0351
8x2x1.020.61.221.4507
10x2x1.020.61.325.6641
12x2x1.020.61.426.7751
16x2x1.020.61.530.0970
20x2x1.020.61.532.61167
24x2x1.020.61.637.61410
1.5mm²
1x2x1.520.60.99.5109
2x2x1.520.61.114.7214
3x2x1.520.61.215.8286
4x2x1.520.61.217.4354
5x2x1.520.61.319.4436
8x2x1.520.61.323.1635
10x2x1.520.61.427.6801
12x2x1.520.61.528.7938
16x2x1.520.61.632.31214
20x2x1.520.61.735.31487
24x2x1.520.61.840.71793
2.5mm²
1x2x2.520.71.010.9150
2x2x2.520.71.216.9293
3x2x2.520.71.218.0384
4x2x2.520.71.320.1493
5x2x2.520.71.422.4607
8x2x2.520.71.426.7894
10x2x2.520.71.632.11145
12x2x2.520.71.633.21321
16x2x2.520.71.737.31714
20x2x2.520.71.940.92130
24x2x2.520.72.047.22564


KEY FEATURES

  • Twisted copper pairs with mica glass tape and XLPE insulation.

  • One overall aluminium/polyester screen with a tinned copper drain wire.

  • LSZH outer sheath and PETP binder tape.

SELECTION NOTES

Choose the voltage version, number of pairs, conductor area and conductor class. Use the corresponding 300V or 500V table when comparing diameters and weights.

RELATED PRODUCTS

FREQUENTLY ASKED QUESTIONS

How are the signal pairs formed?

Two insulated conductors are uniformly twisted together to form each pair.

Where is the screen positioned?

The foil screen surrounds the complete laid-up pair assembly.

What is the standard insulation?

XLPE insulation is used with a mica glass tape fire barrier.

Which sheath is used?

The standard construction has a thermoplastic LSZH outer sheath.

How does the armoured version differ?

The related armoured multipair cable adds an inner sheath and galvanised steel wire armour for mechanical protection.

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