IEEE 45/1580 & UL 1309/1072 Sales Office Tel:82-2-2140-3042 Fax:82-2-2140-3098 Head Office Tel:82-43-530-2000 Fax:82-43-530-2140 Pusan Office Tel:82-51-817-0295 Fax:82-51-817-0297 IEEE 45/1580 & UL 1309/1072 Sales Office Tel:82-2-2140-3042 Fax:82-2-2140-3098 Head Office Tel:82-43-530-2000 Fax:82-43-530-2140 Pusan Office Tel:82-51-817-0295 Fax:82-51-817-0297 Installation Recommendations The following installation recommendations are in accordance with IEEE 2002 1. Minimum bending radius D:cable’s diameter(mm) 2. Cable pulling-in force Care should be taken to prevent damage to insulation or distortion of cable during installation. The pulling force in Newtons should not exceed 0.036 times the circular mil area of the copper cross-sectional area times the number of conductors in the cable when pulling on the conductors utilizing pulling eyes and bolts. Pulling force for multicore cables when utilizing eyes or bolts should not include drain or ground conductors in the copper cross-sectional area. When pulling with a basket weave grip, maximum pulling tension (per grip) should not exceed 4.5kN, or the value calculated for eyes or bolts, whichever is greater. The sidewall pressure should not exceed a maximum of 7.3kN per meter of the inside radius of the bend. Cables should not be pulled in freezing conditions. If conditions are below 0 , consult the manufacturer. If it is necessary to pull in these conditions, cables shoulld be stored at a temperature above 10 for 24 h prior to installation, if the cable has been previously stored in an area under 0 . When installing low smoke cables, additional consideration should be given to handling and lubrication due to their possible lower tear strength and higher coefficient of friction than other marine cable. For more guidance concerning this subject, refer to IEEE Std 576-2001 Armored Cable 8D Unarmored Cable 6D Cable type Minimum bending radius , 3. Single-conductor ac cables To avoid an undesirable inductive effect in ac installlations, the following precautions should be observed. Closed magnetic circuits around single-conductor ac cable should be avoided, and no magnetic material should be permitted between cables of different phases of a circuit. a) Single-conductor ac cables should not be located closer than 76mm from parallel magnetic material. b) Single-conductor ac cable should be supported on insulators. Armor, if used, should be grounded only at approximately the midpoint of the cable run. c) Where single-conductor ac cables penetrate the bulkhead, conductors of each phase of the same circuit should pass through a common nonferrous bulkhead plate to prevent heating of the bulkhead. d) Single-conductor cables in-groups should be arranged to minimize their inductive effect. This may be accomplished by the transposition of cables in groups of three (one each phase) to give the effect of triplexed cable. This transposition should be made at intervals of not over 15m and need not be made in cable runs of less than 30m. 4. Cable continuity and grounding All cable should be continuous between terminations, however, splicing is permitted under certain conditions. For cable provided with armor, the armor should be electrically continuous between terminations and should be grounded at each end (multiconductor cables only); except that for final subcircuits, the armor may be grounded at the supply end only. 5. Cable locations Cable installation should avoid spaces where excessive heat and gases may be encountered such as galleys, boiler rooms and pump rooms, and spaces where cables may be exposed to damage such as cargo spaces and exposed sides of deck houses. Cables should not be located in cargo tanks, ballast tanks, fuel tanks, or water tanks except to supply equipment and instrumentaion specifically designed for such locations and whose functions require it to be installed on the tank. Such equipment may include submerged cargo pumps and associated control devices, cargo monitoring, and underwater navigation systems. Unless unavoidable, cables should not be located behind or embedded in structural heat insulation. Where cables are installed behind paneling, all connections should be readily accessible and the location of concealed connection boxes should be indicated. Cables should preferably not be run through refrigerated cargo spaces. Cables should not be located below the faceplate of the vessel s main bottom structural members or within .6m above any double bottom tanktop. Low Voltage Distribution Low Voltage Control cable Low Voltage Signal cable High Voltage Distribution Information Data
The following installation recommendations are in accordance with IEEE 2002
1. Minimum bending radius
D:cable’s diameter(mm)
2. Cable pulling-in force
Care should be taken to prevent damage to insulation or distortion of cable during installation.
The pulling force in Newtons should not exceed 0.036 times the circular mil area of the coppercross-sectional area times the number of conductors in the cable when pulling on the conductorsutilizing pulling eyes and bolts. Pulling force for multicore cables when utilizing eyes or bolts shouldnot include drain or ground conductors in the copper cross-sectional area. When pulling with abasket weave grip, maximum pulling tension (per grip) should not exceed 4.5kN, or the valuecalculated for eyes or bolts, whichever is greater.
The sidewall pressure should not exceed a maximum of 7.3kN per meter of the inside radius of thebend.
Cables should not be pulled in freezing conditions. If conditions are below 0 , consult themanufacturer.
If it is necessary to pull in these conditions, cables shoulld be stored at a temperature above 10for 24 h prior to installation, if the cable has been previously stored in an area under 0 .
When installing low smoke cables, additional consideration should be given to handling andlubrication due to their possible lower tear strength and higher coefficient of friction than othermarine cable.
For more guidance concerning this subject, refer to IEEE Std 576-2001
Armored Cable 8D
Unarmored Cable 6D
Cable type Minimum bending radius
,
3. Single-conductor ac cables
To avoid an undesirable inductive effect in ac installlations, the following precautions should beobserved.
Closed magnetic circuits around single-conductor ac cable should be avoided, and no magneticmaterial should be permitted between cables of different phases of a circuit.
a) Single-conductor ac cables should not be located closer than 76mm from parallel magneticmaterial.
b) Single-conductor ac cable should be supported on insulators. Armor, if used, should be groundedonly at approximately the midpoint of the cable run.
c) Where single-conductor ac cables penetrate the bulkhead, conductors of each phase of the samecircuit should pass through a common nonferrous bulkhead plate to prevent heating of thebulkhead.
d) Single-conductor cables in-groups should be arranged to minimize their inductive effect. This maybe accomplished by the transposition of cables in groups of three (one each phase) to give theeffect of triplexed cable. This transposition should be made at intervals of not over 15m and neednot be made in cable runs of less than 30m.
4. Cable continuity and grounding
All cable should be continuous between terminations, however, splicing is permitted under certain conditions. For cableprovided with armor, the armor should be electrically continuous between terminations and should be grounded at eachend (multiconductor cables only); except that for final subcircuits, the armor may be grounded at the supply end only.
5. Cable locations
Cable installation should avoid spaces where excessive heat and gases may be encountered such as galleys, boiler roomsand pump rooms, and spaces where cables may be exposed to damage such as cargo spaces and exposed sides of deckhouses. Cables should not be located in cargo tanks, ballast tanks, fuel tanks, or water tanks except to supply equipmentand instrumentaion specifically designed for such locations and whose functions require it to be installed on the tank. Suchequipment may include submerged cargo pumps and associated control devices, cargo monitoring, and underwaternavigation systems.
Unless unavoidable, cables should not be located behind or embedded in structural heat insulation. Where cables areinstalled behind paneling, all connections should be readily accessible and the location of concealed connection boxesshould be indicated. Cables should preferably not be run through refrigerated cargo spaces.
Cables should not be located below the faceplate of the vessel s main bottom structural members or within .6m above anydouble bottom tanktop.
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Electrical Data
1. Construction and resistance of conductor
(1) Temperature correction factors for annealed high conductivity copper
Values of the correction factor (Kc) and reciprocal of factor (Kr) are given in following table for a normal range oftemperatures in accordance with IEC Pub. 60228.The values are based on the following formula :
Cables should be adequately protected where exposed to mechanical damage. Cables should be securedagainst chafing or displacement due to vibration. Cables in bunkers, and where particularly liable to damage,such as locations in way of cargo ports, hatches, tank tops, and where passing through decks, should beprotected by removable metal coverings, angle irons, or other equivalent means.
Where cables pass through insulation, they should be protected by a continuous pipe. For wiring enteringrefrigerated compartments, the pipe should be of heat-insulating material (fiber or phenolic tubing) joined tothe bulkhead-stuffing tube, or a section of such material should be inserted between the bulkhead-stuffing tubeand the metallic pipe.
Where cables are installed in pipes, the space factor (ratio of the sum of the cross-sectional areascorresponding to the external diameter of the cables to the internal cross-sectional areas of the pipe) shall notbe greater than 0.41, except for two cables, where the space factor shall not exceed 0.31, Pipes shall be soarranged or designed to prevent the accumulation of internal condensation.
(3) Construction and resistances of flexible stranded conductors.
* Rope lay strandedNote) The number of strands are nominal and may vary so as to comply with both the d.c resistance and maximum
diameter requirements.Resistance( /km) were calculated from the ICEA formula and converted to /km at 20 .R=Ro Ko(3.281) K1(0.98073)
Ro ; Norminal conductor resistance in /1000ft @ 25Ko ; Converts /1000ft to /km (Ko=3.281)K1 ; Converts 25 values to 20 , ICEA S 61 402 Table 6 1 (K1=0.98073)
Distribution, Power cables - single banked maximum ampacity in air(IEEE 45-1998, Type E @ 45 ambient)
Notes:1) Current ratings are for ac or dc.2) Current-carrying capacity of four conductor cables where one conductor is neutral, is the same as three conductor
cables.3) If ambient temperatures differ from 45 the values shown above should be multiplied by the following factors:
16,500 17 8 8.4
20,800 21 7 10.6
26,230 26 6 13.3
33,100 33 5 16.8
41,700 42 4 21.1
52,600 53 3 26.7
66,400 66 2 33.6
83,700 84 1 42.4
106,000 106 1/0 53.5
133,000 133 2/0 67.4
168,000 168 3/0 85.0
212,000 212 4/0 107.2
250,000 250 127.0
262,000 262 133.1
300,000 300 152.0
313,000 313 158.7
350,000 350 177.0
373,000 373 189.4
400,000 400 203.0
444,000 444 225.2
500,000 500 253.0
535,000 535 271.3
600,000 600 304.0
646,000 646 327.6
750,000 750 380.0
777,000 777 394.2
1,000,000 1000 507.0
1,111,000 1111 563.1
Conductor
MC MCM AWG MM2
68 48
77 59
88 65
100 75
118 83
134 99
156 111
180 131
207 150
240 173
278 201
324 232
359 259
378 273
412 290
423 298
446 317
474 332
489 342
546 382
560 393
615 432
623 440
671 474
723 494
755 516
867
942 644
Single Conductor Cable Three Conductor Cable
Maximum conductor temperature : 90
Type E insulated cables
Type P(X110) insulated cables
Ambient temperature
1.05
1.04
40
0.94
0.95
50
0.82
0.85
60
-
0.74
70
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Distribution, control and signal cables - single banked maximum ampacity in air(IEEE 45-1995, Type X110 @ 45 ambient)
14 2.1 4410
12 3.3 6530
10 5.3 10400
8 8.4 16900
7 10.6 20800
6 13.3 26300
5 16.8 33100
4 21.1 41700
3 26.7 52600
2 33.6 66400
1 42.4 83700
1/0 53.5 106000
2/0 67.4 133000
3/0 85.0 168000
4/0 107 212000
250MCM 127 250000
300MCM 152 300000
350MCM 177 350000
400MCM 203 400000
500MCM 253 500000
535MCM 271 535000
600MCM 304 600000
646MCM 327 646000
750MCM 380 750000
777MCM 394 777000
1000MCM 507 1000000
1111MCM 562 1111000
1250MCM 633 1250000
1500MCM 706 1500000
2000MCM 1013 2000000
Conductor
AWG/MCM mm2 Citcular mils
39 33 27
49 41 33
61 52 43
77 68 55
88 82 67
100 90 74
114 105 85
134 115 95
153 138 113
178 156 126
205 183 149
236 208 171
274 265 197
317 279 229
369 323 264
409 360 295
470 403 330
508 441 361
557 494 390
638 546 448
660 565 464
710 614 502
- - -
824 686 536
-
988
-
1128
1254
1473
Single Conductor Two Conductor Three Conductor Cable Cable Cable
(1) The following short current ratings are for cable normally operating at a maximum conductor temperature of 100(2) The theoretical temperature that arises in the conductor during a short circuit, which is used as a basis of the
calculation, is 250 in accordance with IEC 60724.(3) EPR and XLPE insulation are capable of withstanding of short term temperature up to 250(4) The short circuit current ratings for copper conductors given in the table are values for one second for other duration
the current may be calculated from the following formula;
lt = short circuit current for t second (kA)l1 = short circuit current for one second (kA)t = short circuit duration (second)
(5) The duration of the short circuit based on these assumptions should be between 0.2 sec. and 5 sec.
lt = l1
t
159 112 71 50 35
259 183 16 82 58
401 283 179 127 90
551 390 246 174 123
868 614 388 275 194
1,373 971 614 434 307
2,183 1,543 976 690 488
3,159 2,234 1,413 999 706
5,213 3,686 2,331 1,648 1,166
8,810 6,230 3,940 2,786 1,970
13,985 9,889 6,254 4,423 3,127
17,858 12,628 7,987 5,647 3,993
22,725 16,069 10,163 7,186 5,081
29,219 20,661 13,067 9,240 6,533
35,713 25,253 15,971 11,293 7,986
45,454 32,141 20,327 14,374 10,164
55,195 39,028 24,684 17,454 12,342
66,384 46,940 29,688 20,992 14,844
79,029 55,882 35,343 24,991 17,672
94,834 67,058 42,411 29,989 21,206
113,803 80,471 50,894 35,988 25,447
135,931 96,118 60,790 42,985 30,395
164,382 116,235 73,514 51,982 36,757
234,526 165,835 104,883 74,164 52,442
22
20
18
16
14
12
10
8
6
4
2
1
1/0
2/0
3/0
4/0
262
313
373
444
535
646
777
111
Short circuit current (A)
Short circuit duration (second)
0.1 0.2 0.5 1 2
AWGor
Kcmil
-
4) The above current-carrying capacities are for marine installations with cables arranged in a single bank per hanger andare 85% of the ICEA calculated values. Double banking of distribution-type cables should be avoided. For thoseinstances where cable must be double banked, the current-carrying capacities in the above table should be multipliedby 0.8.
5) The ICEA calculated current capacities of these cables are based on cables installed in free air, that is, at least onecable diameter spacing between adjacent cables.
6) Ampacity adjustment factors for more than 3 conductors in a cable with no load diversity:
4 through 6
7 through 9
10 through 20
21 through 30
31 through 40
41 through 60
Number of conductors
80
70
50
45
40
35
Percent of values in the above table for threeconductor cable as adjusted for ambienttemperature, if necessary
