National Cable and Wire
Manufacturing Company
CABLECO
Technical Information
for Cables
www.cableco.com.jo 1
INDEX
Contents Page
Introduction--------------------------------------------------------------------------------------------------------------- 5
1-General Electrical Values/Formulas--------------------------------------------------------------------------------- 6
2-Comparison of American Wire Gauges of Solid Round Wires ----------------------------------------------- 7
3-Conductors Data------------------------------------------------------------------------------------------------------- 8
4-General Colors of Cores and Sequence-------------------------------------------------------------------------- 10
5-Cuerrent Rating------------------------------------------------------------------------------------------------------ 11
6-Rating Factors for Current Ratings-------------------------------------------------------------------------------- 16
7-Voltage Drop---------------------------------------------------------------------------------------------------------- 21
8-Conductor Short Circuit Current---------------------------------------------------------------------------------- 23
9-Ordering Guide------------------------------------------------------------------------------------------------------- 28
www.cableco.com.jo 3
Introduction
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.¿ƒHõ∏d »FÉ¡ædG
ÖcGƒàd (LAN Data Cables & Fire Resistant Cables) :πãe á«ŸÉY á°UÉN äÉØ°UGƒe äGP πHGƒc êÉàfGE ≈∏Y πª©dG ” 2011 ΩÉY ‘h
.á°UÉÿGh á«eƒµ◊G ÊÉÑŸGh äÉ°ù°SDƒŸG ‘ áeÉ©dG áeÓ°ùdG ÒjÉ©eh áãjó◊G É«LƒdƒæµàdG ᪶fCG ≈∏Y π°UÉ◊G Qƒ£àdG
(ISO 9000) hõjB’G äÉØ°UGƒe Ö°ùM π«gÉC àdG äÉÑ∏£àe ‘ƒà°ùJ ¿GC ΩGôµdG É¡æFÉHõd IOƒ÷ÉH Égõ«“h É¡JQó≤d ÉJÉÑKEG ácô°ûdG äCÉJQG óbh
. 2003 ΩÉY ‘ ISO 9001/2000 hõjB’G IOÉ¡°T ∂dòch 1996 ΩÉY ‘ ISO 9002/1994 hõj’C G IOÉ¡°T ≈∏Y ∫ƒ°ü◊G ” ób å«M
.∫ÉéŸG Gòg ‘ Ióªà©ŸG äÉ¡÷G øe ISO 9001/2008 hõj’B G IOÉ¡°T ≈∏Y ∫ƒ°ü◊G ” 2009 ΩÉY ‘h
National Cable and Wire Manufacturing Company (CABLECO) was established in 1983 in Jordan,
for production of electrical wires and cables (Armoured and Non Armoured).
The factory is located at Zarqa city, and equipped with series 0f production lines designed to
produce wires and cables of copper or Aluminum conductors insulated /sheathed by (ordinary
PVC or special types of PVC) or (XLPE) or (P.E) or (synthetic rubber EPR) or (XLLSHF, LSHF HALOGEN
FREE) according to the International, British or German standards (IEC, BS, VDE) to comply with
Jordanian and international markets.
The factory is also equipped with series of (Testing and Measuring) equipments calibrated according
to international standards/Traceability to monitor and to control the quality of our production,
starting from raw material, going through various productions /manufacturing stages and up to
delivery stages/finished products.
In 2011, the company has produced cables with special international standards like (LAN Data
cables & Fire Resistant Cables), to be compatible with modern technologies and international
safety standards in public and private buildings.
Our objective is to produce high quality cables to satisfy the customer requirements therefore, we
have achieved registration to ISO 9002/1994 in year 1996 and ISO 9001/2000 in year 2003, and
in year 2009 we have achieved registration to ISO 9001/2008.
www.cableco.com.jo 5
1- General Electrical Values /Formulas:
- Voltage (V) = I * R
- Resistance (R) = ρ * L
A
- D.C Power (P) = V * I
- A.C Power Single Phase (P) = V * I * Cos Ø
- A.C Power Three Phase (P) = √3 * V * I * Cos Ø
- Drop Voltage for Single Phase = 2* I * L* (R Cos Ø +2πƒL Sin Ø)
- Drop Voltage for Three Phase = √3*I* L * (R Cos Ø +2πƒL Sin Ø)
- Inductance of Conductor-Internal (Lint.) = µ int.
8π
- Inductance of Two Parallel Cores-External (Lext.) = µ * ε
C
- Capacitance of Two Parallel Cores (C) = π*ε
Ln D + √ (D²-d²)
d
- Capacitance of Coaxial Conductors (C) = 2 * π * ε
Ln D
d
- Impedance A.C Power Cable Core (Z) = √ (R² + (2πƒL)²)
- Characteristic Impedance for High Frequency Coaxial (Zo) = √ L/C
- Characteristic Impedance for Telephone at Voice Frequency (Zo) = √(R/jωC)
- Attenuation for High Frequency Coaxial (ɑ) = R + G * Zo
2Zo 2
- Attenuation for Telephone at Voice Frequency (ɑ) = √(R * C * 2πƒ/2)
Where:
I=Current
R=Resistance
ρ =Resistivity
L=Length
A=Conductor Area
Cos Ø=Power Factor
ε=Permittivity
D=Diameter over Core Insulation
d=Diameter over Core Conductor
µ=Permeability
ƒ=Frequency
G=Conductance
6 www.cableco.com.jo
2- Comparison Table for American Wire Gauges of Solid Round Wires:
AWG Diameter Cross Section Diameter Cross Section
NO. mm mm² inch Circular Mils
5/0 13.120 135.1 0.5165
4/0 11.684 107.2 0.4600 266800
3/0 10.404 85.0 0.4096 211600
2/0 9.260 67.4 0.3648 167800
1/0 8.250 53.5 0.3249 133100
7.350 42.4 0.2893 105600
1 6.540 33.6 0.2576 83690
2 5.820 26.7 0.2294 66360
3 5.190 21.1 0.2043 52620
4 4.620 16.8 0.1819 41740
5 4.110 13.3 0.1620 33090
6 3.670 10.6 0.1443 26240
7 3.260 8.37 0.1285 20820
8 2.910 6.63 0.1144 16510
9 2.590 5.26 0.1019 13090
10 2.300 4.17 0.0907 10380
11 2.050 3.31 0.0808
12 1.830 2.63 0.0720 8230
13 1.630 2.08 0.0641 6530
14 1.450 1.65 0.0571 5180
15 1.290 1.31 0.0508 4110
16 1.150 1.04 0.0453 3260
17 1.020 0.823 0.0403 2580
18 0.904 0.653 0.0359 2050
19 0.813 0.519 0.0320 1620
20 0.724 0.412 0.0285 1290
21 0.643 0.324 0.0253 1020
22 0.574 0.259 0.0226 812
23 0.511 0.205 0.0201 640
24 0.455 0.162 0.0179 511
25 0.404 0.128 0.0159 404
26 0.361 0.102 0.0142 320
27 0.320 0.0804 0.0126 253
28 0.287 0.0647 0.0113 202
29 0.254 0.0507 0.0100 159
30 0.226 0.0401 0.0089 128
31 0.203 0.0324 0.0080 100
32 0.180 0.0255 0.0071 79.2
33 0.160 0.0201 0.0063 64.0
34 0.142 0.0159 0.0056 50.4
35 0.127 0.0127 0.0050 39.7
36 0.114 0.0103 0.0045 31.4
37 0.102 0.0040 25.0
38 0.00811 20.2
16.0
www.cableco.com.jo 7
3- Conductors Data
3.1- Stranded Conductors Data for Single Core and Multi Cores Cables
1 2345 6 7 89 10
Nominal Number of Wires in Conductor Maximum Resistance of Conductor at
20 °C
Nominal
Cross Circular Conductor Circular Compacted Shaped Conductor Annealed Copper Aluminum
CU AL Conductor CU AL Conductor Conductor
Sectional Plain or Metal Clad
Area CU AL Plain Metal
Wires Coated Wires
Wires
mm² Ω/Km Ω/Km Ω/Km
0.5 7 - - - - - 36.0 36.7 -
0.75 7 - - - - - 24.5 24.8 -
1.0 7 - - - - - 18.1 18.2 -
1.5 7 - 6 - - - 12.1 12.2 -
2.5 7 - 6 - - - 7.41 7.56 -
4.0 7 7 6 - - - 4.61 4.70 7.41
6.0 7 7 6 - - - 3.08 3.11 4.61
10 7 7 6 - - - 1.83 1.84 3.08
16 7 7 6 6 - - 1.15 1.16 1.91
25 7 7 6 6 6 6 0.727 0.734 1.20
35 7 7 6 6 6 6 0.524 0.529 0.868
50 19 19 6 6 6 6 0.387 0.391 0.641
70 19 19 12 12 12 12 0.268 0.270 0.443
95 19 19 15 15 15 15 0.193 0.195 0.320
120 37 37 18 15 18 15 0.153 0.154 0.253
150 37 37 18 15 18 15 0.124 0.126 0.206
185 37 37 30 30 30 30 0.0991 0.100 0.164
240 61 61 34 30 34 30 0.0754 0.0762 0.125
300 61 61 34 30 34 30 0.0601 0.0607 0.100
400 61 61 53 53 53 53 0.0470 0.0475 0.0778
500 61 61 53 53 53 53 0.0366 0.0369 0.0605
630 91 91 53 53 53 53 0.0283 0.0286 0.0469
800 91 91 53 53 - - 0.0221 0.0224 0.0367
1000 91 91 53 53 - - 0.0176 0.0177 0.0291
8 www.cableco.com.jo
3- Conductors Data
3.2-Flexible Conductors Data for Single Core and Multi Cores Cables
1 2 34
Nominal Cross Sectional Maximum Diameter of Wires in Maximum Resistance of Conductor at 20 °C
Area Conductor
Plain Wires Metal Coated Wires
mm² mm Ω/Km Ω/Km
0.5 0.21 39.0 40.1
0.75 0.21 26.0 26.7
1.0 0.21 19.5 20.0
1.5 0.26 13.3 13.7
2.5 0.26 7.98 8.21
4.0 0.31 4.95 5.09
6.0 0.31 3.30 3.39
10 0.41 1.91 1.95
16 0.41 1.21 1.24
25 0.41 0.780 0.795
35 0.41 0.554 0.565
50 0.41 0.386 0.393
70 0.51 0.272 0.277
95 0.51 0.206 0.210
120 0.51 0.161 0.164
150 0.51 0.129 0.132
185 0.51 0.106 0.108
240 0.51 0.0801 0.0817
300 0.51 0.0641 0.0654
400 0.51 0.0486 0.0495
500 0.61 0.0384 0.0391
630 0.61 0.0287 0.0292
www.cableco.com.jo 9
4- General Colors of Cores and Sequence
Power Cables: The general normal colors sequences as follows:
Single Core: Black or any color according your requirement
Two Cores: (Red, Black) or (Black, Blue)
Three Cores: (Red, Yellow, Blue) or (Black, Blue, Brown) or (Green/Yellow, Black, Blue)
Four Cores: (Red, Yellow, Blue, Black) or (Black, Blue, Brown, Black) or (Green/Yellow, Black, Blue, Brown)
Five Cores: (Red, Yellow, Blue, Black, Green/Yellow)
Six Cores and More: (Can be in any different Colors) or (Black with White No’s) or (White with Black No’s)
Note: Normally Reduced Core if any is Black or Green/Yellow
Flexible Cables: The general normal colors sequences as follows:
Single Core: Black or any color according your requirement
Two Cores: (Blue, Brown) or (Black, Blue)
Three Cores: (Black, Blue, Brown) or (Green/Yellow, Brown, Blue)
Four Cores: (Black, Blue, Brown, Black) or (Green/Yellow, Black, Blue, Brown)
Five Cores: (Black, Blue, Brown, Black, Black) or (Green/Yellow, Black, Blue, Brown, Black) or (Blue,
Brown, Green/Yellow, Black, Gray)
Six Cores and More: (Can be in any different Colors) or (Black with White No’s) or (White with Black No’s)
10 www.cableco.com.jo
5- Current Ratings (AC)
The maximum current ratings for cables manufactured according to IEC, BS and VDE in general are
given in the following tables.
The Current ratings of cables given below are based on the ERA (Electrical Research Association) report
which accepted worldwide (ERA Publications), related to cable industry (AC system 0.6/1.0 KV-50/60 Hz).
Cables may only be continuously operated at their tabulated ratings if the minimum current at which
circuit protection is designed to operate does not exceed 1.5 times (for cables in air or in ducts) or 1.3
times (for cables laid direct in ground ) the values given in the tables.
Standard Installation Conditions for Ratings
The following conditions have been used to calculate the current ratings given in the tables:
Thermal soil resistivity: 1.2 Km/W
Standard ground temperature: 15 ºC
Ambient air temperature: 25 ºC
Depth of laying (from ground surface to center of cable or duct): 0.5 m
www.cableco.com.jo 11
Current Ratings (AC)
Stranded Copper and Aluminum Conductors Single Core Cables in Trefoil Formation
Stranded Copper Conductors for XLPE Insulation
Nominal Area of Direct in Ground In Single Way Ducts Installed in Air
Conductor Amps Amps Amps
mm²
50 Armoured Armoured Unarmoured Armoured
70
95 231 231 223 231
120
150 284 278 284 295
185
240 340 327 352 362
300
400 386 366 412 420
500
630 431 396 475 483
800
1000 485 437 551 555
50 558 489 658 654
70
95 623 534 761 745
120
150 691 567 887 851
185
240 765 615 1027 963
300
400 841 664 1186 1084
500
630 888 692 1347 1178
942 735 1503 1278
Stranded Aluminum Conductors for XLPE Insulation
177 178 165 173
218 216 211 221
260 255 261 271
296 288 304 314
331 315 351 362
374 350 409 417
433 397 489 494
486 438 567 566
550 495 624 624
623 562 690 690
705 638 782 782
Stranded Copper and Aluminum Conductors Two Cores Cables
Stranded Copper Conductors for XLPE Insulation
Nominal Area of Direct in Ground In Single Way Ducts Installed in Air
Conductor Amps Amps Amps
mm²
1.5 Armoured Armoured Unarmoured Armoured
2.5
4 38 31 - 31
6
10 49 41 - 41
16
25 65 53 - 55
35
50 81 67 - 70
70
95 109 89 - 95
120
150 141 115 124 126
185
240 183 148 156 164
300
400 219 178 193 202
259 211 235 244
317 260 298 306
381 313 368 378
433 357 429 437
485 401 491 499
547 455 569 576
632 527 678 680
708 592 783 775
799 669 911 892
Stranded Aluminum Conductors for XLPE Insulation
16 108 88 93 95
25 138 112 116 122
35 165 135 142 149
50 196 160 172 180
70 241 197 219 227
95 288 237 270 279
12 www.cableco.com.jo
Current Ratings (AC)
Stranded Copper and Aluminum Conductors 3 & 4 Cores Cables
Stranded Copper Conductors for XLPE Insulation
Nominal Area of Direct in Ground In Single Way Ducts Installed in Air
Conductor Amps Amps Amps
mm² Armoured Armoured Unarmoured Armoured
1.5 32 26 24 26
2.5 42 34 32 35
4 55 45 44 47
6 69 56 55 59
10 92 75 79 82
16 119 96 107 107
25 152 124 134 140
35 182 149 165 172
50 217 177 201 209
70 266 218 256 263
95 319 263 316 324
120 363 300 369 376
150 406 338 423 430
185 458 382 489 495
240 529 442 582 584
300 592 496 672 666
400 667 570 780 766
Stranded Aluminum Conductors for XLPE Insulation
16 91 74 81 81
25 116 95 101 106
35 139 113 124 129
50 165 135 151 157
70 203 167 192 198
95 244 201 237 244
120 278 230 277 283
150 311 259 317 324
185 353 294 368 375
240 409 342 438 444
300 461 386 507 508
www.cableco.com.jo 13
Current Ratings (AC)
Stranded Copper and Aluminum Conductors Single Core Cables in Trefoil Formation
Stranded Copper Conductors for PVC Insulation
Nominal Area of Direct in Ground In Single Way Ducts Installed in Air
Conductor Amps Amps Amps
mm² Armoured Armoured Unarmoured Armoured
1.5 26 26 26 26
2.5 35 35 35 35
4 46 46 46 46
6 58 58 58 58
10 80 80 80 80
16 110 110 100 100
25 140 140 132 132
35 175 175 160 160
50 203 199 184 193
70 248 241 233 243
95 297 282 290 298
120 337 311 338 347
150 376 342 388 395
185 423 375 450 452
240 485 419 537 532
300 542 459 620 607
400 600 489 722 690
500 660 523 832 776
630 721 563 957 869
800 756 587 1083 937
1000 797 621 1206 1010
Stranded Aluminum Conductors for PVC Insulation
25 110 110 100 100
35 130 130 125 125
50 154 154 137 141
70 188 188 174 177
95 226 222 215 218
120 257 252 251 254
150 288 280 288 289
185 326 306 335 337
240 377 347 400 399
300 424 384 464 458
400 500 434 532 532
500 560 492 587 587
630 600 559 666 666
14 www.cableco.com.jo
Current Ratings (AC)
Stranded Copper and Aluminum Conductors Two Cores Cables
Stranded Copper Conductors for PVC Insulation
Nominal Area of Direct in Ground In Single Way Ducts Installed in Air
Conductor Amps Amps Amps
mm²
1.5 Armoured Armoured Unarmoured Armoured
2.5
4 32 26 21 24
6
10 41 34 29 33
16
25 55 45 38 44
35
50 69 57 48 56
70
95 92 76 72 77
120
150 119 98 97 102
185
240 158 129 130 136
300
400 190 154 159 166
16 225 183 194 201
25
35 277 225 244 252
50
70 332 271 302 312
95
377 309 351 360
422 346 402 409
478 393 464 473
551 455 552 558
616 510 636 636
693 574 739 729
Stranded Aluminum Conductors for PVC Insulation
91 75 74 77
118 96 96 98
142 115 117 120
168 137 143 145
209 170 180 185
250 204 222 227
Stranded Copper and Aluminum Conductors 3 & 4 Cores Cables
Stranded Copper Conductors for PVC Insulation
Nominal Area of Direct in Ground In Single Way Ducts Installed in Air
Conductor Amps Amps Amps
mm²
1.5 Armoured Armoured Unarmoured Armoured
2.5
4 27 22 18 21
6
10 35 29 25 28
16
25 47 38 36 38
35
50 59 48 47 48
70
95 78 64 63 66
120
150 101 83 84 87
185
240 132 107 110 116
300
400 159 129 136 142
16 188 153 166 172
25
35 233 190 210 218
50
70 279 228 259 268
95
120 317 260 302 310
150
185 355 292 345 355
240
300 401 331 398 407
462 382 474 480
517 428 545 547
580 490 631 627
Stranded Aluminum Conductors for PVC Insulation
77 62 63 65
100 81 83 85
120 97 102 104
143 116 124 128
176 144 158 161
213 174 195 200
243 199 226 232
272 223 259 264
309 254 299 306
360 298 357 366
407 338 412 421
www.cableco.com.jo 15
6- Rating Factors for Current Ratings
Rating Factors for Variation in Ground Temperature for Cables Laid Direct in the Ground and in Ducts
Ground Temperature ºC 10 15 20 25 30 35 40
Rating Factor 1.03 1.0 0.97 0.93 0.89 0.86 0.82
(Maximum Conductor Temperature 90 ºC)
Rating Factors for Variation in Ambient Air Temperature
Air Temperature ºC 25 30 35 40 45 50 55
Rating Factor 1.0 0.96 0.92 0.88 0.83 0.78 0.73
(Maximum Conductor Temperature 90 ºC)
Rating Factors for Variation in Ground Temperature for Cables Laid Direct in the Ground and in Ducts
Ground Temperature ºC 10 15 20 25 30 35 40 45 50
Rating Factor 1.04 1.0 0.95 0.90 0.85 0.80 0.74 0.67 0.60
(Maximum Conductor Temperature 70 ºC)
Rating Factors for Variation in Ambient Air Temperature
Air Temperature ºC 25 30 35 40 45 50 55
Rating Factor 1.0 0.94 0.88 0.82 0.75 0.67 0.58
(Maximum Conductor Temperature 70 ºC)
Rating Factors for Depth of Laying for Cables Laid Direct in the Ground
Depth of Laying Meter Up to 50 mm² 70 mm² to 300 mm² Above 300 mm²
0.5 1.0 1.0 1.0
0.6 0.99 0.98 0.97
0.8 0.97 0.96 0.94
1.0 0.95 0.93 0.92
1.25 0.94 0.92 0.89
1.5 0.93 0.90 0.87
1.75 0.92 0.89 0.86
2.0 0.91 0.88 0.85
2.5 0.90 0.87 0.84
0.89 0.85 0.82
3.0 or more
Rating Factors for Depth of Laying Single, Twin or Multi-Cores Cables in Single Way Duct
Depth of Laying Meter Single Core Multi-Cores
0.5 1.0 1.0
0.6 0.98 0.99
0.8 0.95 0.98
1.0 0.93 0.96
1.25 0.91 0.95
1.5 0.89 0.94
1.75 0.88 0.94
2.0 0.87 0.93
2.5 0.86 0.92
3.0 or more 0.85 0.91
16 www.cableco.com.jo
Rating Factors for Variation in Thermal Resistivity of Soil Twin or Multi-Cores Cables Laid Direct in the Ground
Nominal Area of Conductor Value of Resistivity Km/W
mm²
0.7 0.8 0.9 1.0 1.5 2.0 2.5 3.0 3.5 4.0
1.5 to 2.5 1.12 1.09 1.07 1.04 0.94 0.86 0.80 0.75 0.70 0.66
4 1.13 1.10 1.07 1.05 0.94 0.85 0.79 0.74 0.69 0.65
6 1.14 1.10 1.07 1.05 0.93 0.85 0.79 0.74 0.68 0.64
10 1.15 1.11 1.08 1.05 0.93 0.85 0.78 0.73 0.67 0.63
16 1.16 1.12 1.08 1.05 0.93 0.84 0.77 0.72 0.66 0.62
25 to 50 1.17 1.13 1.09 1.06 0.92 0.83 0.76 0.71 0.65 0.61
70 to 150 1.19 1.14 1.10 1.06 0.92 0.82 0.75 0.69 0.64 0.60
185 to 400 1.20 1.15 1.10 1.07 0.92 0.81 0.74 0.69 0.63 0.59
Rating Factors for Variation in Thermal Resistivity of Soil Three Single Cores Cables Laid Direct in the Ground
Nominal Area of Conductor Value of Resistivity Km/W
mm²
0.7 0.8 0.9 1.0 1.5 2.0 2.5 3.0 3.5 4.0
50 to 185 1.22 1.16 1.12 1.07 0.91 0.81 0.73 0.68 0.63 0.59
240 to 800 1.23 1.17 1.12 1.07 0.91 0.80 0.73 0.67 0.62 0.58
960 to 1200 1.24 1.18 1.12 1.08 0.90 0.80 0.72 0.66 0.61 0.58
Rating Factors for Variation in Thermal Resistivity of Soil Twin or Multi-Cores Cables Laid in Single Way Ducts
Nominal Area of Conductor Value of Resistivity Km/W
mm²
0.7 0.8 0.9 1.0 1.5 2.0 2.5 3.0 3.5 4.0
1.5 to 2.5 1.04 1.03 1.02 1.02 0.98 0.94 0.91 0.88 0.86 0.83
4 to 10 1.05 1.04 1.03 1.02 0.97 0.93 0.90 0.87 0.84 0.81
16 to 35 1.06 1.05 1.03 1.02 0.96 0.92 0.88 0.84 0.82 0.78
50 to 95 1.07 1.06 1.04 1.02 0.96 0.91 0.86 0.82 0.79 0.76
120 to 150 1.08 1.06 1.04 1.03 0.95 0.90 0.85 0.81 0.78 0.74
185 to 400 1.09 1.07 1.05 1.03 0.95 0.89 0.84 0.79 0.76 0.72
Rating Factors for Variation in Thermal Resistivity of Soil Three Single Cores Cables Laid in Single Way Ducts
Nominal Area of Conductor Value of Resistivity Km/W
mm²
0.7 0.8 0.9 1.0 1.5 2.0 2.5 3.0 3.5 4.0
50 to 95 1.12 1.09 1.06 1.04 0.94 0.87 0.81 0.76 0.72 0.68
120 to 185 1.13 1.10 1.07 1.04 0.94 0.86 0.80 0.75 0.71 0.67
240 to 500 1.14 1.11 1.08 1.05 0.93 0.85 0.79 0.74 0.69 0.65
600 to 800 1.15 1.12 1.09 1.05 0.93 0.84 0.78 0.72 0.68 0.64
960 to 1200 1.16 1.13 1.09 1.05 0.92 0.83 0.77 0.71 0.67 0.63
www.cableco.com.jo 17
- Conversion factors for current ratings in case of more cables erected in air for single core
cables in three phase systems (approximate estimation).
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- Conversion factors for current ratings in case of more cables erected in air for multi-cores
cables in three phase systems (approximate estimation).
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- Conversion factors for current ratings in case of more cables erected in air for multi-cores
cables in three phase systems (approximate estimation).
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7- Voltage Drop :
Voltage drop is especially of importance for cables of voltage rating not exceeding voltage 0.6/1 KV,
Relevant installation regulations have to be observed with respect to the maximum permissible voltage
drop of cable circuits which normally should not exceeds 3.5% of the nominal voltage.
Approximate values of voltage drop are contained in table 5.4 and are based on a current of 1 A for a
cable length of 1 meter.
For a given cable route the tabulated values have to be multiplied by the cable length (in meters) and
by the current (in amperes) that the cable carries under assumed load conditions.
It should observed, however, that the application of the tabulated values of specific voltage drop only
yields approximate results but with sufficient accuracy for cables up to including 120 mm² where the
power factor of load power factor does not exceed 0.8.
For other conditions exact individual calculations should be considered.
Below the voltage drop for three phase system, for single phase system multiply the tabulated values
by factor (1.16).
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7.1- Voltage Drop for PVC Insulated Cables Volt/Ampere/Meter
Conductor Copper Aluminum
Area Two
Single Two Multi Single Cores Multi
mm² Trefoil Cores Cores Trefoil mV Cores
mV mV mV
1.5 mV 4.50 mV
2.5 Armoured and Unarmoured 2.90
4 26.30 2.10 15.40
6 16.10 30.40 26.30 1.55 9.60
10 10.0 1.05 6.40
16 6.70 18.60 16.10 0.79 3.90
25 3.80 0.63 2.50
35 2.40 11.60 10.0 0.52 1.80
50 1.52 0.42 1.35
70 1.10 7.70 6.70 0.34 0.92
95 0.82 0.28 0.68
120 0.59 4.60 3.80 0.24 0.55
150 0.45 0.44
185 0.37 2.80 2.40 3.97 0.37
240 0.31 0.30
300 0.27 1.75 1.50 2.50 0.25
400 0.23 0.21
500 0.21 1.25 1.10 1.81
630 0.195
800 0.18 0.94 0.81 1.35
1000 0.17
0.16 0.65 0.57 0.92
0.155
0.50 0.43 0.69
0.41 0.35 0.55
0.34 0.29 0.45
0.29 0.25 0.37
0.24 0.21 0.30
0.21 0.185 0.26
0.185 0.16 0.23
0.20
0.18
0.17
0.16
7.2- Voltage Drop for XLPE Insulated Cables Volt/Ampere/Meter
Conductor Copper Aluminum
Area Two
Single Two Multi Single Cores Multi
mm² Trefoil Cores Cores Trefoil mV Cores
mV mV mV
1.5 mV 19.0 mV
2.5 Armoured and Unarmoured 11.80
4 26.70 7.90 16.50
6 16.40 30.90 26.70 4.80 10.24
10 10.20 3.10 6.84
16 6.80 18.90 16.40 2.20 4.20
25 1.65 2.70
35 4.0 11.80 10.20 16.50 1.15 1.95
50 2.50 0.84 1.45
70 1.62 7.90 6.80 10.24 0.72 0.97
95 1.17 0.61 0.72
120 0.87 4.70 4.0 6.84 0.52 0.58
150 0.62 0.42 0.47
185 0.47 2.90 2.50 4.20 0.39 0.39
240 0.39 0.36 0.31
300 0.33 1.90 1.65 2.70 0.26
400 0.28 0.21
500 0.24 1.35 1.15 1.93
630 0.21
800 0.195 1.0 0.87 1.40
1000 0.18
0.17 0.69 0.60 0.98
0.165
0.155 0.52 0.45 0.74
0.42 0.37 0.60
0.35 0.30 0.49
0.29 0.26 0.41
0.24 0.21 0.34
0.21 0.185 0.29
0.19 0.165 0.25
0.21
0.19
0.18
0.17
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8- Conductor Short Circuit Ratings
The resistance of the insulation to high temperature that may be produced by a short circuit in a network
is determined by the short circuit temperature limit , according to which the cable has to be rated.
The values of short circuit ratings derived based on the type of conductor insulation for insulated cables
which being fully loaded at the start of the short circuit conductor temperature of ( 70 ºC for PVC
insulation and 90 ºC for XLPE insulation) and final conductor temperature of (160 ºC for PVC insulation
and 250 ºC for XLPE insulation)
The short circuit currents in the following table are values for one second.
Conductor Cross Aluminum Copper
Section Area
mm² Type of Insulation Type of Insulation
6 PVC XLPE PVC XLPE
10
16 0.46 0.56 0.69 0.84
25
35 0.76 0.94 1.15 1.40
50
70 1.22 1.50 1.84 2.24
95
120 1.90 2.35 2.88 3.50
150
185 2.66 3.29 4.03 4.90
240
300 3.80 4.70 5.75 7.00
400
500 5.32 6.58 8.05 9.80
630
800 7.22 8.93 10.93 13.30
1000
9.12 11.28 13.80 16.80
11.40 14.10 17.25 21.00
14.06 17.39 21.28 25.90
18.24 22.56 27.60 33.60
22.80 28.20 34.50 42.00
27.20 37.60 41.20 56.00
34.00 47.00 51.50 70.00
42.84 59.22 64.89 88.20
54.40 75.20 82.40 112.00
68.00 94.00 103.00 140.00
Copper conductor PVC insulation short circuit current in (KA) = 0.115*A/√t (for ≤ 300 mm²)
= 0.103*A/√t (for ˃ 300 mm²)
Aluminum conductor PVC insulation short circuit current in (KA) = 0.076*A/√t (for ≤ 300 mm²)
= 0.068*A/√t (for ˃ 300 mm²)
Copper conductor XLPE insulation short circuit current in (KA) = 0.143*A/√t
Aluminum conductor XLPE insulation short circuit current in (KA) = 0.094*A/√t
Where:
t: short circuit time in seconds
A: conductor cross section area mm²
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8.1-Short Circuit Curves
1.1.1-Short Circuit Curve for Copper Conductor PVC Insulated Cables
- Copper conductor PVC insulation short circuit current in (KA) = 0.115*A/√t
Where:
t: short circuit time in seconds
A: conductor cross section area mm²
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8.1.2- Short Circuit Curve for Copper Conductor XLPE Insulated Cables
- Copper conductor XLPE insulation short circuit current in (KA) = 0.143*A/√t
Where:
t: short circuit time in seconds
A: conductor cross section area mm²
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8.1.3- Short Circuit Curve for Aluminum Conductor PVC Insulated Cables
- Aluminum conductor PVC insulation short circuit current in (KA) = 0.076*A/√t
Where:
t: short circuit time in seconds
A: conductor cross section area mm²
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1.1.4-Short Circuit Curve for Aluminum Conductor XLPE Insulated Cables
- Aluminum conductor XLPE insulation short circuit current in (KA) = 0.094*A/√t
Where:
t: short circuit time in seconds
A: conductor cross section area mm²
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Due to the wide range of cables in the catalogue, it is advisable, when ordering, to provide as
much information as possible, please use the following information as a guide.
Ordering Guide
The following details will ensure that your enquiries and orders will be achieved quickly and
efficiently:
1- Length of cables and individual drum lengths.
2- Voltage designation.
3- Relevant British or International Standard.
4- Number of Cores.
5- Conductor Size.
6- Type of Insulation.
7- Type of Bedding.
8- Type of Armouring.
9- Type of Outer Sheathing.
10- Any Other Special Requirements, e.g. Special Insulation or Sheath Material, etc.
Technical Service
Specialist advice and assistance on all matters, you can contact us on:
National Cable and Wire Manufacturing Company (CABLECO)
P.O.Box 927104, Amman-Jordan
Tel : 962-6-5511484 / 962-6-5511867 Fax: 962-6-5532081
E-mail: [email protected]
[email protected]
Website: www.cableco.com.jo
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