Page 448 - Acel Catalogue 2021-22

Useful Information - Current Carrying Capacity
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SWA Cables – 6942XLH, 6943XLH, 6944XLH
Multicore 90°C Armoured Thermosetting Insulated Cables (COPPER CONDUCTORS)
CURRENT - CARRYING CAPACITY (amperes)
Conductor Cross Sectional Area
Reference Method C (clipped direct)
Reference Method E (in free air or on a perforated cable tray etc, horizontal or vertical)
Reference Method D (direct in ground or in ducting in ground, in or around buildings)
1 two-core cable single-phase a.c. or d.c.
1 three-or 1 four- core cable, three- phase a.c.
1 two-core cable single-phase a.c. or d.c.
1 three-or 1 four- core cable, three- phase a.c.
1 two-core cable single-phase a.c. or d.c.
1 three-or 1 four- core cable, three- phase a.c.
1
2
3
4
5
6
7
(mm2)
(A)
(A)
(A)
(A)
(A)
(A)
1.5
27
23
29
25
25
21
2.5
36
31
39
33
33
28
4
49
42
52
44
46
36
6
62
53
66
56
53
44
10
85
73
90
78
71
58
16
110
94
115
99
91
75
25
146
124
152
131
116
96
35
180
154
188
162
139
115
50
219
187
228
197
164
135
70
279
238
291
251
203
167
95
338
289
354
304
239
197
120
392
335
410
353
271
223
150
451
386
472
406
306
251
185
515
441
539
463
343
281
240
607
520
636
546
395
324
300
698
599
732
628
446
365
400
787
673
847
728
-
-
NOTES:
• Where a conductor operates at a temperature exceeding 70°C it must be ascertained that the equipment connected to the con-
ductor is suitable for the conductor operating temperature (see Regulation 512.1.2)
• Where cables in this table are connected to equipment or accessories designed to operate at a temperature not exceeding 70°C,
the current ratings given in the equivalent table for 70°C thermoplastic insulated cables (Table 4D4A) must be used (see also Regulation 523.1)
VOLTAGE DROP (per ampere per metre)
Conductor Cross Sectional Area
Two-core cable d.c.
Two-core cable, single-phase a.c.
Three- or four-core cable, three-phase a.c.
1
2
3
4
(mm2)
(mV/A/m)
(mV/A/m)
(mV/A/m)
1.5
31
31
27
2.5
19
19
16
4
12
12
10
6
7.9
7.9
6.8
10
4.7
4.7
4
16
2.9
2.9
2.5
r
x
z
r
x
z
25
1.85
1.85
0.16
1.9
1.6
0.14
1.65
35
1.35
1.35
0.155
1.35
1.15
0.135
1.15
50
0.98
0.99
0.155
1
0.86
0.135
0.87
70
0.67
0.67
0.15
0.69
0.59
0.13
0.6
95
0.49
0.5
0.15
0.52
0.43
0.13
0.45
120
0.39
0.4
0.145
0.42
0.34
0.13
0.37
150
0.31
0.32
0.145
0.35
0.28
0.125
0.3
185
0.25
0.26
0.145
0.29
0.22
0.125
0.26
240
0.195
0.2
0.14
0.24
0.175
0.125
0.21
300
0.155
0.16
0.14
0.21
0.14
0.12
0.185
400
0.12
0.13
0.14
0.19
0.115
0.12
0.165
DISCLAIMER: This information has been supplied in good faith and the upmost care has been taken to ensure the data is accurate in its derivation from BS 7671.
However, this information should not be considered as a substitute for BS 7671, which should always be referred to. It remains the responsibility of the user to ensure all data and assumptions are correct and that any cable used is suitable for its intended purpose.
For more information visit www.electric-center.co.uk
448
Section 11 - Useful Information & Index
Section 11 - Useful Information & Index