Authorized distributor of top-quality MEP related products with 7 branches across the UAE.
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Company Profile
Notes on the use of PVC Insulated Wires/Cables
Notes on the use of LSF Insulated Wires/Cables
Materials, construction and identification
Copper Conductor Construction – Table 1
Copper / PVC Single Core , non-sheathed cables – dimensions & weights – Table 2 & 2 A
Copper / LSF Single Core non-sheathed cables – dimensions & weights – Table 3 & 3 A
Single Core – CU / PVC / PVC 300/500 Volts – Table 4
Single Core – CU / XLPE / LSF or CU / LSF / LSF 450/750 Volts – Table 5
Current rating & voltage drop – For 70 0 C PVC Insulated Cables – Table 6 & 6A Current rating & voltage drop – for 90 0 C Thermosetting insulated (XLPE or LSF) Cables – Table 7 & 7A
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Page 14 Page 15 Page 15 Page 16 Page 17 Page 18
Installation methods for wires/cables – Table 8
Rating Factors – Table 9
Group rating factors – Table 10
General Installation Guidelines
Special Guidelines for LSF Insulated / Sheathed Cables
Oman Cables Quality Assurance
Company Profile
The manufacturing facilities are situated within the largest industrial complex in Muscat, The Sultanate of Oman, with its offices and factory presently occupying an area of 135000 sqm with future expansion plans inmind. OCI have equivalent facilities in Sohar, Oman at its Aluminum manufacturing facility and together has a capacity of copper and aluminum of more than 120,000 MT annually. Oman Cables Industry (SAOG) has its offices in Oman, UAE, Qatar, and KSA and has an extensive network of distributors and agents throughout MENA, Asia and Europe.
Oman Cables Industry (SAOG) develops, manufactures and markets a totally integrated variety of electrical products, which include medium voltage power cables, low voltage power and control cables, pilot cables, overhead power transmission line conductors and building wires . OCI offers cables with special features suitable for different types of applications, environmental conditions or as per customer requirement. Flame retardant properties Low smoke and fume (LSF) properties Cables with anti-termite sheaths UV resistant outer sheath Lead sheath
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Notes on the use of PVC Insulated Wires / Cables as per BS 6004/ BS EN 50525-2-31
Polyvinyl Chloride (PVC) Compounds
Sheath colours are normally grey, black or white. Other colours can be provided on special order but experience has shown that for outdoor use, black colour has the highest resistance to direct sunlight, with other colour tending to fade in the time under these conditions.
PVC compounds used in wires and cables as per BS 6004/BS EN 50525-2-31, are described in BS EN 50363-3 / BS 7655-4.2 Several grades of compounds are detailed in these standards for both insulation and sheathing requirements. PVC compounds are thermoplastic by nature and consequently are designed to operate within a prescribed temperature range. Grades of PVC can therefore be selected to suit particular environment temperatures, with the maximum conductor temperature for heat resisting grade PVC being 90 0 C and the lowest operating temperature grade PVC below minus 30 0 C. Oman Cables also offer LSF and FRLS cables, suitable for use in fire hazards areas or where safety of human life against toxic gases is of prime importance. The majority of wiring installations, however, use a general purpose grade of PVC which has a maximum conductor operating temperature of 70 0 C; this grade of PVC wires should not be installed or flexed when the air temperature is nearing 0 0 C. A wide range of bright colours can be formulated with PVC compounds.
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Notes on the use of LSF Insulated Wires/Cables as per BS 7211/BS EN 50525-3-41 LSF Compound LSF Compound used in wires as per BS 7211/BS EN 50525-3-41 is Thermosetting Insulation suitable for operating temperature of 90 0 C, Type EI5 to BS EN 50363-5. PVC when burnt emits large quantities of dense black smoke and acid gas, and in addition to the debilitating effect of smoke and toxic fume inhalation, obscuration of fire safety exits delays or prevents escape. Improved PVC formulations producing less smoke and acid gas have been developed but still do not satisfy required emission levels. The demand therefore has been for materials to replace PVC which do not give off smoke and toxic fumes and do not contain halogens. The materials need to have the following characteristics:- a) Fire retardant and zero halogen b) Low emission of smoke, toxic fumes and acid gases during combustion c) Similar mechanical and electrical properties to PVC d) Acceptable process-ability e) Low additional cost Detailed properties of the above material are Halogen Content – Max 0.5% pH value –Minimum 4.3 Conductivity – maximum 10 micro Siemens/mm Comparison of Chemical Resistance Properties of LSF and PVC Properties PVC LSF Oxidation Resistance E E Heat Resistance G-E G Oil Resistance F P Low-Temperature Flexibility P-G F-G Weather, Sun Resistance G-E P Ozone Resistance E E Abration Resistance F-G F Electrical Properties F-G F Flame Resistance G E Nuclear Radiation Resistance F G Water Resistance F-G F Acid Resistance G-E G Alkali Resistance G-E G Aliphatic Hydrocarbons Resistance P P Aromatic Hydrocarbons Resistance P-F P Halogenated Hydrocarbons Resistance P-F P Alcohol Resistance P-F G Underground Burial P-G F-G Legend : E = Excellent, G = Good, P = Poor, F = Fair
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Materials, construction and identification
CU/PVC or CU/LSF Wire
CU/PVC/PVC or CU/LSF/LSF or CU/XLPE/LSF Cables
Conductor
Insulation
Sheath
Plain Copper
PVC or LSF or XLPE
PVC or LSF
(Solid or Stranded)
(Coloured)
(Coloured)
OCI can provide all colours as mentioned in applicable standards for Insulation & for Sheath.
Note: LSF means Low Smoke & Fumes. It is also known as LSOH or LSZH. Therefore word ‘LSF’ wherever appeared in this catalogue can be considered as LSOH or LSZH.
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Copper Conductor Construction Table 1
Maximum conductor resistance (d.c.) at 20 0 C per km for Plain Annealed copper conductor (in ohm / km)
Minimum number of wires
Nominal diameter of conductor (mm)
Nominal Conductor Area (mm 2 )
1.0
1*
1.13
18.1
1.5
7
1.59
12.1
1.5
1*
1.38
12.1
2.5
1*
1.78
7.41
2.5
7
2.01
7.41
4
7
2.52
4.61
6
7
3.12
3.08
10
7
4.00
1.83
16
6
4.80
1.15
25
6
5.90
0.727
35
6
6.90
0.524
50
6
8.10
0.387
70
12
9.70
0.268
95
15
11.40
0.193
120
18
12.90
0.153
150
18
14.30
0.124
185
30
16.00
0.0991
240
34
18.40
0.0754
300
34
20.60
0.0601
400
53
23.30
0.047
500
53
26.30
0.0366
630
53
30.00
0.0283
800
53
34.14
0.0221
1000
53
38.20
0.0176
* Solid Conductor
Note: Plain annealed copper conductor class 1 solid or class 2 stranded circular compacted or non- compacted as per BS EN 60228.
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Single Core Cables (CU/PVC) Table 2 PVC insulated, non-sheathed general purpose cables 450/750 V single core (rigid conductor) as per BS EN 50525-2-31 Harmonized standard designation Solid conductor H07V-U Stranded conductor H07V-R
Nominal conductor area mm 2
Class of conductor
Nominal Radial Thickness of insulation mm
Maximum Overall diameter mm
Approximate weight kg/km
1.5 1.5 2.5 2.5
1 2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
0.7 0.7 0.8 0.8 0.8 0.8 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 2.8 3.0
3.2 3.3 3.9 4.0 4.6 5.2 6.7 7.8 9.7
21 21 32 32 47 66
4 6
10 16 25 35 50 70 95
110 170 260 350 480 680 930
10.9 12.8 14.6 17.1 18.8 20.9 23.3 26.6 29.6 33.2 36.9 41.1 45.7 51.0
120 150 185 240 300 400 500 630 800
1160 1430 1740 2270 2840 3640 4650 5940 7780 9635
1000
Table 2 - A PVC Insulated non-sheathed cable for internal wiring 300/500 V single core as per BS EN 50525-2-31. Harmonized standard designation H05V-U Nominal conductor
Class of conductor
Nominal Radial Thickness of insulation mm
Maximum Overall diameter mm
Approximate weight kg/km
area mm 2
0.5
1 1
0.6 0.6 0.6
2.3 2.5 2.7
9
0.75 1.00
11
1 14 Construction (Table 2 & 2-A) : Plain annealed copper conductor, class 1 solid conductor, or class 2 stranded conductor, as per Table 1, PVC Insulation (Type TI -1 for 70 0 C operating temperature)** ** We can also provide HRPVC, Type TI -3 insulated non-sheathed cables (suitable for 90 0 C operating temperature)
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Single Core Cables (CU/LSF) Table 3 Thermosetting (LSF) insulated, non-sheathed cables 450/750 V Single core (rigid conductors) as per BS EN 50525-3-41 Harmonized standard designation Solid conductor H07Z-U Stranded conductor H07Z-R Nominal conductor
Class of conductor
Nominal Radial Thickness of insulation mm
Maximum Overall diameter mm
Approximate weight kg/km
area mm 2
1.5 1.5 2.5 2.5
1 2 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
0.7 0.7 0.8 0.8 0.8 0.8 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
3.3 3.4 4.0 4.1 4.7 5.4 7.0 8.0
21 21 32 32 47 66
4 6
10 16 25 35 50 70 95
110 170 260 350 480 680 930
10.1 11.3 13.2 15.1 17.6 19.4 21.6 24.1 27.5 30.6 34.3 38.2 42.5
120 150 185 240 300 400 500 630
1160 1430 1740 2270 2840 3640 4650 5940
Table 3 - A Thermosetting (LSF) Insulated non-sheathed cable for internal wiring 300/500 Volts single core as per BS EN 50525-3-41. Harmonized standard designation H05Z-U Nominal conductor
Class of conductor
Nominal Radial Thickness of insulation mm
Maximum Overall diameter mm
Approximate weight kg/km
area mm 2 0.50 0.75 1.00
1 1
0.6 0.6 0.6
2.4 2.6 2.8
9
11
1 14 Construction (Table 3 & 3-A) : Plain annealed copper conductor - Class 1 solid conductor or class 2 stranded conductor, as per Table 1, Thermosetting (LSF) insulation (Type EI5 for 90 0 C operating temperature)
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Single Core Cables (CU/PVC/PVC) Table 4 Plain annealed copper conductor as per Table 3, PVC insulated, PVC sheathed cable 300/500 V single core as per BS 6004 Nominal conductor area Overall diameter Maximum
Nominal Radial Thickness of insulation mm
Nominal Radial Thickness of sheath mm
Approximate weight
mm 2
mm
kg/km
1*
0.6
0.8
4.5
28
1.5*
0.7
0.8
5.0
36
2.5*
0.8
0.8
5.7
51
4
0.8
0.9
6.7
75
6
0.8
0.9
7.3
98
10
1.0
0.9
8.8
150
16
1.0
1.0
10.1
220
25
1.2
1.1
12.1
300
35
1.2
1.1
13.5
400
* Solid Conductor
Single Core Cables (CU/XLPE/LSF or CU/LSF/LSF) Table 5
Plain annealed Copper Conductor as per Table 1, Thermosetting insulated (XLPE or LSF), LSF sheathed cables 450/750 V single core as per BS 7211 Nominal conductor area
Nominal Radial Thickness of insulation mm
Nominal Radial Thickness of sheath mm
Overall diameter Maximum
Approximate weight
mm 2
mm
kg/km
1*
0.7
0.8
4.8
28
1.5
0.7
0.8
5.2
36
2.5
0.7
0.8
5.6
51
4
0.7
0.9
6.4
75
6
0.7
0.9
7.1
98
10
0.7
0.9
8.1
150
16
0.7
0.9
9.2
220
25
0.9
1.0
11.4
300
35
0.9
1.1
12.8
400
* Solid Conductor
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Table - 8 Installation Methods for Wires/Cables
Examples
Description
Reference Method to be used to determine current carrying capacity
Non-sheathed cables in conduit in a thermally insulated wall with an inner skin having a thermal conductance of not less than 10 W/m 2 K Non-sheathed cables in a conduit on a wooden or masonry wall or spaced less than 0.3 x conduit diameter from it c Single-core or multicore cables: - Fixed on (clipped direct), or spaced less than 0.3 x cable diameter from wooden or masonry wall c Single-core or multicore cables: - On perforated tray run horizontally or vertically c,h
A
B
C
E or F
>0.3 D e
>0.3 D e
c Care is needed where the cable runs vertically and ventilation is restricted. The ambient temperature at the top of the vertical section can be much higher.
h D e = the external diameter of a multicore cable: - 2.2 x the cable diameter when three single core cables are bound in trefoil, or - 3 x the cable diameter when three single core cables are laid in flat formation.
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Table 9
Rating Factors The tabulated ratings must be reduced for ambient air temperatures higher than 30 0 C; appropriate temperature ratings factors are as follows: -
Ambient Temperature
25 0 C 30 0 C 35 0 C 40 0 C 45 0 C 50 0 C 55 0 C 60 0 C
PVC 70 0 C
1.03
1
0.94 0.87 0.79 0.71 0.61
0.5
Thermosetting 90 0 C (XLPE or LSF)
1.02
1
0.96 0.91 0.87 0.82 0.76 0.71
Table 10
Group Rating Factors Rating factors for one circuit or one multicore cable or for a group of circuits, or a group of multicore cables, to be used with current carrying capacities of Table 6 & 7
Arrangement (cables touching)
Number of circuits or multicore cables
To be used with current carrying capacities, Reference
1 2 3 4 5 6 7 8 9 12 16 20
Bunched in air, on a surface, embedded or enclosed Single layer on wall or floor
1.00 0.80 0.70 0.65 0.60 0.57 0.54 0.52 0.50 0.45 0.41 0.38 Methods A to F
1.00 0.85 0.79 0.75 0.73 0.72 0.72 0.71 0.70 0.70 0.70 0.70 Method C
NOTE 1: These factors are applicable to uniform groups of cables, equally loaded.
NOTE 2: Where horizontal clearances between adjacent cables exceeds twice their overall diameter, no rating factor need be applied. NOTE 3: If a group consists of n single-core cables it may either be considered as n /2 circuits of two loaded conductors or n /3 circuits of three loaded conductors.
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General Installation Guidelines At temperatures of about 0 0 C plastic cables begin to stiffen and should not be bent sharply or struck at these, or 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) six times the diameter.
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Special Guidelines for LSF insulated / sheathed cables LSF (low smoke & fume) insulation / sheath does not have the same mechanical strength as other insulation / sheath material, particularly at higher temperatures. It is therefore recommended that LSF insulated/sheathed cables should be used mainly indoors, and only where cables have been specified to have low smoke and toxic gas emission property. Installation We recommend the following special guidelines, in conjunction with the standard installation instructions. The cables should be stored in proper packed condition, in shade and direct exposure to sun should be avoided. As LSF has lower tear strength property as compared to PVC/PE sheath, special care should be taken during installation to avoid any damage. Even a small cut on the LSF insulation/sheath will result in sheath cracking, as it will run in longitudinal direction due to lower tear strength property of LSF insulation/sheath. Use pay in rollers and corner rollers of non-metallic material (Nylon or Teflon) at least every 3 to 4 meters while laying the cable. As far as possible installation should be undercover or indoors. For outdoor installation, direct exposure
to sunlight should be avoided by using a suitable cable tray. The cables should not be in contact with any hot surface. The requirement of minimum bending radius should be followed as per data sheet.
Any clamping device should not be applied directly on the outer sheath. There should be some cushion (for instance a rubber pad of approx. 3 mm thickness) between the cable’s outer surface and clamps. Maximum distance of unsupported length of cable for horizontal and vertical run should be as below:
Overall diameter of cable (mm)
Max. spacing between the supports for horizontal run (mm)
Max. spacing between the supports for vertical run (mm)
0-14.9
350
450
15-19.9
400
550
20-39.9
450
600
40-59.9
700
900
60 & above
1100
1300
Re-winding In case re-winding should be necessary, extreme caution should be taken during the process to avoid damage The following should be adhered to: The winding should be done equally and uniformly with no over-riding of the coils or pinching on the sides of the drum. The pay-off drum should have an adequate braking system to prevent the cable from coming loose on the drum.
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Oman Cables Quality Assurance In order to ensure the best quality assurance system, it is extremely desirable to test and inspect the product at each stage of manufacturing including raw materials and finished product.
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 and once the material is received with their product certification, Oman Cables quality team tests and inspects the same again. Only those materials which meet Oman Cables internal standards are released for production.
In-Process Inspection:
A team of well experienced and qualified personnel, dedicated to quality, inspects and test all the In-Process materials at every stage and materials complies to the specified requirements are only released for next process.
Finished Product Inspection:
Oman Cables products before leaving ware house undergo the entire applicable test according to the standard to which it is manufactured. Routine tests are carried out for conformity to the specifications on 100% cable drums. Sample tests and type tests are carried out at regular intervals as per the applicable standards to conform the product quality.
Testing Laboratory
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Notes
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Notes
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