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PVC Insulated Power Cables & Wires
Description

INTRODUCTION:
Polyvinyl chloride compound (PVC) with its inherit characterstic of toughness and flexibility over a wide temperature range is used in the manufacture of cables. PVC cables are largely used for industrial type application. They are simple to terminate & joint, handle and have significant record of trouble-free service.

All the cables design described comply to BS 6346: "PVC insulated cable for electricity Supply" which specifies requirement for cable for operation at voltages upto and including 3300 volts. It includes armoured as well as unarmoured cables.

CABLE CONSTRUCTION:
Cables are manufactured to British Standard Specification (BSS) 6346: However cables can be manufactured to all other international standards and to any special specification and customer requirements.

CONDUCTORS: STRANDED COPPER:
These are high conductivity conductors which meet the requirements of BS 6360: "Copper Conductors in insulated cables and cords (metric units) " . Where possible conductors are shaped­compacted to reduce overall cable dimensions and give a smooth profile, While compacting number and size of wire are changed, therefore conductor sizes should be designated by nominal cross sectional area rather than by stranding configuration.

STRANDED ALUMINIUM:
These are high purity Aluminium and except for single core and the smallest size the conductors are shaped to produce the most compact design. The material properties and resistance are given in BS 6791: Aluminium Conductors in insulated cables (metric unit)".

INSULATION:
This consists of extruded, PVC conforming to BS 6746: "PVC Insulation and sheath of Electric Cables"
CORE IDENTIFICATION:
Core identification is by colour as follows:
NUMBER OF CORE: CORE COLOURS:
Single Red or Black
Two Red, Black
Three Red, Yellow, Blue
Four Red, Yellow, Blue, Black

Black denotes the neutral and colours are phase conductors.

Fillers/binder tape:
Polyproplyne fillers are included between laid up cores to give smooth profile and polyproplane
tape as a binder is used over laid up cores.

 BEDDING:
The bedding consists of an extruded layer of PVC compound complying with BS 6746:

ARMOUR:
With all armoured cables the direction of lay of the armour is left hand and the size of the armour is as specified. For multi core cables the armour is a single layer of galvanised steel wires_ Single core cables for use on a.c. Circuits are armoured with non magnetic material eg, aluminium.

FINISH AND FINAL PROTECTIVE COVERING
The final protective covering for all cables consists of an extruded, black (unless specified) PVC oversheath which conforms to BS 6346: for thickness and to BS 6746: for properties.
The external surface is embossed with the voltage designation.

ELECTRICAL TESTING:
At the insulation stage all cores are spark tested according to conductor size & cable voltage. Finished cables have to pass a.c. Voltage withstand test.

PACKING
Cables are packed on wooden drums of suitable size to meet minimum bending radius criteria. Drums are duly lagged to protect cable being damaged during transportation. For convenience at the installation sites drums are marked with the "Direction of Rotation" instruction. To prevent ingress of moisture both ends of cable are capped and the ends are marked red and green. At red mark the sequence of cores is clock wise i.e. Red, Yellow, Blue & Black. At green mark the sequence of cores is counter clock wise i.e. Black, Yellow, Red.



600/1 OOOV - SINGLE CORE
STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES.
(Cu/PVC/PVC)
NOMINAL AREA
OF CONDUCTOR		 THICKNESS OF
INSULATION		 THICKNESS OF
OUTER SHEATH		 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE WEIGHT
Sq mm mm mm mm Kg/10.0mm
1.0*
1.5*
1.5
2.5*
2.5
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
0.6
0.6
0.6
0.7
0.7
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
0.8
0.8
0.8
0.8
0.8
0.8
0.9
1.4
1.4
1.4
1.4
1.4
1.4
1.5
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.5
4.0
4.5
4.5
5.0
5.0
6.3
6.8
8.1
11.1
12.9
14.0
15.1
16.9
19.4
21.0
23.2
25.8
29.0
32.1
35.8
39.6
43.8
48.3
53.7
5.5
6.2
6.4
7.5
7.7
10.5
13.0
17.5
24.0
34.5
45.0
60.0
81.0
110.0
135.0
165.0
206.0
267.0
332.0
419.0
523.0
663.0
833.0
1044.0

*SOLID CONDUCTORS
CABLE CONFORMS TO BS 6346: & IEC 502­
600/1000V SINGLE CORE
STRANDED COPPER CONDUCTOR PVC INSULATED ALUMINUM WIRE ARMOURED
PVC SHEATHED CABLES
(Cu/PVC/AWAlPVC)
NOMINAL
AREA OF CONDUCTOR		 THICKNESS
OF
INSULATION		 THICKNESS
OF
EXTRUDED BEDDING		 ARMOUR
WIRE
DIAMETER		 THICKNESS
OF
OVERSHEATH		 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE WEIGHT
Sq mm mm mm mm mm mm Kg/100m
50
70
95
120
150
185
240
300
400
500
630
800
1000
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
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.2
1.2
1.2
1.4
1.4
1.25
1.25
1.25
1.6
1.6
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
1.5
1.6
1.6
1.7
1.7
1.8
1.9
1.9
2.1
2.1
2.2
2.4
2.5
19.1
21.1
23.4
26.3
28.3
30.8
34.1
37.0
42.0
45.6
49.7
55.8
61.0
78
103
133
168
200
243
309
377
483
592
742
950
1176

CABLE CONFORMS TO BS 6346
600/1 OOOV - SINGLE CORE
STRANDED ALUMINIUM CONDUCTOR
PVC INSULATED PVC SHEATHED CABLES
(AL/PVC/PVC)
NOMINAL AREA
OF CONDUCTOR 		THICKNESS OF
INSULATION 		THICKNESS OF
OVERSHEATH		 APPROXIMATE
OVERALL
DIAMETER 		APPROXIMATE
CABLE
WEIGHT
Sq mm mm mm mm Kg/100m
50
70
95
120
150
185
240
300
400
500
630
800
1000
1.4
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
2.8
2.8
2.8
3.0
1.4
1.4
1.5
1.5
1.6
1.7
1.8
1.9
2.0
2.1
2.2
2.3
2.5
15.1
16.9
19.4
21.0
23.2
25.8
29.0
32.1
35.8
39.6
43.8
48.3
53.7
28
36
48
57
69
86
109
134
167
206
244
294
375

600/1 OOOV - SINGLE CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
ALUMINIUM WIRE ARMOURED
PVC SHEATHED CABLES
(AL/PVC/ AWA/PVC)
NOMINAL
AREA OF CONDUCTOR		 THICKNESS
OF
INSULATION		 THICKNESS
OF
EXTRUDED BEDDING		 ARMOUR
WIRE
DIAMETER		 THICKNESS
OF
OVERSHEATH		 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE WEIGHT
Sq mm mm mm mm mm mm Kg/100m
50
70
95
120
150
185
240
300
400
500
630
800
1000

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
0.8
0.8
0.8
1.0
1.0
1.0
1.0
1.0
1.2
1.2
1.2
1.4
1.4
1.25
1.25
1.25
1.6
1.6
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
1.5
1.6
1.6
1.7
1.7
1.8
1.9
1.9
2.1
2.1
2.2
2.4
2.5
19.1
21.1
23.4
26.3
28.3
30.8
34.1
37.0
42.0
45.6
49.7
55.8
61

66

79

95

125

143

166

198

230

303

355

404

515

624

600/1000V - TWO CORE
STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
NOMINAL AREA OF CONDUCTOR THICKNESS OF INSULATION UN ARMOURED ARMOURED
APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT ARMOUR WIRE DIAMETER APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT
Sq mm mm mm Kg/100m mm mm Kg/100m
1.5*
2.5*
4**
6**
10**
16
25
35
50
70
95
120
150
185
240
300
400
0.6
0.7
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
-
-
-
-
-
15.6
18.4
20.1
22.8
25.5
29.3
31.8
35.1
39.1
43.9
48.7
54.2
-
-
-
-
-
47
69
95
126
170
231
288
352
439
576
716
904
0.9
0.9
0.9
0.9
1.25
1.25
1.6
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
2.5
2.5
11.7
13.1
15.1
16.5
20.1
18.9
23
24.9
27.8
30.4
35.5
38.0
41.3
46.4
51.2
56.4
61.9
28
35
46
55
88
84
128
161
201
252
352
420
496
639
802
971
1185

*CIRCULAR SOLID CONDUCTOR
**CIRCULAR STRANDED CONDUCTORS. CONDUCTORS OF 16 Sq mm AND ABOVE ARE SHAPED STRANDED.
600/1 OOOV - TWO CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (AL/PVC/SWA/PVC)
NOMINAL AREA OF CONDUCTOR THICKNESS OF INSULATION UN ARMOURED ARMOURED
APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT ARMOUR WIRE DIAMETER APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT
Sq mm mm mm Kg/100m mm mm Kg/100m
16
25
35
50
70
95
120
150
185
240
300
400
1.0
1.2
1.2
1.4
1.4
1.6
1.6
1.8
2.0
2.2
2.4
2.6
15.6
18.4
20.1
22.8
25.5
29.3
31.8
35.1
39.1
43.9
48.7
54.2
23
38
53
69
87
116
137
165
206
270
332
413
1.25
1.6
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
2.5
2.5
18.9
23.0
24.9
27.8
30.4
35.5
38.0
41.3
46.4
51.2
56.4
61.9
65
98
119
144
170
238
271
311
406
496
587
694

CONDUCTORS ARE SHAPED STRANDED
600/1 OOOV - THREE CORE
STRANDED COPPER CONDUCTOR PVC INSULATED PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
NOMINAL AREA OF CONDUCTOR THICKNESS OF INSULATION UN ARMOURED ARMOURED
APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT ARMOUR WIRE DIAMETER APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT
Sq mm mm mm Kg/100m mm mm Kg/100m
1.5*
2.5*
4**
6**
10**
16
25
35
50
70
95
120
150
185
240
300
400
0.6
0.7
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
-
-
-
-
-
17.2
20.4
22.4
25.5
28.7
33.3
36.3
40.0
44.6
50.1
55.6
62.0
-
-
-
-
-
67
100
130
172
236
333
410
502
626
815
1014
1286
0.9
0.9
0.9
1.25
1.25
1.25
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
12.3
13.6
15.8
18.0
21.2
20.6
25.0
27.3
30.5
35.0
39.3
42.2
47.5
51.9
57.8
63.2
69.6
31
39
52
73
101
108
167
205
258
359
471
559
711
854
1079
1304
1602

*CIRCULAR SOLID CONDUCTOR
**CIRCULAR STRANDED CONDUCTORS. CONDUCTORS OF 16 Sq mm AND ABOVE ARE SHAPED STRANDED.
600/1000V - TWO CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (AL/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (AL/PVC/SWA/PVC)
NOMINAL
AREA
OFCONDUCTOR		 THICKNESS
OF
INSULATION		 UN ARMOURED ARMOURED
APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE
WEIGHT		 ARMOUR
WIRE
DIAMETER		 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE
WEIGHT
Sq mm mm mm Kg/ 100m mm mm Kg/100m
16
25
35
50
70
95
120
150
185
240
300
1.0
1.2
1.2
1.4
1.4
1.6
1.6
1.8
2.0
2.2
2.4
17.2
20.4
22.4
25.5
28.7
33.3
36.3
40.0
44.6
50.1
55.6
38
54
66
90
112
160
182
235
290
344
460
1.25
1.6
1.6
1.6
2.0
.2.0
2.0
2.5
2.5
2.5
2.5
20.6
25.0
27.3
30.5
35.0
39.3
42.2
47.5
51.9
57.8
63.2
79
121
142
176
236
299
342
446
520
640
752

CONDUCTORS ARE SHAPED STRANDED
600/1000V - FOUR CORE
STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
NOMINAL
AREA OF
CONDUCTOR		 THICKNESS
OF INSULATION		 UN ARMOURED ARMOURED
APPROXIMATE
OVERALL DIAMETER		 APPROXIMATE
CABLE
WEIGHT		 ARMOUR
WIRE
DIAMETER		 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE
WEIGHT
Sq mm mm mm Kg/100m mm mm Kg/100m
1.5*
2.5*
4**
6**
10**
16
25
35
50
70
95
120
150
185
240
300
400
0.6
0.7
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
-
-
-
-
-
19.3
22.9
25.4
29.2
33.0
38.3
41.8
46.3
51.3
58.0
64.6
72.0
-
-
-
-
-
86
129
169
225
310
436
538
663
825
1073
1338
1693
0.9
0.9
1.25
1.25
1.25
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
3.15
13.3
14.5
17.8
19.2
22.8
23.9
27.8
30.5
35.4
39.2
44.3
49.3
53.6
59.0
65.7
72.0
81.3
35
44
71
85
120
149
205
253
348
447
590
754
987
1089
1369
1661
2148

*CIRCULAR SOLID CONDUCTOR
**CIRCULAR STRANDED CONDUCTORS. CONDUCTORS OF 16 Sq mm AND ABOVE ARE
SHAPED STRANDED.
600/1000V - FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (ALlPVC/PVC)
AND SINGLE (STEEL) WIRE ARMOURED
PVC SHEATHED CABLES (ALlPVC/SWA/PVC)
NOMINAL AREA OF CONDUCTOR THICKNESS OF INSULATION UN ARMOURED ARMOURED
APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT ARMOUR WIRE DIAMETER APPROXIMATE OVERALL DIAMETER APPROXIMATE CABLE WEIGHT
Sq mm mm mm Kg/100m mm mm Kg/100m
16
25
35
50
70
95
120
150
185
240
300
1.0
1.2
1.2
1.4
1.4
1.6
1.6
1.8
2.0
2.2
2.4
19.3
22.9
25.4
29.2
33.0
38.3
41.8
46.3
51.3
58.0
64.6
48
64
84
113
145
206
248
306
378
485

599
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
23.9
27.9
30.5
35.4
39.2
44.3
49.3
53.6
59.0
65.7
72.0
111
144
169
240
283
361
465
542
644
783
924

CONDUCTORS ARE SHAPED STRANDED
600/1000V - ( 3 1/2 CORE)
STRANDED COPPER CONDUCTOR PVC INSULATED CONDUCTOR ( 3 1/2 CORE)
PVC SHEATHED CABLES (Cu/PVC/PVC)
AND SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)

NOMINAL
AREA OF
CONDUCTOR
NOMINAL
AREA OF
NEUTRAL
CONDUCTOR		 UN ARMOURED ARMOURED
THICKNESS
OF
INSULATION 		APPROXIMATE
OVER ALL
DIAMETER 		APPROXIMATE
CABLE
WEIGHT 		ARMOUR
WIRE
DIAMETER 		APPROXIMATE
OVER ALL
DIAMETER 		APPROXIMATE
CABLE
WEIGHT
Sq mm Sq mm mm mm Kg/100m mm mm Kg/100m
25
35
50
70
95
120
150
185
240
300
300
400
16
16
25
35
50
70
70
95
120
150
185
185
1.2
1.2
1.4
1.4
1.6
1.6
1.8
2.0
2.2
2.4
2.4
2.6
22.9
24.7
28.3
32.0
37.5
41.4
44.7
49.9
56.0
62.2
64.2
69.6
126
159
212
289
392
489
590
740
959
1191
1219
1507
1.6
1.6
1.6
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
3.15
27.8
29.5
33.1
38.0
43.7
49.0
52.0
57.2
63.7
69.8
71.8
78.6
202
243
305
422
456
699
818
991
1247
1508
1536
1947

ALL PHASE CONDUCTORS ARE SHAPED STRANDED
ALL NETURAL CONDUCTORS ARE CIRCULAR STRANDED
1900/3300V- SINGLE CORE
STRANDED COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLE (Cu/PVC/PVC)
AND SINGLE ALUMINIUM WIRE ARMOURED
PVC SHEATHED CABLE (Cu/PVC/AWA/PVC)
NOMINAL
AREA OF
CONDUCTOR		 THICKNESS
OF INSULATION		 UN ARMOURED   ARMOURED  
ARMOUR
WIRE
DIAMETER		 APPROXIMATE
CABLE
WEIGHT
APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE
WEIGHT		 APPROXIMATE
OVERALL
DIAMETER
Sq mm mm mm Kg/100m mm mm Kg/100m
50
70
95
120
150
185
240
300
400
500
630
800
1000
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.4
2.6
2.8
2.8
2.8
3.0
16.8
18.8
20.7
22.6
24.1
26.2
29.0
32.1
35.8
39.6
43.8
48.3
53.7
66
89
116
143
171
209
267
332
419
523
663
833
1044
1.25
1.25
1.6
1.6
1.6
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
21.0
22.8
26.0
27.6
29.4
31.3
34.1
37.0
42.0
45.6
49.7
55.8
61
87
111
149
177
207
247
309
377
483
592
742
850
1176

CONDUCTORS ARE SHAPED STRANDED
1900/3300V - SINGLE CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED PVC SHEATHED CABLES (ALlPVC/PVC)
AND SINGLE ALUMINIUM WIRE ARMOURED
PVC SHEATHED CABLES (ALlPVC/AWNPVC)
NOMINAL
AREA OF
CONDUCTOR		 THICKNESS
OF
INSULATION		 UN ARMOURED ARMOURED
APPROXIMATE
OVERALL DIAMETER		 APPROXIMATE
CABLE
WEIGHT		 ARMOUR
WIRE
DIAMETER		 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE
WEIGHT
Sq mm mm mm Kg/100m mm mm Kg/100m
50
70
95
120
150
185
240
300
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.4
16.8
18.8
20.7
22.6
24.1
26.2
29.0
32.1
34
44
54
63
74
88
109
134
1.25
1.25
1.6
1.6
1.6
1.6
1.6
1.6
21
22.8
26
27.6
29.4
31.3
34.1
37
77
90
122
136
151
170
198
230

CONDUCTORS ARE CIRCULAR STRANDED
1900/3300V - THREE CORE
STRANDED COPPER CONDUCTOR PVC INSULATED
SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWNPVC)
NOMINAL AREA
OF CONDUCTOR 		THICKNESS OF
INSULATION

ARMOUR
WIRE
DIAMETER

 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE WEIGHT
Sqmm mm mm mm Kg/100 m
16
25
35
50
70
95
120
150
185
240
300
400
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.4
2.6
1.6
1.6
1.6
2.0
2.0
2.0
2.5
2.5
2.5
2.5
2.5
2.5
27.6
29.9
32.1
35.6
38.9
42.3
46.6
49.4
52.8
57.8
63.2
69.6
175
215
257
333
414
511
645
743
873
1083
1309
1609

CONDUCTORS ARE CIRCULAR STRANDED
1900/3300V - THREE CORE
ALUMINIUM STRANDED CONDUCTOR PVC INSULATED
SINGLE STEEL WIRE ARMOURED
PVC SHEATHED CABLES (Cu/PVC/SWNPVC
NOMINALAREA
OF CONUCTOR		 THICKNESS OF
INSULATION		 ARMOUR WIRE
DIAMETER		 APPROXIMATE
OVERALL
DIAMETER		 APPROXIMATE
CABLE
WEIGHT
Sq mm mm mm mm Kg/100 m
16
25
35
50
70
95
120
150
185
240
300
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.2
2.4
1.6
1.6
1.6
2
2
2
2.5
2.5
2.5
2.5
2.5
27.6
29.9
32.1
35.6
38.9
42.3
46.6
49.4
52.8
57.8
63.2
134
154
177
228
265
309
390
434
490
586
688

CONDUCTORS ARE SHAPED STRANDED
CURRENT RATINGS FOR CABLES INSTALLED IN AIR
600/1 OOOV - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (Cu/PVC/SWAlPVC)
NOMINAL
AREA OF
CONDUCTOR

SINGLE CORE*

TWO CABLES SPACED+

   TWO CORE THREE & FOUR CORE
THREE CABLES
TREFOIL TOUCHING		    
CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE
Sqmm AMPERE mV AMPERE mV AMPERE mV AMPERE mV
1.5*
2.5*
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
-
-
-
-
-
-
-
-
205
255
310
360
405
460
530
600
660
730
820
880
960
-
-
-
-
-
-
-
-
0.96
0.69
0.54
0.46
0.41
0.36
0.36
0.33
0.30
0.28
0.26
0.24
0.22
-
-
-
-
-
-
-
-
180
230
280
325
370
425
500
570
640
720
810

870
940
-
-
-
-
-
-
-
-
0.81
0.57
0.43
0.36
0.31
0.26
0.23
0.2
0.19
0.18
0.16
0.16
0.15
21
30
39
50
69
90
120
150
175
220
270
310
355
410
485
550
620
-
-
-
-
28
17
11
7.4
4.4
2.8
1.7
1.3
0.94
0.66
0.49
0.40
0.34
0.29
0.24
0.21
0.19
-
-
-
-
19
25
33
43
59
77
100
125
155
190
235
270
310
355
420
475
550
-
-
-
-
25
15
19.6
6.4
3.8
2.4
1.5
1.1
0.82
0.57
0.42
0.35
0.29
0.25
0.21
0.18
0.17
-
-
-
-

* ALUMINIUM ARMOURED
** CIRCULAR SOLID CONDUCTOR
DISTANCE BETWEEN CABLE CENTRES: UPTO & INCLUDING 185 Sq mm SHALL BE TWICE THE CABLE DIAMETER
and 240 Sq mm AND ABOVE - 90 mm
CURRENT RATINGS FOR CABLES INSULATED IN AIR
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (ALlPVC/SWA/PVC)
NOMINAL
AREA OF
CONDUCTOR

SINGLE CORE*

TWO CABLES SPACED+

   TWO CORE THREE & FOUR CORE
THREE CABLES
TREFOIL TOUCHING		  
CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE
Sqmm AMPERE mV AMPERE mV AMPERE mV AMPERE mV
16
25
35
50
70
95
120
150
185
240
300
380
480
600
740
960
1200
-
-
-
155
190
235
270
305
350
420
475
520
590
650
710
800
880
-
-
-

1.5
1.1
0.81
0.67
0.57
0.59
0.44
0.39
0.35
0.32
0.30
0.28
0.25
0.23
-
-
-
135
170
210
245
280
320
375
430
495
560
630
710
790
870
-
-
-
1.3
0.92
0.68
0.55
0.46
0.38
0.31
0.26
0.24
0.21
0.19
0.18
0.17
0.16
68
90
110
130
165
195
-
-
-
-
-
-
-
-
-
-
-
4.5
2.9
2.1
1.5
1.1
0.79
-
-
-
-
-
-
-
-
-
-
-
58
78
93
110
145
175
205
235
270
320
370
-
-
-
-
-
-
3.9
2.5
1.8
1.3
0.93
0.68
0.54
0.45
0.37
0.29
0.25
-
-
-
-
-
-

* ALUMINIUM WIRE ARMOURED
* DISTANCE BETWEEN CABLE CENTRES: UPTO & INCLUDING 185 mm2 - SHALL BE TWICE THE CABLE DIAMETER 240 mm2 & ABOVE - 90 MM.
BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:

AMBIENT AIR TEMPERATURE.......................................................... 30 ° C
MAXIMUM CONDUCTOR OPERATING
TEMPERATURE AT RATED CURRENT...............................................70 ° C

 METHOD OF INSTALLATION:

Cables shall only be continuously operated at their full rating if the minimum current at which circuit protection is designed to operate does not exceed 1.5 times the values tabulated.

EFFECT OF GROUPING OF CABLES:

Single core cables installed in the manner indicated in the tabes. Twin and multicore installed in "defined conditions" in accordance with the lEE Wiring Regulations.

No reduction in rating is necessary providing that:

1. The horizontal clearance between circuit is
(A) Not less than six times the overall diameter of an individual cable
(b) Not less than the overall width of an individual circuit, except that the horizontal clearance need not in any case exceed 150 mm.
2.The vertical clearance between circuits is not less than 150 mm.
3. If the number of circuits exceeds 4, they are installed in a horizontal plane.
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES

AMBIENT AIR TEMPERATURE °C 23 35 40 45 50
RATING FACTOR 1.08 0.94 0.86 0.77 0.70

For the other conditions of installation, reference should be made to ERA
CURRENT RATINGS FOR CABLES INSTALLED IN AIR
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC SHEATHED CABL_S (CU/PVC/PVC
NOMINAL
AREA OF
CONDUCTOR		 SINGLE CORE TWO CORE THREE & FOUR CORE
TWO CABLES
SPACED* 		THREE CABLES
TREFOIL TOUCHING 		LAID*
FLAT SPACED
CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE
Sqmm AMPERE mV AMPERE mV AMPERE mV AMPERE mV AMPERE mV
16*
25
35
50
70
95
120
150
185
240
300

400
500
730
800
1000
-
-
-
190
245
300
355
410
475
590
680
790
990
1050
1200
1330
-
-
-
0.95
0.68
0.52
0.44
0.39
0.35
0.36
0.33
0.30
0.28
0.26
0.24
0.22
-
-
-
170
220
270
310
360
420
495
580
660
760
770
990
1100
-
-
-
0.80
0.57
0.42
0.35
0.29
0.25
0.21
0.19
0.17
0.16
0.15
0.15
0.14
-
-
-
185
235
300
345
395
460
590
580
780
890
1030
1170
1290
-
-
-
0.83
0.60
0.47
0.40
0.35
0.33
0.32
0.31
0.28
0.27
0.25
0.23
0.22
86
115
145
170
220
265
305
350
400
475
550
630
-
-
-
-
2.8
1.7
1.3
0.94
0.66
0.49
0.40
0.34
0.29
0.24
0.21
0.19
-
-
-
-
73
98
120
150
185
230
265
300
350
415
475
550
-
-
-
-
2.4
1.5
1.1
0.82
0.57
0.42
0.35
0.29
0.25
0.21
0.18
0.17
-
-
-
-

* DISTANCE BETWEEN CABLE CENTRES: UPTO AND INCLUDING 185 Sq mm SHALL BE TWICE THE CABLE DIAMETER 240 Sq mm AND ABOVE - 90 mm.
CURRENT RATINGS FOR CABLES INSTALLED IN AIR
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (ALlPVC/PVC)
NOMINAL
AREA OF
CONDUCTOR		 SINGLE CORE TWO CORE THREE & FOUR CORE
TWO CABLES
SPACED* 		THREE CABLES
TREFOIL TOUCHING 		LAID*
FLAT SPACED
CURRENT
RATING		 APPROXIMATE
VOLT DROP PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP PER AMPERE
PER METREE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP PER AMPERE
PER METRE
Sqmm AMPERE mV AMPERE mV AMPERE mV AMPERE mV AMPERE mV
16
25
35
50
70
95
120
150
185
240
300
380
480
600
740
960
1200
-
-
-
145
180
225
260
300
350
440
500
580
670
760
870
1020
1150
-
-
-
1.5
1.1
0.8
0.65
0.55
0.46
0.43
0.38
0.35
0.32
0.29
0.27
0.25
0.17
-
-
-
125
165
200
235
265
310
370
430
495
580
650
750
880
1000
-
-
-
1.3
0.9
0.67
0.54
0.45
0.37
0.3
0.25
0.23
0.2
0.18
0.17
0.16
0.15
-
-
-
140
175
220
255
295
340
440
500
580
660
750
860
1000
1130
-
-
-
1.3
0.95
0.72
0.6
0.51
0.45
0.43
0.39
0.37
0.3
0.28
0.26
0.24
0.23
65
86
105
125
160
195
-
-
-
-
-
-
-
-
-
-
-
4.5
2.9
2.1
1.5
1.1
0.79
-
-
-
-
-
-
-
-
-
-
-
56
74
91
110
140
170
200
230
260
310
360
-
-
-
-
-
-
3.9
2.5
1.8
1.3
0.93
0.68
0.54
0.45
0.37
0.29
0.25
-
-
-
-
-
-

* DISTANCE BETWEEN CABLE CENTRES: UPTO AND INCLUDING 185 Sq mm SHALL BE TWICE THE CABLE DIAMETER 240 Sq mm AND ABOVE - 90 mm.
BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES

AMBIENT AIR TEMPERATURE °C 23 35 40 45 50
RATING FACTOR 1.08 0.94 0.86 0.77 0.70

For the other conditions of installation, reference should be made to ERA
CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND
600/1000V - SINGLE, TWIN, THREE AND FOUR CORES
STRANDED COPPER CONDUCTOR PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
NOMINAL
AREA OF
CONUCTOR		 SINGLE CORE** TWO CORE   THREE & FOUR CORE
TWO CABLES TOUCHING THREE CABLES
TREFOIL TOUCHING
CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXIMATE
VOLT DROP
PER AMPERE
PER METRE
Sq mm2 AMPERE mV AMPERE mV AMPERE mV AMPERE mV
1.5*
2.5*
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
-
-
-
-
-
-
-
-
235
290
345
390
440
490
570
630
700
770
850
890
940
-
-
-
-
-
-
-
-
0.93
0.66
0.5
0.41
0.36
0.3
0.26
0.23
0.22
0.2
0.19
0.18
0.18
-
-
-
-
-
-
-
-
200
245
295
335
370
415
480
530
590
640
710
740
780
-
-
-
-
-
-
-
-
0.81
0.57
0.43
0.36
0.31
0.26
0.23
0.2
0.19
0.18
0.16
0.16
0.15
30
40
53
66
88
115
150
185
215
270
320
365
410
465
540
600
670
-
-
-
-
28
17
11
7.4
4.4
2.8
1.7
1.3
0.94
0.66
0.49
0.4
0.34
0.29
0.24
0.21
0.19
-
-
-
-
26
34
45
57
75
98
130
155
185
225
270
310
345
390
455
510
570
-
-
-
-
25
15
9.6
6.4
3.8
2.4
1.5
1.1
0.82
0.57
0.42
0.35
0.29
0.25
0.21
0.18
0.17
-
-
-
-

*CIRCULAR SOLID CONDUCTORS
 ** ALUMINIUM WIRE ARMOURED
 
 
 
CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (ALlPVC/SWA/PVC)
NOMINAL
AREA OF
CONUCTOR		 SINGLE CORE** TWO CORE   THREE & FOUR CORE
TWO CABLES TOUCHING THREE CABLES
TREFOIL TOUCHING
CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE
Sq mm2 AMPERE mV AMPERE mV AMPERE mV AMPERE mV
16
25
35
50
70
95
120
150
185
240
300
380
480
600
740
960
1200
-
-
-
180
220
265
300
335
380
440
495
550
610
680
730
810
880
-
-
-
1.5
1.1
0.79
0.64
0.53
0.44
0.36
0.31
0.28
0.25
0.23
0.21
0.2
0.19
-
-
-
155
190
225
255
285
325
375
420
465
520
570
620
680
730
-
-
-
1.3
0.92
0.68
0.55
0.46
0.38
0.31
0.27
0.24
0.21
0.2
0.18
0.17
0.16
88
115
140
165
200
235
-
-
-
-
-
-
-
-
-
-
-
4.5
2.9
2.1
1.5
1.1
0.79
-
-
-
-
-
-
-
-
-
-
-
75
97
115
140
170
205
235
265
300
350
395
-
-
-
-
-
-
3.9
2.5
1.8
1.3
0.93
0.68
0.54
0.45
0.37
0.29
0.25
-
-
-
-
-
-

* ALUMINIUM WIRE ARMOURED
BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:

Ground thernal resistivity............................... 1.2 oC m/W
Ground Temperature......................................... 1.5 oC m/W
Depth of laying............................... O.5 meter (to the centre of cable or trefoil group of cables)
Maximum operating
conductor temperature
at rated current...................... 70°C

Cables shall only be continuously operated at their full rating if the minimum current at which circuit protection is designed to operate does not exceed 1.3 times the values tabulated.

 METHOD OF INSTALLATION:
Cables installed in the manner indicated in the tables.

EFFECT OF GROUPING OF CABLES:
The current ratings given apply to one, twin or multi core cable, or a single set of single core cables forming a circuit. When two or more circuits are laid in closed proximity the ratings of the cables must be reduced by the group rating factors in ERA report.
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES
GROUND TEMPERATURE °C 20 25 30 35
RATING FACTOR 0.95 0.95 0.85 0.79

For the other conditions of installation, reference should be made to ERA
CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (CU/PVC/PVC)
NOMINAL
AREA OF
CONDUCTOR		 SINGLE CORE TWO CORE THREE AND FOUR
CORE
TWO CABLES
TOUCHING		 SPACED* THREE CABLES
TREFOIL OR LAID
FLAT TOUCHING 		LAND FLAT
SPEACED*
CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING

APPROX.
VOLT DROP
PER AMPERE
PER METRE

 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE
Sq mm AMPERE mV AMPERE mV AMPERE TERFOIL mV

FLAT mV

 AMPERE mV AMPERE mV AMPERE mV
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
-
-
-
235
290
345
395
445
500
580
660
750
840
950
1050
1150
-
-
-
0.93
0.65
0.49
0.4
0.34
0.29
0.24
0.22
0.2
0.19
0.17
0.17
0.16
-
-
-
240
300
355
410
455
520
600
680
780
880
1010
1140
1270
-
-
-
0.95
0.68
0.52
0.44
0.39
0.35
0.31
0.29
0.27
0.26
0.25
0.25
0.24
-
-
-
200
245
295
335
375
425
490
550
630
700
780
860
940
-
-
-
0.8
0.57
0.42
0.35
0.29
0.25
0.21
0.19
0.17
0.16
0.15
0.15
0.14
-
-
-
0.81
0.57
0.43
0.36
0.31
0.27
0.23
0.21
0.2
0.18
0.18
0.17
0.17
-
-
-
210
260
310
355
395
450
520
590
680
760
870
980
1090
-
-
-
0.83
0.6
0.47
0.4
0.35
0.32
0.29
0.27
0.26
0.25
0.24
0.24
0.24
115
150
185
215
270
320
365
410
465
540
610
690
-
-
-
-
2.8
1.7
1.3
0.94
0.66
0.49
0.4
0.34
0.29
0.24
0.21
0.19
-
-
-
-
98
130
155
185
225
270
310
345
390
455
510
580
-
-
-
-
2.4
1.5
1.1
0.82
0.57
0.42
0.35
0.29
0.25
0.21
0.18
0.17
-
-
-
-

* ADJACENT CABLE SURFACES SEPARATED BY ONE CABLE DIAMETER.
CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES (ALlPVC/PVC)
NOMINAL
AREA OF
CONDUCTOR		 SINGLE CORE TWO CORE THREE AND FOUR
CORE
TWO CABLES
TOUCHING		 SPACED* THREE CABLES
TREFOIL OR LAID
FLAT TOUCHING 		LAND FLAT
SPEACED*
CURRENT
RATING		 APPROX.
VOLT DROP PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP PER AMPERE
PER METRE		 CURRENT
RATING

APPROX.
VOLT DROP PER AMPERE
PER METREE

CURRENT
RATING		 APPROX.
VOLT DROP PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP PER AMPERE
PER METRE
Sqmm AMPERE mV AMPERE mV AMPERE TERFOIL mV

FLAT mV

 AMPERE mV AMPERE mV AMPERE mV
16
25
35
50
70
95
120
150
185
240
300
380
480
600
740
960
1200
-
-
-
180
220
265
300
335
380
445
500
570
640
720
820
940
1040
-
-
-
1.5
1.1
0.77
0.62
0.51
0.42
0.34
0.29
0.26
0.23
0.21
0.2
0.18
0.17
-
-
-
185
225
270
310
345
395
460
520
590
670
750
850
980
1100
-
-
-
1.5
1.1
0.8
0.66
0.56
0.47
0.4
0.35
0.33
0.3
0.29
0.27
0.26
0.26
-
-
-
150
185
225
255
285
325
375
425
480
540
610
680
780
860
-
-
-
1.3
0.9
0.67
0.54
0.45
0.37
0.3
0.25
0.23
0.2
0.18
0.17
0.16
0:15
-
-
-
1.3
0.93
0.69
0.56
0.48
0.4
0.34
0.3
0.24
0.22
0.2
0.19
0.18
0.17
-
-
-
160
195
235
270
300
340
400
450
510
580
650
740
850
950
-
-
-
1.3
0.93
0.7
0.57
0.49
0.41
0.34
0.31
0.28
0.26
0.25
0.24
0.23
0.22
88
115
140
165
200
245
-
-
-
-
-
-
-
-
-
-
-
4.5
2.9
2.1
1.5
1.1
0.79
-
-
-
-
-
-
-
-
-
-
-
75
97
115
140
170
205
235
265
300
350
395
-
-
-
-
-
-
3.9
2.5
1.8
1.3
0.93
0.68
0.54
0.45
0.37
0.29
0.25
-
-
-
-
-
-

* ADJACENT CABLE SURFACES SEPARATED BY ONE CABLE DIAMETER.
CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC WIRE ARMOURED PVC SHEATHED CABLES (Cu/PVC/SWA/PVC)
NOMINAL
AREA OF
CONDUCTOR

SINGLE CORE

 TWO CORE

THREE AND FOUR CORE

TWO CABLES THREE CABLES
CURRENT
RATING		 APPROXI MATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXI MATE
VOLT DROP
PER AMPERE
PER METRE
 
DUCTS TOUCHING DUCTS TREFOIL TOUCING
  CURRENT
RATING		 APPROXI MATE
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROXI MATE
VOLT DROP
PER AMPERE
PER METRE		    

Sq mm

AMPERE

mV

AMPERE

mV

AMPERE

mV

AMPERE

mV

1.5**
2.5**
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
-
-
-
-
-
-
-
-
215
260
305
340
370
410
460
500
540
580
630
660
700
-
-
-
-
-
-
-
-
1
0.76
0.61
0.54
0.48
0.44
0.4
0.37
0.34
0.32
0.3
0.28
0.27
-
-
-
-
-
-
-
-
200
240
280
310
340
375
415
455
485
520
560
580
620
-
-
-
-
-
-
-
-
0.88
0.66
0.53
0.47
0.42
0.38
0.34
0.32
0.3
0.28
0.26
0.25
0.23
26
34
44
55
73
96
125
150
180
220
265
300
340
385
445
495
560
-
-
-
-
28
17
11
7.4
404
2.8
1.7
1.3
0.94
0.66
49
40
0.34
0.29
0.24
0.21
0.19
-
-
-
-
22
29
37
47
62
80
105
125
150
185
225
255
285
325
375
425
480
-
-
-
-
25
15
9.6
6.4
3.8
2.4
1.5
1.1
0.82
0.57
0.42
0.35
0.29
0.25
0.21
0.18
0.17
-
-
-
-

* ALUMINIUM WIRE ARMOURED
** CIRCULAR SOLID CONDUCTORS
CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (ALlPVC/SWNPVC)
NOMINAL
AREA OF
CONDUCTOR

SINGLE CORE

 TWO CORE

THREE AND FOUR CORE

TWO CABLES THREE CABLES
CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE 		CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE
DUCTS TOUCHING DUCTS TREFOIL TOUCING
CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE 		CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE

Sqmm

AMPERE

mV

AMPERE

mV

AMPERE

mV

AMPERE

mV

16
25
35
50
70
95
120
150
185
240
300
380
480
600
740
960
1200
-
-
-
165
200
240
270
295
330
375
415
445
490
530
560
610
660
-
-
-
1.6
1.1
0.87
0.73
0.64
0.56
0.48
0.43
0.39
0.36
0.34
0.32
0.3
0.28
-
-
-
155
185
220
245
270
305
345
375
405
440
475
500
550
580
-
-
-
1.4
0.99
0.75
0.63
0.55
0.48
0.41
0.37
0.34
0.31
0.29
0.28
0.26
0.24
73
94
115
135
165
195
-
-
-
-
-
-
-
-
-
-
-
4.5
2.9
2.1
1.5
1.1
0.79
-
-
-
-
-
-
-
-
-
-
-
61
80
96
115
140
170
195
220
250
290
330
-
-
-
-
-
-
3.9
2.5
1.8
1.3
0.93
0.68
0.54
0.45
0.37
0.29
0.25
-
-
-
-
-
-

* ALUMINIUM WIRE ARMOURED

BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:

Ground thernal resistivity............................... 1.2 oC m/W
Ground Temperature......................................... 1.5 oC m/W
Depth of laying............................... O.5 meter (to the centre of cable or trefoil group of ducts)

Maximum operating
conductor temperature
at rated current...................... 70°C

Cables shall only be continuously operated at their full rating if the minimum current at which circuit protection is designed to operate does not exceed 1.5 times the values tabulated.

 METHOD OF INSTALLATION:

The term "duct" applies to a single earthenware, fibre or ferrous pipe except that in the case of single core cables for use in ac systems, ferrous ducts should not be employed. Ratings are given for ducts containing one cable each. Cables installed in the manner indicated in the tables.

EFFECT OF GROUPING OF CABLES:

The current ratings given apply to one, twin or multi core cable, or a single set of single core cables forming a circuit. When two or more circuits are laid in closed proximity the ratings of the cables must be reduced by the group rating factors in ERA report.
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES
GROUND TEMPERATURE °C 20 25 30 35
RATING FACTOR 0.95 0.95 0.85 0.79

For the other conditions of installation, reference should be made to ERA
CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
NOMINAL
AREA OF
CONDUCTOR 		SINGLE CORE TWO CORE THREE AND FOUR CORE
TWO CABLES THREE CABLES
CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE 
DUCTS TOUCHING DUCTS TREFOIL TOUCING
  CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE
TERFOIL       FLAT		    
Sqmm AMPERE mV AMPERE mV mv AMPERE mV AMPERE mV
16
25
35
50
70
95
120
150
185
240
300
400
500
630
800
1000
-
-
-
220
270
325
370
415
470
550
620
710
800
920
1030
1140
-
-
-
1.0
0.76
0.61
0.54
0.48
0.44
0.40
0.37
0.34
0.32
0.30
0.28
0.27
-
-
-
205
250
300
340
380
430
500
560
640
720
820
920
1010
-
-
-
0.88
0.66
0.53
0.47
0.42
0.38
0.34
0.32
0.30
0.28
0.26
0.25
0.23
-
-
-
0.89
0.68
0.55
0.48
0.44
0.40
0.37
0.34
0.32
0.30
0.29
0.27
0.26
96
125
150
180
220
265
300
340
385
445
510
580
-
-
-
-
2.8
1.7
1.3
0.94
0.66
0.49
0.40
0.34
0.29
0.24
0.21
0.19
-
-
-
-
80
105
125
150
185
225
255
285
325
375
425
485
-
-
-
-
2.4
1.5
1.1
0.82
0.57
0.42
0.35
0.29
0.25
0.21
0.18
0.17
-
-
-
-

CURRENT RATINGS FOR CABLES RUN IN SINGLE WAY DUCTS
600/1000V - SINGLE, TWIN, THREE AND FOUR CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (ALlPVC/PVC)
NOMINAL
AREA OF
CONDUCTOR 		SINGLE CORE TWO CORE THREE AND FOUR CORE
TWO CABLES THREE CABLES
CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE 		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE  
DUCTS TOUCHING DUCTS TREFOIL TOUCING
  CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE 		 CURRENT
RATING		 APPROX.
VOLT DROP
PER AMPERE
PER METRE 
TERFOIL          FLAT   		   
Sq mm AMPERE mV AMPERE mV mV AMPERE mV AMPERE mV
16
25
35
50
70
95
120
150
185
240
300
380
480
600
740
960
1200
-
-
-
165
205
245
280
315
355
415
470
530
600
680
770
880
990
-
-
-
1.6
1.1
0.87
0.73
0.64
0.56
0.48
0.43
0.39
0.36
0.34
0.32
0.3
0.28
-
-
-
155
190
225
260
290
325
380
430
480
550
610
690
790
880
-
-
-
1.4
0.99
0.75
0.63
0.55
0.48
0.41
0.37
0.34
0.31
0.29
0.28
0.26
0.24
-
-
-
1.4
0.99
0.77
0.65
0.57
0.5
0.43
0.39
0.36
0.34
0.32
0.3
0.28
0.27
73
94
115
135
165
200
-
-
-
-
-
-
-
-
-
-
-
4.5
2.9
2.1
1.5
1.1
0.79
-
-
-
-
-
-
-
-
-
-
-
61
80
96
115
140
170
195
220
250
290
330
-
-
-
-
-
-
3.9
2.5
1.8
1.3
0.93
0.68
0.54
0.45
0.37
0.29
0.25
-
-
-
-
-
-

BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:

Ground thernal resistivity............................... 1.2 oC m/W
Ground Temperature......................................... 1.5 oC m/W
Depth of laying............................... O.5 meter (to the centre of cable or trefoil group of ducts)

Maximum operating
conductor temperature
at rated current...................... 70°C

Cables shall only be continuously operated at their full rating if the minimum current at which circuit protection is designed to operate does not exceed 1.5 times the values tabulated.

 METHOD OF INSTALLATION:

The term "duct" applies to a single earthenware, fibre or ferrous pipe except that in the case of single core cables for use in ac systems, ferrous ducts should not be employed. Ratings are given for ducts containing one cable each. Cables installed in the manner indicated in the tables.

EFFECT OF GROUPING OF CABLES:

The current ratings given apply to one, twin or multi core cable, or a single set of single core cables forming a circuit. When two or more circuits are laid in closed proximity the ratings of the cables must be reduced by the group rating factors in ERA report.
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES

GROUND TEMPERATURE °C 20 25 30 35
RATING FACTOR 0.95 0.95 0.85 0.79

For the other conditions of installation, reference should be made to ERA
 
 
 
 
 
 
ALUMINIUM WIRE ARMOURED.

CURRENT RATINGS FOR CABLES LAID DIRECT IN GROUND/IN SINGLE WAY/DUCTSIIN AIR
1900/3300V - *SINGLE & THREE CORE
STRANDED ALUMINIUM CONDUCTORS PVC INSULATED
SINGLE WIRE ARMOURED PVC SHEATHED CABLES (AL/PVC/Armoured/PVC)
NOMINAL
AREA
OF
CONDUCTOR		 DIRECT IN GROUND IN SINGLE WAY DUCTS IN AIR
SINGLE CORE*   SINGLE CORE*   SINGLE CORE*  
THREE
CABLES
TREFOIL
TOUCHING		 THREE
CORE		 THREE
CABLES
TREFOIL
TOUCHING
IN TREFOIL		 THREE
CORE		 THREE
CABLES
TREFOIL
TOUCHING
IN TREFOIL		 THREE
CORE
Sqmm AMPERE AMPERE AMPERE AMPERE AMPERE AMPERE
16
25
35
50
70
95
120
150
185
240
300
380
480
600
740
960
1200
-
-
-
145
180
215
245
270
305
355
400
440
490
540
580
640
690
72
93
110
135
165
195
225
255
290
335
380
-
-
-
-
-
-
-
-
-
145
175
210
235
255
290
325
360
385
420
450
470
510
550
61
78
94
110
140
165
190
215
245
285
320
-
-
-
-
-
-
-
-
-
140
170
215
245
280
320
375
430
495
560
630
710
790
870
60
78
93
115
145
175
205
235
270
320
365
-
-
-
-
-
-

* ALUMINIUM WIRE ARMOURED

BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:

AMBIENT AIR TEMPERATURE............................... 30 °C
GROUND THERMAL RESISTIVITY....................... 1.2 °C m/W
GROUND TEMPERATURE....................... 15 °c
DEPTH OF LAYING....................... O.8 metre ( to the centre of cable or duct, or trefoil group of cables or ducts)

MAXIMUM OPERATING
CONDUCTOR TEMPERATURE
AT RATED CURRENT....................... 70°C
Cables shall only be operated at their full rating if the minimum current at which circuit protection is designed to operate does not exceed 1.5 times (in the case of cables in air or in ducts) or 1.3 times (in the case of cables laid direct in the ground) the values tabulated.

Cables shall only be continuously operated at their full rating if the minimum current at which circuit protection is designed to operate does not exceed 1.5 times the values tabulated.

 METHOD OF INSTALLATION:

The term "duct" applies to a single earthenware, fibre or ferrous pipe except that in the case of single core cables for use in ac systems, ferrous ducts should not be employed. Ratings are given for ducts containing one cable each. Cables installed in the manner indicated in the tables.

EFFECT OF GROUPING OF CABLES:

The current ratings given apply to one, twin or multi core cable, or a single set of single core cables forming a circuit. When two or more circuits are laid in closed proximity the ratings of the cables must be reduced by the group rating factors in ERA report.

 (A) The horizontal balance between circuits is

(I) Not less than 6 times the overall diameter of an individual cable.
(II) Not that than the overall width of an individual circuit, except that the horizontal clearance need not in any case exceed 150mm.

(B) The vertical clearance between circuits is not less than 150mm.

(C) if the number of circuits exceeds 4, they are installed in a horizontal plane.

Cables laid direct: The ratings of the cables should be reduced by the group rating factors given in ERA Report
Cable in ducts: The ratings of the cables should be reduced by the group rating factors given in ERA Report
RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES

AMBIENT AIR TEMPERATURE°C 25 35 40 45 45
RATING FACTOR 1.08 0.94 0.86 0.77 0.77

RATING FACTORS FOR OTHER GROUND TEMPERATURES

GROUND TEMPERATURE °C 20 25 30 35
RATING FACTOR 0.95 0.95 0.85 0.79

For the other conditions of installation, reference should be made to ERA
1900/3300v - SINGLE CORE
STRANDED COPPER CONDUCTORS PVC INSULATED
PVC SHEATHED CABLES (Cu/PVC/PVC)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
BASIC ASSUMPTIONS AND CONDITIONS OF INSTALLATION:


AMBIENT AIR TEMPERATURE................................................ 30 °C
GROUND THERMAL RESISTIVITY.......................................... 1.2 °C m/W
GROUND TEMPERATURE....................................................... 15 °c
DEPTH OF LAYING................................................................. O.8 metre ( to the centre of cable or duct, or trefoil group of cables or ducts)

MAXIMUM OPERATING
CONDUCTOR TEMPERATURE
AT RATED CURRENT.............................................................. 70°C

Cables shall only be operated at their full rating if the minimum current at which circuit protection is designed to operate does not exceed 1.5 times (in the case of cables in air or in ducts) or 1.3 times (in the case of cables laid direct in the ground) the values tabulated.

METHOD OF INSTALLATION:
Cable installed in the manner indicated in the tables when groups of circuits are installed in close proximity. Consideration should be given to the following.

Cable in air: No reduction in rating is necessary providing that

(A) The horizontal balance between circuits is

(I) Not less than 6 times the overall diameter of an individual cable.
(II) Not that than the overall width of an individual circuit, except that the horizontal clearance need not in any case exceed 150mm.

(B) The vertical clearance between circuits is not less than 150mm.

(C) if the number of circuits exceeds 4, they are installed in a horizontal plane.

Cables laid direct: The ratings of the cables should be reduced by the group rating factors given in ERA Report
Cable in ducts: The ratings of the cables should be reduced by the group rating factors given in ERA Report


RATING FACTORS FOR OTHER AMBIENT AIR TEMPERATURES
AMBIENT AIR TEMPERATURE°C 25 35 40 45 45
RATING FACTOR 1.08 0.94 0.86 0.77 0.77

RATING FACTORS FOR OTHER GROUND TEMPERATURES
GROUND TEMPERATURE °C 20 25 30 35
RATING FACTOR 0.95 0.95 0.85 0.79

For the other conditions of installation, reference should be made to ERA
RATING FACTORS FOR CABLES INSTALLED IN AIR

Mostly "in air" installations are in buildings, hence the ratings correspond to ambient air temperature of 30°C Conversion to any other ambient temperature is achieved by the use of taking factors given with the current rating tables.

Ratings for cables run in free air are on basis that they are shielded from the direct rays of the sun without restriction of ventilation.



DEFINED CONDITIONS OF INSTAllATION:

Defined conditions of installation are given below. These are extracted from lEE Regulations for the Electrical Equipment of Buildings.

(a) Single Core Cable:
(1) Two or three single core cable are installed one above the other, fixed to the vertical surface of a wall or open cable trench as follows, the distance between the wall and the surface of the cable being at least 20mm in each instance. Cables in which the conductor cross sectional area does not exceed 185 mm2 are installed at a distance between centre of twice the overall diameter of the cable.
Cables in which the conductor cross-selectional area exceeds 185 mm2 are installed at a distance between centres of 90 mm. The ratings for two cables may be applied with safety in instances where,such ca91es are installed in horizontal formation on brackets fixed to a wall, either spaced as indicated above, or touching through out
(2) Three single core cables are installed in trefoil formation, fixed to the vertical surface of a wall or open cable trench, the cables touching through out and the distance between the wall and the surface of the nearest cable being atleast 20mm, or, alternatively, three single core cables are installed in trefoil formation and laid on a non-metallic floor the cables touching each other and the floor throughout. The cables are assumed to be remote from iron,steel or ferro-concrete , other than the cable supports.
.(b) Multicore Cables:
  Cables of all types other than single core cables are installed singly, fixed to the vertical surface of a wall or open cable trench, the distance between the surface of the cable and the wall being at least 20mm in every instance.

The ratings given in Tables 16, 17, 18, 19, 28, 29, 30 & 31 for multicore cables are for cables installed under defined conditions

.

If it is necessary for cables to be installed at distances less than those described above, then the values tabulated under the heading "Clipped direct to a surface" in the lEE Wiring Regulations should be employed.
RATING FACTORS FOR CABLES LAID DIRECT IN GROUND:

Ratings for cables installed direct in the ground are based on values of soil temperature and soii thermal resistivity, which are generally representative of conditions in Pakistan. Rating factors to take account of variation in ground temperature are given with the current rating tables. Where conditions of operation can be fairly accurately estimated, and knowledge of soil along the route is available, it is possible to determine the ratings more precisely by the use ofthe soil thermal resistivity factors, group factors, and factors for the depths of laying given in Table 31, 32, 33 and 34, These factors are tabulated in more detail in ERA Report


RATING FACTOR FOR VARIATION IN THERMAL
RESISTIVITY OF SOIL (AVERAGE VALUES)
CABLE SIZE
Sqmm
SINGLE CORE CABLE UPTO 150
FROM 185 TO 300
FROM 380 TO 1200
MULTICORE CABLES UPTO 16
FROM 25 TO 150
FROM 185 TO 400
 
0.8
1.16
1.17
1.17
1.1
1.14
1.15
SOIL THERMAL RESISTIVITY IN°C m/W
0.9
1.12
1.12
1.12
1.07
1.09
1.10
1.0
1.07
1.07
1.07
1.05
1.06
1.07
1.5
0.91
0.91
0.91
0.93
0.92
0.92
2.0
0.81
0.8
0.8
0.85
0.83
0.81
2.5
0.73
0.73
0.72
0.79
0.76
0.74

Types of load are classified under three headings in ERA Report

TYPE A Cables carrying a constant load throughout the year.
TYPE B Cables carrying varying loads, maximum in summer.
TYPE C Cables carrying varying loads, maximum in winter.

With the type of load on the cable, it is possible to determine the soil thermal resistivity along the cable route in accrodince with recommendations in ERA Report
RATING FACTORS FOR DEPTH OF LAYING (TO CENTRE OF CABLE OR TREFOIL GROUP OF CABLES
DEPTH OF
LAYING		 600/1000V CABLES 1900/3300V CABLES
METRES UPTO
50 Sq mm		 70 Sq mm TO
300 Sq mm		 ABOVE
300 Sq mm		 UPTO
300 Sq mm		 ABOVE
300 Sq mm
0.50
0.60
0.80
1.00
1.25
1.50
1.75
2.00
2.50
3.00
1.00
0.99
0.97
0.95
0.94
0.93
0.92
0.91
0.90
0.89
1.00
0.98
0.96
0.93
0.92
0.90
0.89
0.88
0.87
0.85
1.00
0.97
0.94
0.92
0.89
0.87
0.86
0.85
0.84
0.82
-
-
1.0
0.98
0.96
0.95
0.94
0.92
0.91
0.9
-
-
1.00
0.97
0.95
0.93
0.91
0.89
0.88
0.86

GROUP RATING FACTORS FOR CIRCUIT OF THREE SINGLE CORE CABLES, IN TREFOIL OR LAID IN FLAT TOUCHING, HORIZONTAL FORMATION
  NUMBER
OF
CIRCUITS		 SPACING OF CIRCUITS - METRE    
 
TOUCHING   0.15 0.3 0.45 0.6
  TREFOIL LAID FLAT        
600/1000V
 
 
 
1900/3300V
 
2
3
4
5
6
2
3
4
5
6
0.78
0.66
0.61
0.56
0.53
0.78
0.66
0.59
0.55
0.52
0.81
0.70
0.64
0.60
0.57
0.80
0.68
0.62
0.58
0.55
0.83
0.73
0.68
0.64
0.61
0.82
0.71
0.65
0.61
0.58
0.88
0.79
0.73
0.73
0.71
0.86
0.77
0.72
0.68
0.66
0.91
0.84
0.81
0.79
0.78
0.89
0.8
0.77
0.74
0.72
0.93
0.87
0.85
0.85
0.82
0.91
0.83
0.8
0.78
0.76

* This configuration, at 0.15 metre spacing, may not be practical for larger diameter cables.
GROUP RATING FACTORS FOR MUL TICORE CABLES IN HORIZONTAL FORMATION
  NUMBER
OF
CIRCUITS		 SPACING IN METRE    
TOUCHING 0.15 0.3 0.45 0.6
  TREFOIL LAID FLAT      
600/1000V
 
 
 
1900/3300V
 
2
3
4
5
6
2
3
4
5
6
0.81
0.70
0.63
0.59
0.55
0.80
0.68
0.62
0.57
0.54
0.87
0.78
0.74
0.70
0.68
0.85
0.76
0.71
0.66
0.64
0.91
0.84
0.81
0.78
0.77
0.89
0.81
0.77
0.73
0.71
0.93
0.88
0.86
0.84
0.83
0.91
0.84
0.81
0.78
0.77
0.95
0.90
0.89
0.87
0.87
0.93
0.87
0.84
0.82
0.81

The term ducts applies to single way earthenware, fibre or ferrous pipes. Recommended inside and outside diameter of duct is 100mm and 130mm respectively for cables having overall diameter of upto 65mm. Similarly for cables having overall diameter above 65mm and upto 90mm the inside and outside duct diameter is 125mm and 160mm respectively.

Ratings for cables installed in single way ducts, underground, are based on values of soil temperature and soil thermal resistivity which are generally representative of conditions in Pakistan. Rating factors to take account of variation in ground temperature are given with the current rating tables where conditions of operation can be fairly accurately estimated, and knowledge of the sOil along the route is available. it is possible to determine the ratings more precisely by the use of the soil thermal resistivity factors, grouping factors and factors for the depth of laying given in tables 36 to
39. These factors are tabulated in more detail in ERA Report
AVERAGE VALUES OF RATING FACTORS FOR VARIATION IN THERMAL RESISTIVITY OF SOIL
CABLE SIZE   SOIL THERMAL RESISTIVITY IN C m/W
Sqmm
SINGLE CORE CABLES UPTO 150
FROM 185 TO 300
FROM 500 TO 1200
MULTICORE CABLES UPTO 16
FROM 85 TO 150
FROM 185 TO 400
0.8
1.09
1.11
1.12
1.04
1.05
1.07
0.9
1.06
1.07
1.08
1.03
1.04
1.05
1.0
1.04
1.04
1.05
1.02
1.02
1.03
1.5
0.94
0.94
0.93
0.97
0.96
0.95
2.0
0.87
0.86
0.84
0.93
0.91
0.89
2.5
0.81
0.79
0.78
0.9
0.86
0.83

Types of load are classified under three headings in ERA report

TYPE A Cables carrying a constant load throughout the year.
TYPE B Cables carrying varying loads, maximum in summer.
TYPE C Cables carrying varying loads, maximum in winter.

With the type of load on the cable, it is possible to determine the soil thermal resistivity along the cable route in accrodince with recommendations in ERA Report
RATING FACTORS FOR DEPTH OF LAYING TO THE CENTRE OF DUCT OR TREFOIL GROUP OF DUCTS
DEPTH OF LAYING 600/1000V CABLES 1900/3300V CABLES
METRE SINGLE CORE MULTI CORE SINGLE CORE MULTI CORE
0.5.0
0.6.0
0.8.0
1.00
1.25
1.50
1.75
2.0
2.5
3.0
1.00
0.98
0.95
0.93
0.91
0.89
0.88
0.87
0.86
0.85
1.00
0.99
0.98
0.96
0.95
0.94
0.94
0.93
0.92
0.91
-
-
1.00
0.98
0.95
0.94
0.92
0.91
0.89
0.88
-
-
1.00
0.99
0.97
0.96
0.96
0.95
0.94
0.93

OR MORE
GROUP RATING FACTORS FOR SINGLE CORE CABLES IN TREFOIL SINGLE WAY DUCTS,HORIZONTAL FORMATION
NUMBER OF
DUCTS IN
GROUP		 SPACING IN METRES
TOUCHING 0.45 0.60
600/1000V
 
 
 
1900/3300V
 
2
3
4
5
6
2
3
4
5
6
0.87
0.78
0.74
0.70
0.69
0.85
0.75
0.70
0.67
0.64
0.91
0.84
0.81
0.79
0.78
0.88
0.80
0.77
0.74
0.72
0.93
0.87
0.85
0.83
0.82
0.90
0.83
0.80
0.78
0.76

GROUP RATING FACTORS FOR SINGLE CORE CABLES IN TREFOIL SINGLE WAY DUCTS, HORIZONTAL FORMATION
NUMBER OF
DUCTS IN
GROUP		 SPACING IN METRES
TOUCHING 0.3 0.45 0.6
600/1000V
 
 
 
1900/3300V
2
3
4
5
6
2
3
4
5
6
0.9
0.83
0.79
0.75
0.73
0.88
0.8
0.76
0.72
0.69
0.93
0.88
0.85
0.83
0.82
0.91
0.85
0.81
0.78
0.76
0.95
0.91
0.89
0.88
0.87
0.93
0.88
0.85
0.83
0.81
0.96
0.93
0.92
0.91
0.9
0.94
0.9
0.88
0.86
0.85

RESISTANCE OF CONDUCTOR AND ARMOUR
SINGLE CORE CABLES WITH ALUMINIUM WIRE ARMOUR
NOMINAL
ARE
OF
CONDUCTORS		 MAXIMUM RESISTANCE PER 1000 METRES OF CABLES AT 20° C (OHM)
ALUMINIUM
CONDUCTOR		 COPPER
CONDUCTOR		 ALUMINIUM WIRE ARMOUR
CABLES WITH
STRANDED
ALUMINIUM
CONDUCTORS		 CABLES WITH
STRANDED
COPPER
CONDUCTORS
Sqmm
50
70
95
120
150
185
240
300
400
500
630
800
1000
 
0.628
0.435
0.313
0.248
0.202
0.161
0.122
0.098
0.076
0.061
0.47
0.037
0.029
 
0.379
0.262
0.189
0.150
0.122
0.097
0.074
0.059
0.046
0.037
0.028
0.022
0.018
600/1000V 1900/3300V 600/1000V 1900/3300V
0.91 0.8 0.82 0.74
0.8 0.72 0.74 0.66
0.72 0.49 0.64 0.45
0.49 0.47 0.45 0.41
0.45 0.43 0.41 0.39
0.41 0.41 0.37 0.37
0.37 0.37 0.33 0.33
0.35 0.35 0.31 0.31
- - 0.23 0.23
- - 0.19 0.19
- - 0.17 0.17
- - 0.13 0.13
- - 0.11 0.11

MUL TICORE CABLES WITH STEEL WIRE ARMOUR
NOMINAL
AREA
OF
CONDUCTOR		   MAXIMUM RESISTANCE PER 1000 METRES OF CABLE AT 20°C (OHM)
COPPER
CONDUCTOR		 ALUMIMINIUM
CONDUCTOR		 STEEL WIRE ARMOURED
CABLES WITH STRANDED
ALUMINIUM CONDUCTORS		 CABLES WITH STRANDED COPPER CONDUCTORS
    TWO
CORE		 THREE
CORE		 FOUR
CORE		 TWO
CORE		 THREE CORE FOUR
CORE		 FOUR
CORE WITH
REDUCED
NEUTRAL
Sq mm
1.5*
2.5*
4
6
10
16
25
35
50
70
95
120
150
185
240
300
300
400
12.1
7.41
4.61
3.08
1.83
1.15
0.727
0.524
0.387
0.268
0.193
0.153
0.124
0.991
0.075
0.060
0.060
0.047
-
-
-
-
-
1.89
1.20
0.868
0.641
0.443
0.32
0.253
0.206
0.164
0.125
0.100
0.100
-
600/
1000v
-
-
-
-
-
4.6
3.0
2.7
2.6
2.1
1.5
-
-
-
-
-
-
-
600/
1000v
-
-
-
-
-
3.9
2.5
2.3
2
1.5
1.3
1.2
0.82
0.74
0.65
0.59
-
-
1900/
3300v
-
-
-
-
-
2.2
2.0
1.9
1.4
1.3
1.2
0.89
0.78
0.72
0.65
0.59
-
-
600/
1000v.
-
-
-
-
-
2.7
2.3
2
1.4
1.3
1.1
0.78
0.71
0.64
0.57
0.52
-
600/
1000v
10.7
9.1
7.5
6.8
3.9
4.5
2.6
2.4
2.1
1.9
1.3
1.2
1.1
0.78
0.69
0.63
-
0.56
600/
1000v
10.2
8.8
7.0
4.6
3.7
3.8
2.4
2.1
1.9
1.3
1.2
1.1
0.74
0.68
0.60
0.54
-
0.49
1900/
3300v
-
-
-
-
-
2.1
1.9
1.8
1.3
1.2
1.1
0.76
0.71
0.66
0.60
0.54
-
0.49
600/
1000v
9.5
7.9
4.6
4.1
3.4
2.6
2.1
1.9
1.3
1.2
0.98
0.71
0.65
0.59
0.52
0.47
-
0.34
600/1000v
-
-
-
-
-
-
2.1
1.9
1.3
1.2
1.0
0.72
0.66
0.6
0.54
0.48
(150 Sq mm)
0.47
(185 Sq mm)
0.35

300/500 or 450/750 V - SINGLE CORE

COPPER CONDUCTOR PVC INSULATED
UNSHEATHED OR PVC SHEATHED CABLES

(Cu/PVC or Cu/PVC/PVC) B.S. 6004
Nominal
Area of
Conductor		 Maximum
Conductor
Resistance
at 20 C		 Thickness
of
Insulation		 Cu/PVC Cu/PVC/PVC
Approx.
Overall
Diameter		 Approx
Cable
Weight		 Thickness
of Sheath		 Approx
.Overall
Diameter		 Approx.
Cable
Weight
Sqmm Ohm/Km mm mm Kg/Km mm mm Kg/Km
1.0*
1.5*
1.5
2.5*
2.5
4
6
10
16
25
35
50
70
95
120
150
185
240
300
400
500
630
18.1
12.1
12.1
7.41
7.41
4.61
3.08
1.83
1.15
0.727
0.524
0.387
0.268
0.193
0.153
0.124
0.0991
0.0754
0.0601
0.047
0.0366
0.0283
0.6
0.7
0.7
0.8
0.8
0.8
0.8
1
1
1.2
1.2
1.4
1.4
1.6
1.6
1.8
2
2.2
2.4
2.6
2.8
2.8
2.8
3.3
3.5
3.9
4.2
4.8
5.4
6.8
8
9.8
11
13
15
17
19
21
23.5
26.5
29.5
33.5
37
41
14
20
22
28
32
45
70
105
175
275
370
490
690
960
1170
1460
1850
2400
3000
3910
4920
6100
0.8
0.8
0.8
0.8
0.8
0.9
0.9
0.9
1
1.1
1.1
-
-
-
-
-
-
-
-
-
-
-
4.5
4.9
5.2
5.8
6
6.8
7.4
8.8
10.5
12.5
13.5
-
-
-
-
-
-
-
-
-
-
-
28
35
38
50
53
72
95
150
215
330
430
-
-
-
-
-
-
-
-
-
-
-

* Solid wire
1 600/1000V PVC Insulated Flat Cable (Three core)2 Constraction

3 Core identification (red and blue)
Conductor Nominal
thickness
of
insulation


mm		 Nominal
thickness
of
sheath


mm		 Overall
dimension



(approx.)
mm x mm		 Weight




(approx.) kg/Km		 Max
conductor
resistance
(at 20°C)

Ω/km		 Test
voltage
for 5 min


kV		 Min
insulation
resistance
(at 20"C)

M Ω/km
Nominal
cross-sectional
area

mm2		 Construction



No.lmm
1.0
1.5
2.5
4.0
6.0
10
16
1/1.13
1/1.38
1/1.78
7/0.85
7/1.04
7/1.35
7/1.70
0.6
0.6
0.7
0.8
0.8
1.0
1.0
0.9
0.9
1
1
1.1
1.2
1.3
4.4 x 6.9
4.6 x 7.2
5.4 x 8.7
6.4 x 10.6
7.1x11.9
8.7 x 14.8
9.9x17.1
51
63
95
145
200
315
455
17.7
11.9
7.14
4.52
3.02
1.79
1.13
1.5
1.5
1.5
1.5
1.5
3
3
12
11
9
8
7
7
6

1 600/1000V PVC Insulated Flat Cable (Three core)2 Constraction

3 Core identification (red yellow and blue)
Conductor Nominal
thickness
of
insulation


mm		 Nominal
thickness
of
sheath


mm		 Overall
dimension



(approx.)
mm x mm		 Weight




(approx.) kg/Km		 Max
conductor
resistance
(at 20°C)

Ω/km		 Test
voltage
for 5 min


kV		 Min
insulation
resistance
(at 20"C)

M Ω/km
Nominal
cross-sectional
area

mm2		 Construction



No.lmm
1.0
1.5
2.5
4.0
6.0
10
16
1/1.13
1/1.38
1/1.78
7/0.85
7/1.04
7/1.35
7/1.70
0.6
0.6
0.7
0.8
0.8
1.0
1.0
0.9
0.9
1
1
1.1
1.2
1.3
4.3 x 9.1
4.5 x 9.8
5.4 x11.9
6.5x15.0
7.1x16.7
8.7 x21.0
9.9x24.3
73
91
140
220
230
470
675
17.7
11.9
7.14
4.52
3.02
1.79
1.13
1.5
1.5
1.5
1.5
1.5
3
3
12
11
9
8
7
7
6

On order, we also manufacture, the flat sizes in flexible conductors.
B.S. 6004
B.S. 6500
300/500 V. TWIN FLAT CABLES
COPPER CONDUCTOR PVC INSULATED
PVC SHEATHED CABLES WITH CIRCUIT PROTECTIVE CONDUCTOR
(Cu/PVC/PVC)
WITH CIRCUIT PROTECTIVE CONDUCTOR (PREVIOUSLY ECC)
Nominal Area of   Max Resistance at 20 oC Thickness
of
outer sheath		 Thickness
Dimension
of cable (Max.)
Conductor Circuit
Protective
Conductor		 Conductor Circuit
Protective
Conductor		 Thickness
of
Insulation
Sqmm Ohm/Km mm mm mm
1.0*
1.5*
1.5
2.5*
2.5
4
6
1.0
1.0
1.0
1.5
1.5
1.5
2.5
18.1
12.1
12.1
7.41
7.41
4.61
3.08
18.1
18.1
18.1
18.1
18.1
12.1
7.41
0.6
0.7
0.7
0.8
0.8
0.8
0.8
0.9
0.9
0.9
1.0
1.0
1.0
1.1
4.7 x 8.6
5.4 x 9.6
5.5 x 10.0
6.2 x 11.5
6.3 x 12.1
7.2x13.0
8.0 x 15.0

WITHOUT CIRCU IT PROTECTIVE CONDUCTOR
Nominal Area
of
Conductor		 Max. Conductor
Resistance at
20°C		 Thickness
of
Insulation		 Thickness
of
Outer Sheath		 Overall
Dimension
of Cable (Max)
Sqmm Ohm/Km mm mm mm
1.0*
1.5*
1.5
2.5*
2.5
4
6
18.1
12.1
12.1
7.41
7.41
4.61
3.08
0.6
0.7
0.7
0.8
0.8
0.8
0.8
0.9
0.9
0.9
1.0
1.0
1.0
1.1
4.7 x 7.4
5.4 x 8.4
5.5 x 8.8
6.2 x 9.8
6.3 x 10.5
7.2x11.5
8.0 x 13.0

B.S. 6004
 
 
 
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