TABLE T4 - MULTI-CORE CABLES HAVING XLPE or LSHF INSULATION, ARMOURED,
(COPPER CONDUCTOR) 600/1000V
  Ambient temperature: 30°C
Ground temperature: 15°C
CURRENT- CARRYING CAPACITY (AMP) Conductor operating temperature: 90°C
Size of Conductor
Reference Method 1
(clipped direct)
Reference Method 11
(on perforated cable tray)
or Method 13 (free air)
In single-way ducts
Laid direct in ground
1 two-core cable,
1 phase ac or dc
1 three or 4-core cable
3 phase ac
1 two-core cable,
1 phase ac or dc
1 three or 4-core cable
3 phase ac
1 two-core cable,
1 phase ac or dc
1 three or 4-core cable
3 phase ac
1 two-core cable,
1 phase ac or dc
1 three or 4-core cable,
3 phase ac
1
2
3
4
5
7
8
9
10
mm²
A
A
A
A
A
A
A
A
1.5
27
23
29
25
 
23
 
28
2.5
36
31
39
33
 
30
 
36
4
49
42
52
44
 
40
 
48
6
62
53
66
56
 
50
 
60
10
85
73
90
78
 
65
 
80
16
110
94
115
99
115
94
140
115
25
146
124
152
131
145
125
180
150
35
180
154
188
162
175
150
215
180
50
219
187
228
197
210
175
255
215
70
279
238
291
251
260
215
315
265
95
338
289
354
304
310
260
380
315
120
392
335
410
353
355
300
430
360
150
451
386
472
406
400
335
480
405
185
515
441
539
463
455
380
540
460
240
607
520
636
546
520
440
630
530
300
698
599
732
628
590
495
700
590
400
787
673
847
728
660
560
790
670
 
TABLE T4a
VOLTAGE DROP (PER AMP PER METER)
Size of Conductor
Two-core Cable, dc
Two-core cable,
1 phase, ac
3 or 4-core cable,
3 phase ac
Two-core cable,
1 phase ac
3 or 4-core cable,
3 phase ac
In ducts
In ground
In ducts
In ground
1
2
3
4
5
6
7
8
mm²
mV/A/m
mV/A/m
mV/A/m
mV/A/m
mV/A/m
mV/A/m
mV/A/m
1.5
31
31
27
31
31
25
25
2.5
19
19
16
19
19
15
15
4
12
12
10
12
12
9.7
9.7
6
7.9
7.9
6.8
7.9
7.9
6.5
6.5
10
4.7
4.7
4.0
4.7
4.7
3.9
3.9
16
2.9
2.9
2.5
2.9
2.9
2.6
2.6
 
 
r
x
z
r
x
z
 
 
 
 
25
1.85
1.85
0.16
1.9
1.6
0.14
1.65
1.9
1.9
1.6
1.6
35
1.35
1.35
0.155
1.35
1.15
0.135
1.15
1.35
1.35
1.2
1.2
50
0.98
0.99
0.155
1.00
0.86
0.135
0.87
1.00
1.00
0.87
0.87
70
0.67
0.67
0.150
0.69
0.59
0.130
0.60
0.69
0.69
0.61
0.61
95
0.49
0.50
0.150
0.52
0.43
0.130
0.45
0.52
0.52
0.45
0.45
120
0.39
0.40
0.145
0.42
0.34
0.130
0.37
0.42
0.42
0.36
0.36
150
0.31
0.32
0.145
0.35
0.28
0.125
0.30
0.35
0.35
0.30
0.30
185
0.25
0.26
0.145
0.29
0.22
0.125
0.26
0.29
0.29
0.25
0.25
240
0.195
0.20
0.140
0.24
0.175
0.125
0.21
0.24
0.24
0.21
0.21
300
0.155
0.16
0.140
0.21
0.140
0.120
0.185
0.21
0.21
0.19
0.19
400
0.120
0.13
0.140
0.19
0.115
0.120
0.165
0.19
0.19
0.18
0.18
Note: r = conductor resistance at operating temperature,
z = impedance, x = reactance