Lsf Wiring Cables

LSF – wiring cables Contents Introduction - Oman Cables Industry (SAOG)........................................................................................... 3 LOW SMOKE AND FUME (LSF) WIRING CABLE ................................................................................... 4 NOTES ON TYPICAL PROPERTIES OF LSF COMPOUND.................................................................... 5 Typical properties of LSF Thermosetting Insulation Compound Type EI 5................................................ 6 Typical Properties of LSF Thermosetting Insulation Compound Type EI5 ................................................ 7 Typical properties of Synthetic Sheathing compound Type LTS 4 ............................................................ 8 Materials, Construction and Identification ............................................................................................... 10 TUV CERTIFICATE................................................................................................................................ 11 LSF Wiring cable.................................................................................................................................... 12 Voltage ratings 300/500V, 450/750V to BS – 7211 – 98 ..................................................................... 12 Single Core Cables ................................................................................................................................ 13 Thermosetting insulated, non-sheathed cables 450/750V single core (rigid conductors) .................... 13 Thermosetting Insulated non-sheathed cables for internal wiring 300/500V single core...................... 14 Thermosetting insulated Synthetic sheathed cables 450/750 V single core ........................................ 14 Circular Multicore Cables ....................................................................................................................... 15 Thermosetting insulated synthetic sheathed non-flexible cable 450/750 V - 2, 3, 4 and 5 cores. ........ 15 Current ratings ....................................................................................................................................... 19 Rating Factors / Protection ..................................................................................................................... 20 Grouping / Installation ............................................................................................................................ 21 Oman Cables Quality Assurance............................................................................................................ 22 Short Circuit Curves ............................................................................................................................... 23

Last Revision Date: August 2005

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LSF – wiring cables Introduction - Oman Cables Industry (SAOG) Oman Cables Industry (SAOG) was established in 1984 and started commercial production of building Wires in 1987. Setting a 10 year target period to manufacture L.V. Power Cables, Control Cables, Low Smoke Flame Retarding (LSF/FRLS) Cables, Over Head Line Conductors and Flexible Cables for both domestic and export markets, OCI was able to fulfill the mission in merely 8 years. Today, OCI is the largest cable manufacturer in Sultanate of Oman. Beside local sales, OCI exports to all the GCC countries, the Middle East, the Far East, Vietnam, Yemen, U.K., Pakistan, etc. The company’s reputation, manufacturing capabilities, quality and reliability bagged it large orders from world renowned EPC contractors like Snamprogetti – Italy, Snamprogetti – France, Chiyoda-Foster – Japan/U.K. OCI, in a short span of time, has successfully made its mark in 4 continents of the world against tough international competition. OCI products are also approved and registered with Department of Electrical Services, Ministry of Development, Negara, Brunei Darussalam. Located in Rusayl, the Sultanate’s largest industrial complex, the company is equipped with ultra-modern Plant & Machinery. OCI gives you a choice in wires, cables and conductors as per British standards, IEC specification, MEW-UAE, WED-Abudhabi, DEWA-Dubai, MEW Bahrain, Ministry of Defence and to other national and international standards. In 1994 the company was accredited with the ISO 9002 certification in remarkably short period of 6 months in line with OCI’s proven capability to meet it’s challenges. Added to it, OCI is now accredited with the ISO 9001- design capabilities certification, which further bears testimony to OCI’s consistency in Quality Management. The company is also a proud recipient of His Majesty’s trophy for the Best Industry Award in the year 1991, 1992, 1996 and 1997 – a unique award for it’s achievements. Certificate of Honour for excellence in the year 1993, 1994, 1995, 1998, 1999 to 2000 were further awarded to OCI’s success. The company continues to enjoy the position of the top ten best performing companies in the Sultanate since and has shown a steep rise in growth. This demonstrates the confidence the customer has reposed in OCI. The company draws strength from its highly experienced staff, design & project management resources and stringent Quality Assurance procedures to deliver total commitment to quality, reliability, safety and customer satisfaction. OCI’s performance has attracted world renowned ‘DRAKA HOLDINGS NV’ – The Netherlands, one of the largest ‘Special Cables’ manufacturing group in the world to participate in it’s equity. With technical know-how and support of Draka Holdings, OCI is capable of displaying better growth and fostering customer satisfaction. As an affiliate of Draka Holding Organisation with operations in Europe, United States and the Far East, OCI is ideally positioned to service customers on both the national and global front. OCI offers combine unrivalled experience and a vast product range developed with the support, strength and resources of one of the world’s most significant cable companies. In the year 1999, OCI has successfully launched and started delivering solutions to the Instrumentation cables. Keeping in line with this success, the company has ventured into other hi-tech products, viz., special cables, Oil & Gas cables, etc., to its existing line of products. OCI is humbly proud of its efforts and success and believes success is not a destination but a journey. It will strive further to achieve even higher pinnacles of success and continue to offer better service and satisfaction to its distributors and end users. In this brochure we give details of the Low smoke and fire resistant cables and describe the various mechanical and enhanced fire performance characteristics of the insulation and sheathing compounds. OCI prides on its ability to offer products to each customer specific needs quickly, efficiently and with an assurance of product quality. Last Revision Date: August 2005

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LSF – wiring cables LOW SMOKE AND FUME (LSF) WIRING CABLE LSF cables combination of properties, which make it unique by reducing the threat to life and property. LSF wiring cables produce lower levels of smoke and corrosive gases under fire conditions. Resist Ignition Thus increasing the time before cables actually start burning. Reduce Propagation Being slow to burn, it reduces the immediate threat to the life and allows more time for evacuation. Do not contain halogen Therefore hydrochloric acid is not formed during fire. There is no threat of inhalation of this highly toxic chemical and cause no damage to the sensitive and costly equipments. Produce less smoke and noxious fumes Therefore do not inhibit vision, reduce disorientation and panic. With less smoke, visibility is not impaired and occupants locate the exit route and can evacuate safely with better visibility and fire-fighting personnel can extinguish fire quickly. The cables are suitable for operation at a sustained conductor temperature of 90°C maximum. These cables are suitable for using in areas of fire hazards or in areas like schools, hospitals, high rise building, public places, etc., where safety of human life against toxic gas is of prime importance. The LSF compound exhibits similar electrical and mechanical processing properties of PVC compounds but have been specifically developed to meet the requirements of International fire tests for cable design and material performance together with environmental benefits. Cables of wide range of bright colours can be formulated with LSF compound.

ITAL EXTRUDER

Last Revision Date: August 2005

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LSF – wiring cables NOTES ON TYPICAL PROPERTIES OF LSF COMPOUND Oxygen Index (ASTM-D-2863) The criteria for burning in the presence of percentage for oxygen in air. By mixing oxygen and nitrogen at various percentages, this test finds at what percentage of oxygen the standard specimen starts burning. Higher the oxygen index higher the resistance to get ignited. Minimum oxygen index shall be 30%. Temperature Index (ASTM-D-2863) Temperature index is the temperature at which the oxygen index of the material becomes 21. This test is carried out usually by extrapolation method after the oxygen index is measured at the room temperature. Smoke Density (ASTM-D-2843) This parameter relates to measuring and observing relative amounts of smoke produced by the burning or decomposition of materials. This test is carried out in accordance with ASTM D-2843. The measurements are made in terms of loss of light transmission through a collected volume of smoke produced under control-standardized conditions. Acid Gas Emission (IEC-754-1) During burning of cable materials, acid gases are evolved, especially hydrogen chloride. The gas emission is evaluated in accordance with test method IEC 754-1, where approximately 1gm. for the material is pyrolysed at 800°C in a combustion tube and resultant gases analyzed.

Oxygen Index Test as per ASTM-D-2863

Last Revision Date: August 2005

Smoke density chamber as per ASTM-D-2843

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LSF – wiring cables Typical properties of LSF Thermosetting Insulation Compound Type EI 5 PROPERTIES

SPECIFICATION

Maximum operating Temperature of conductor Properties in the state as Manufactured

BS 7655 Section 5.1

BS 7655 Section 5.1

Minimum Tensile Strength Minimum Elongation at break Properties after aging in Air oven Temperature Duration

BS 7655 Section 5.1

Maximum variation in tensile strength Maximum variation in elongation at break Bending test at low temperature

Minimum elongation break (%). Impact test at low temperature

BS 7655 Section 5.1

°C

90

N/mm²

10

%

125

°C

135

Hours

168

%

30

%

30

°C

-15 ± 2 (No cracks)

°C

without

Duration

BS 7655 Section 5.1

BS 7655 Section 5.1

Ozone concentration Alternative Ozone resistance test Temperature Duration Ozone concentration Last Revision Date: August 2005

-15 ± 2 (No cracks) 30

Temperature Ozone Resistance Test Temperature

TYPICAL VALUE

BS 7655 Section 5.1

Temperature Elongation test at low temperature Temperature

UNIT

BS 7655 Section 5.1

°C

-15 ± 2 (No cracks)

°C

25 ± 2

Hours

24

ppm

250 to 300 (No cracks)

o

C

40±2

Hours

72

ppm

200 ± 50 (No cracks) Page 6 of 23

LSF – wiring cables Typical Properties of LSF Thermosetting Insulation Compound Type EI5 PROPERTIES

SPECIFICATION

UNIT

TYPICAL VALUE

Hot set test o

Temperature Duration Mechanical

200 ± 3

C

BS 7655 Section 5.1

Minutes N/mm

2

15 0.2

Maximum elongation under load

%

100

Maximum elongation after unloading Pressure test at high temperature

%

25

Temperature

BS 7655 Section 5.1

Maximum indention

o

C

100 ± 2

%

50

Acidic gases evolved pH (minimum) Conductivity (maximum)

Last Revision Date: August 2005

4.3

BS 7655 Section 5.1 µs/mm

10

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LSF – wiring cables Typical properties of Synthetic Sheathing compound Type LTS 4 PROPERTIES

SPECIFICATION

Maximum operating temperature of conductor Properties in the state as manufactured

UNIT

TYPICAL VALUE

o

C

90

N/mm2

10

Minimum Elongation at break Properties after aging in air oven

%

100

Temperature

o

100 ± 2

BS 7655 Section 6.1

BS 7655 Section 6.1

Minimum Tensile Strength

C

Duration

BS 7655 Section 6.1

Minimum tensile strength

Hours N/mm

2

168 10

Maximum variation

%

40

Maximum elongation at break Bedding test at low temperature

%

100

o

-15 ± 2(No cracks)

o

C

-15 ± 2

%

30

o

-15 ± 2(No cracks)

o

C

90 ± 2

Maximum indentation Water immersion test

%

50

Temperature

o

70 ± 2

BS 7655 Section 6.1

Temperature Elongation test at low temperature

C

BS 7655 Section 6.1

Temperature Minimum elongation without break Impact test at low temperature

BS 7655 Section 6.1 C

Temperature Pressure test at high temperature BS 7655 Section 6.1

Temperature

C

Duration Maximum strength

variation

of

tensile

Maximum variation of elongation at break

Last Revision Date: August 2005

BS 7655 Section 6.1

Hours

168

%

30

%

30

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LSF – wiring cables Typical properties of Synthetic Sheathing compound Type LTS4 PROPERTIES

SPECIFICATION

UNIT

TYPICAL VALUE

Acidic (corrosive) gases evolved HCL Level

BS7211

%

≤0.5

Fire & Smoke test properties Oxygen Index Temperature

ASTM D – 2863

o

C

ASTM D – 2863

>30 >250

PS Coiler

Last Revision Date: August 2005

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LSF – wiring cables Materials, Construction and Identification

Identification st

st

From 1 April 2006 Cable type

Insulation Colour

PVC insulated nonsheathed (figs 1 and 2)

Red, black, white, blue, brown, grey, green/yellow, orange, pink, turquoise, violet Two core: Brown & Blue * Three core: Brown, Black & Grey

PVC insulated, PVC sheathed (light non-flexible cable with extruded inner covering) (Fig 4)

PVC insulated, Two core: Brown & Blue * PVC sheathed Three core: Brown, Black & (fig 3, 5 and 6) Grey * For 2 x 1.0 & 2 x 1.5 cables, Brown and Brown

Last Revision Date: August 2005

Valid till 31 March 2006

Sheath colour -

Grey

Grey

Insulation colour

Sheath colour

Red, black, white, blue, brown, grey, green/yellow, orange, pink, turquoise, violet Two core: red and black Black or grey Three core: red, yellow and blue Four core: red, yellow, blue and black Five core: red, yellow, blue, black and green/yellow Single core: red or black Grey or white Two core: red and black

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LSF – wiring cables TUV CERTIFICATE

Last Revision Date: August 2005

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LSF – wiring cables LSF Wiring cable Voltage ratings 300/500V, 450/750V to BS – 7211 – 98 The non-sheathed general-purpose cables are rated at 450/750V(450V to earth, 750V A.C. between Conductors). All other types are rated at 300/500V to earth, 500V between conductors.

Copper Conductor Construction TABLE – 1 Nominal conductor area (mm²) 0.5 0.75 1.0 1.5 1.5 2.5 2.5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630

Conductor class 1 1 1 2 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2

Nominal diameter of conductor (mm) 0.80 1.00 1.13 1.50 1.38 1.78 2.01 2.52 3.10 4.00 4.70 5.90 7.00 8.10 9.70 11.5 12.9 14.3 16 18.4 20.6 23.3 26.3 30.0

Maximum D. C. resistance of Plain Copper conductor at 20 °C (Ω Ω/km) 36.00 24.50 18.1 12.1 12.1 7.41 7.41 4.61 3.08 1.83 1.15 0.727 0.524 0.387 0.268 0.193 0.153 0.124 0.0991 0.0754 0.0601 0.0470 0.0366 0.0283

NOTE: PLAIN ANNEALED COPPER CONDUCTOR CLASS 1 SOLID OR CLASS 2 STRANDED CIRCULAR COMPACTED OR NON-COMPACTED AS PER BS-6360

Last Revision Date: August 2005

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LSF – wiring cables Single Core Cables Thermosetting insulated, non-sheathed cables 450/750V single core (rigid conductors) Harmonized standard designation Solid conductor HO7Z – U Stranded conductor HO7Z – R

TABLE – 2 Nominal conductor area (mm²) 1.5 1.5 2.5 2.5 4 4 6 6 10 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630

Class of conductor 1 2 1 2 1 2 1 2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2

Radial Thickness of insulation (mm) 0.7 0.7 0.8 0.8 0.8 0.8 0.8 0.8 1.0 1.0 1.0 1.2 1.2 1.4 1.4 1.6 1.6 1.8 2.0 2.2 2.4 2.6 2.8 2.8

Maximum overall diameter (mm) 3.3 3.4 4.0 4.1 4.6 4.7 5.2 5.4 6.6 7.0 8.0 10.1 11.3 13.2 15.1 17.6 19.6 21.6 24.1 27.5 30.6 34.3 38.2 42.50

Approximate weight (kg/km) 21 21 32 32 46 47 64 66 105 110 170 260 350 480 680 930 1160 1430 1740 2270 2840 3640 4650 5940

CONSTRUCTION: PLAN ANNEALED COPPER CONDUTOR. CLASS 1 SOLID CONDUCTOR OR CLASS 2 STRANDED CONDUCTOR AS PER TABLE 1. AND THERMOSETTING INSULATED

Last Revision Date: August 2005

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LSF – wiring cables TABLE 2-A Thermosetting Insulated non-sheathed cables for internal wiring 300/500V single core. Harmonized standard designation HO5Z-U Nominal area of conductor (mm²)

Nominal diameter of wire (mm)

Radial thickness of insulation (mm)

Maximum overall diameter (mm)

Approximate weight (kg/km)

0.5

1/0.80

0.6

2.4

8.6

0.75

1/1.00

0.6

2.6

11.0

1.0

1/1.13

0.6

2.8

14.0

TABLE – 3 Thermosetting insulated Synthetic sheathed cables 450/750 V single core Conductor as per table 1 Nominal area of conductor (mm²)

Conductor class

Radial thickness of insulation (mm)

Radial thickness of sheath (mm)

Overall diameter maximum (mm)

Approximate Weight (kg/km)

1.0

1

0.7

0.8

4.8

28

1.0

2

0.7

0.8

4.9

28

1.5

1

0.7

0.8

5.0

36

1.5

2

0.7

0.8

5.2

36

2.5

1

0.7

0.8

5.5

50

2.5

2

0.7

0.8

5.6

51

4

1

0.7

0.8

6.0

72

4

2

0.7

0.9

6.4

75

6

1

0.7

0.9

6.8

95

6

2

0.7

0.9

7.1

98

10

2

0.7

0.9

8.1

150

16

2

0.7

0.9

9.2

220

25

2

0.9

1.0

11.4

300

35

2

0.9

1.1

12.8

400

Last Revision Date: August 2005

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LSF – wiring cables Circular Multicore Cables Thermosetting insulated synthetic sheathed non-flexible cable 450/750 V - 2, 3, 4 and 5 cores. Conductor as per table 1. TWO CORE

TABLE – 4 Cable size (No x mm²)

Radial thickness of insulation (mm)

Conductor class

Thickness of inner covering (mm)

Radial thickness of sheath (mm)

Overall diameter maximum. (mm)

2 x 1.0

0.7

1

0.4

1.2

9.5

2 x 1.0

0.7

2

0.4

1.2

9.7

2 x 1.5

0.7

1

0.4

1.2

10.1

2 x 1.5

0.7

2

0.4

1.2

10.3

2 x 2.5

0.7

1

0.4

1.2

11.0

2 x 2.5

0.7

2

0.4

1.2

11.3

2x4

0.7

1

0.4

1.2

12.1

2x4

0.7

2

0.4

1.2

12.4

2x6

0.7

1

0.4

1.2

13.2

2x6

0.7

2

0.4

1.2

13.7

2 x 10

0.7

1

0.4

1.4

15.5

2 x 10

0.7

2

0.6

1.4

16.7

2 x 16

0.7

2

0.6

1.4

18.8

2 x 25

0.9

2

0.8

1.4

23.2

2 x 35

0.9

2

0.8

1.6

26.0

Last Revision Date: August 2005

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LSF – wiring cables THREE CORE

TABLE –5 Cable size (No x mm²)

Radial thickness of insulation (mm)

Conductor class

Thickness of inner covering (mm)

Radial thickness of sheath (mm)

Overall diameter maximum. (mm)

3 x 1.0

0.7

1

0.4

1.2

10.0

3 x 1.0

0.7

2

0.4

1.2

10.2

3 x 1.5

0.7

1

0.4

1.2

10.6

3 x 1.5

0.7

2

0.4

1.2

10.9

3 x 2.5

0.7

1

0.4

1.2

11.6

3 x 2.5

0.7

2

0.4

1.2

11.9

3x4

0.7

1

0.4

1.2

12.7

3x4

0.7

2

0.4

1.2

13.1

3x6

0.7

1

0.4

1.2

14.0

3x6

0.7

2

0.4

1.4

15.0

3 x 10

0.7

1

0.6

1.4

16.9

3 x 10

0.7

2

0.6

1.4

17.5

3 x 16

0.7

2

0.6

1.4

19.9

3 x 25

0.9

2

0.8

1.4

24.7

3 x 35

0.9

2

0.8

1.6

27.6

Last Revision Date: August 2005

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LSF – wiring cables FOUR CORE

TABLE – 6 Cable size (No x mm²)

Radial thickness of insulation (mm)

Conductor class

Thickness of inner covering (mm)

Radial thickness of sheath (mm)

Overall diameter maximum. (mm)

4 x 1.0

0.7

1

0.4

1.2

11.2

4 x 1.0

0.7

2

0.4

1.2

11.5

4 x 1.5

0.7

1

0.4

1.2

11.4

4 x 1.5

0.7

2

0.4

1.2

11.7

4 x 2.5

0.7

1

0.4

1.2

12.6

4 x 2.5

0.7

2

0.4

1.2

12.8

4x4

0.7

1

0.4

1.2

13.8

4x4

0.7

2

0.4

1.2

14.0

4x6

0.7

1

0.4

1.4

15.7

4x6

0.7

2

0.6

1.4

16.7

4 x 10

0.7

1

0.6

1.4

18.4

4 x 10

0.7

2

0.6

1.4

19.2

4 x 16

0.7

2

0.6

1.4

21.8

4 x 25

0.9

2

0.8

1.6

27.5

4 x 35

0.9

2

1.0

1.6

30.7

Last Revision Date: August 2005

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LSF – wiring cables FIVE CORE

TABLE – 7 Cable size (No x mm²)

Radial thickness of insulation (mm)

Conductor class

Thickness of inner covering (mm)

Radial thickness of sheath (mm)

Overall diameter maximum. (mm)

5 x 1.0

0.7

1

0.4

1.2

11.5

5 x 1.0

0.7

2

0.4

1.2

11.9

5 x 1.5

0.7

1

0.4

1.2

12.3

5 x 1.5

0.7

2

0.4

1.2

12.6

5 x 2.5

0.7

1

0.4

1.2

13.6

5 x 2.5

0.7

2

0.4

1.2

13.9

5x4

0.7

1

0.4

1.4

15.5

5x4

0.7

2

0.6

1.4

16.4

5x6

0.7

1

0.6

1.4

17.5

5x6

0.7

2

0.6

1.4

18.1

5 x 10

0.7

1

0.6

1.4

20.0

5 x 10

0.7

2

0.6

1.4

20.9

5 x 16

0.7

2

0.8

1.4

24.2

5 x 25

0.9

2

1.0

1.6

30.5

5 x 35

0.9

2

1.0

1.6

33.6

Last Revision Date: August 2005

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LSF – wiring cables Current ratings Maximum operating temperature is 90 °C. Current ratings and rating factors are in accordance with the relevant table of the IEE Regulations for the Electrical Equipment of Buildings. SINGLE CIRCUIT CURRENT RATINGS

TABLE – 8 Single core insulated cables, non-armoured, with or without sheath (Copper conductors) As per IEE wiring regulation-16th Current-carrying capacity (Amperes):

Ambient temperature: 30 °C

Conductor operating temperature: 90 °C Clipped direct In air Vertical flat Trefoil spaced 3 or 4 cables 2 cables single 3 cables trefoil 2 cables 3 or 4 2 cables three-phase phase a.c or cables three single phase three phase single a.c phase a.c or phase a.c a.c or d.c flat a.c flat and d.c or3 cables three-phase and touching touching or d.c a.c trefoil 13.5 12 15.5 14 17.5 15.5 20 18 24 21 27 25 32 28 37 33 41 36 47 43 57 50 65 59 76 68 87 79 101 89 114 104 130 110 125 110 141 129 162 137 151 134 182 167 197 167 192 171 234 214 254 216 232 207 284 261 311 264 269 239 330 303 362 308 300 262 381 349 419 356 341 296 436 400 480 409 400 346 515 472 569 485 458 394 594 545 659 561 546 467 694 634 795 656 262 533 792 723 920 749 720 611 904 826 1070 855 1030 943 1188 971 1154 1058 1337 1079

Conductor cross Enclosed in conduit on a sectional area wall or in trunking etc. mm²

1 1.5 2.5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630 800 1000

Last Revision Date: August 2005

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LSF – wiring cables Rating Factors / Protection Rating Factors The tabled ratings must be reduced for ambient air temperatures higher than 300C, appropriate temperature ratings factors are as follows:RATING FACTORS For ambient temperature other than 50oC, tabulated ratings shall be adjusted by factors as follows: Ambient Temperature (oC ) Thermo setting compound EI 5 insulated (90 oC)

25

30

35

40

45

50

55

1.04

1.00

0.96

0.91

0.87

0.82

0.76

Protection Coarse excess-current protection is defined as that which will not operate within four hours at 1.5 times the load current of the circuit, which it protects. Current ratings given for course excess-current protection may be increased by 1.33 when close excess-current protection may be assured. Close excess-current protection operates within four hours at 1.5 times the load current which it protects. Current ratings given for close excess-current protection must be decreased by a factor of 0.75 when coarse excess current protection is used.

Production Facility

Last Revision Date: August 2005

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LSF – wiring cables Grouping / Installation Grouping CONDUIT AND SINGLE CORE CABLES For groups of circuits unenclosed, the single circuit rating apply provided that; 1. The horizontal clearance between circuits is; a. Not less than six times the overall diameter of an individual cable and b. Not less than the overall width of an individual circuit - except that the horizontal clearance need not in any case exceed 150 mm. 2. The vertical clearance between circuits is not less than 150 mm. 3. If the number of circuits exceeds four, they are installed in a horizontal plane. In all other cases, unless a more precise evaluation of current rating has been made based on experimental work or calculated data, the following factors are applicable. Correction factors for groups of more than one circuit of single-core cables, or more than one multicore cable. th

As per IEE Wiring regulation - 16

Correction factor (Cg) Number of circuits or multicore cables 5 6 7 8 9 10 12 14

2 3 4 16 18 20 Enclosed or bunched and clipped direct to a non-metallic 0.80 0.70 0.65 0.60 0.57 0.54 0.52 0.50 0.48 0.45 0.43 0.41 0.39 0.38 surface. Single layer clipped to a nonmetallic surface

Touching

0.85 0.79 0.75 0.73 0.72 0.72 0.71 0.70

Spaced*

0.94 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90 0.90

Single layer multicore touching on a ladder support

0.86 0.82 0.80 0.79 0.78 0.78 0.78 0.77

--

--

--

--

--

--

--

--

--

--

--

--

* Spaced by clearance between adjacent surfaces of a least one cable diameter (De). Where the horizontal clearances between adjacent cables exceeds 2 De, no correction factor need be applied.

Installation At temperatures of about -10oC, LSF cables begin to stiffen and should not be bent sharply or struck at these lower temperatures. Prior to installation, cables should be stored for at least 24 hours in a warm place. Low temperatures have no harmful effect; cables regain their normal flexibility at higher temperatures. Cables should be installed in accordance with the appropriate installation authority regulations. Bending radius (minimum internal radius of bend) For cables up to 10 mm diameter or minor dimension, three times the diameter or minor dimension. For cables 10 to 25 mm diameter or minor dimension, four times the diameter or minor dimension For cables exceeding 25 mm diameter or minor dimension, fix times the diameter or minor dimension

Last Revision Date: August 2005

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LSF – wiring cables Oman Cables Quality Assurance In order to ensure Quality Assurance, it is extremely essential to test and inspect the product at raw material stage, at each stage of manufacturing and finished product stage.

OMAN CABLES have the following Quality Assurance System. A. Raw-materials inspection B. In-process inspection C. Finished product inspection Raw-Materials inspection All the raw materials are procured only from internationally approved companies known for their quality products based on OCI’s raw material specifications. On receipt at OCI, the materials are tested and inspected by Oman Cables quality team. All materials are accompanied by manufacturer’s test certificate. Only those materials, which meet Oman Cables raw material specification, are released for production. In-Process Inspection Teams of well-experienced and qualified personnel, dedicated to quality, inspects and test all the inprocess materials at every stage and on 100% compliance are released for next process. Finished Product Inspection Oman Cables products undergo routine and type tests according to the relevant standards before transfer to warehouse. Routine tests are carried out for conformity to specifications. These are intended to confirm to design and quality parameter. Various type tests are conducted lot-wise at regular frequency on sampling basis to determine the dimensional, physical, environmental and electrical acceptance.

Quality Assurance Laboratory

Last Revision Date: August 2005

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LSF – wiring cables Short Circuit Curves SHORT CIRCUIT CURRENT CURVES FOR COPPER CONDUCTOR, THERMOSETTING (TYPE EI-5) INSULATED LSF WIRES

Last Revision Date: August 2005

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