BS 6622 Three Core Armoured 33KV XLPE Stranded Copper Conductors

Construction

cross-sectional area mmsq
Minimum average thickness of insulation mm

Nominal diameter over insulation
mm

 
Nominal thickness of PVC bedding
mm
Nominal number and diameter of armoured wires no./mm
Nominal thickness of PVC oversheath
mm
Nominal overall diameter of cable mm
50
8
27.1
1.8
60/3.15
3.4
78.5
70
8
28.9
1.8
64/3.15
3.5
82.6
95
8
30.6
1.9
67/3.15
3.6
86.7
120
8
32.1
2.0
70/3.15
3.7
90.3
150
8
33.4
2.0
72/3.15
3.8
93.3
185
8
35.2
2.1
76/3.15
3.9
97.6
240
8
37.4
2.2
80/3.15
4.1
102.9
300
8
39.7
2.3
85/3.15
4.3
108.5
400
8
42.4
2.4
90/3.15
4.5
114.9

Installation

cross-sectional area mmsq
Approximate cable weight kg/m
Nominal drum length
m
Minimum bending radius mm
Nominal internal diameter of ducts mm
50
9.7
350
1450
125
70
10.7
350
1500
125
95
12
300
1600
125
120
13.3
250
1650
150
150
14.4
250
1700
150
185
16.1
250
1800
150
240
18.4
250
1900
150
300
21
250
2000
150
400
24.2
250
2100
150

Electrical Performance

cross-sectional area mmsq
Maximum DC resistance of conductor at 20 ℃ uohms/m
Maximum AC resistance of conductor at 90 ℃ uohms/m
Reactance at 50Hz
uohms/m
Impedance at 50Hz uohms/m
Maximum Capacitace PF/m
Maximum charging current at normal voltage and frequency mA/m
50
387
494
143
513
142
0.85
70
268
343
134
367
159
0.95
95
193
248
127
278
175
1.05
120
153
196
122
231
189
1.13
150
124
159
118
197
201
1.21
185
99.1
128
114
171
217
1.30
240
75.4
98
109
146
237
1.42
300
60.1
80
105
131
258
1.55
400
47.0
64
102
120
282
1.69

Ratings

Cross-sectional area
mmsq
Current Ratings
Short circuit ratings
Laid in ground
Amps
Drawn into ducts
Amps
Laid in air
Amps
One second short circuit rating of conductor
KA
One second short circuit rating of copper per core
KA
50
210
185
225
6.8
Typically
less
then
1kA
70
255
225
275
9.8
95
295
260
330
13.3
120
335
300
380
17.2
150
375
335
430
21.2
185
420
380
490
26.6
240
480
430
570
34.9
300
530
480
650
43.8
400
580
530
720
57.3

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