BS 6622 Three Core Armoured 22KV 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
5.5
21.6
1.5
61/2.5
2.9
63.8
70
5.5
23.4
1.6
66/2.5
3.0
68.1
95
5.5
25.1
1.7
70/2.5
3.2
72.3
120
5.5
26.6
1.7
59/3.15
3.3
77.1
150
5.5
27.9
1.8
62/3.15
3.4
80.3
185
5.5
29.7
1.9
65/3.15
3.6
84.7
240
5.5
31.9
2.0
70/3.15
3.7
89.9
300
5.5
34.2
2.0
74/3.15
3.9
95.2
400
5.5
36.9
2.2
79/3.15
4.1
101.9

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
6.8
500
1000
100
70
7.8
500
1050
125
95
9.1
350
1100
125
120
11.0
350
1200
125
150
12.1
350
1250
125
185
13.8
300
1300
125
240
16.1
250
1350
125
300
18.4
250
1450
150
400
21.7
250
1550
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
129.0
510
183
0.73
70
268
348
121.0
363
207
0.83
95
193
248
114.0
272
229
0.92
120
153
196
110.0
225
249
1.00
150
124
159
107.0
191
266
1.06
185
99.1
128
103.0
164
289
1.16
240
75.4
98
99.5
139
318
1.27
300
60.1
80
94.4
123
348
1.39
400
47.0
64
91.2
111
383
1.53

Ratings

Cross-sectional area
mmsq
Current Ratings
Short circuit ratings
Laid direct 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