BS 6622 Single Core Unarmoured (Copper Wire Screened) 6.6kV XLPE Stranded Aiuminium Conductors
Construction
cross-sectional area mmsq |
Minimum average thickness of insulation mm |
Nominal diameter over insulation
|
Nominal area of copperwire screen mmsq |
Nominal average thickness of PVC oversheath |
Nominal overall diameter of cable mm |
70 |
2.5 |
16.8 |
16.0 |
1.7 |
23.5 |
95 |
2.5 |
18.5 |
16.0 |
1.7 |
25.4 |
120 |
2.5 |
20.0 |
16.0 |
1.8 |
26.9 |
150 |
2.5 |
21.3 |
16.0 |
1.8 |
28.5 |
185 |
2.5 |
23.1 |
16.0 |
1.9 |
30.3 |
240 |
2.6 |
25.5 |
25.0 |
1.9 |
32.9 |
300 |
2.8 |
28.3 |
25.0 |
2.0 |
35.9 |
400 |
3.0 |
31.4 |
35.0 |
2.2 |
39.2 |
500 |
3.2 |
34.7 |
35.0 |
2.6 |
42.8 |
630 |
3.2 |
38.6 |
35.0 |
3.1 |
47.0 |
Installation
cross-sectional area mmsq |
Approximate cable weight kg/m |
Nominal drum length |
Minimum bending radius mm |
Nominal internal diameter of ducts mm |
70 |
0.7 |
1000 |
400 |
100 |
95 |
0.8 |
1000 |
400 |
100 |
120 |
1.0 |
1000 |
450 |
100 |
150 |
1.1 |
500 |
450 |
100 |
185 |
1.3 |
500 |
500 |
100 |
240 |
1.5 |
500 |
500 |
100 |
300 |
1.7 |
500 |
550 |
100 |
400 |
2.2 |
500 |
600 |
100 |
500 |
2.6 |
500 |
650 |
100 |
630 |
3.1 |
300 |
750 |
100 |
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 |
Impedance at 50Hz uohms/m |
Maximum Capacitace PF/m |
Maximum charging current at normal voltage and frequency mA/m |
70 |
443 |
568 |
111 |
580 |
371 |
0.45 |
95 |
320 |
410 |
109 |
424 |
417 |
0.50 |
120 |
253 |
325 |
105 |
342 |
459 |
0.55 |
150 |
206 |
265 |
103 |
284 |
494 |
0.59 |
185 |
164 |
211 |
99.5 |
233 |
543 |
0.65 |
240 |
125 |
161 |
96.6 |
188 |
583 |
0.70 |
300 |
100 |
130 |
94.7 |
161 |
602 |
0.72 |
400 |
77.8 |
102 |
92.5 |
138 |
627 |
0.75 |
500 |
60.5 |
81.0 |
90.7 |
122 |
654 |
0.79 |
630 |
46.9 |
64.0 |
87.6 |
109 |
737 |
0.87 |
Ratings
Cross-sectional area |
Current Ratings |
Short circuit ratings |
|||
Laid direct in ground |
Drawn into ducts |
Laid in air |
One second short circuit rating of conductor |
One second short circuit rating of copper per core |
|
70 |
210 |
215 |
240 |
6.3 |
2.6 |
95 |
250 |
255 |
300 |
8.5 |
2.6 |
120 |
280 |
285 |
335 |
11.0 |
2.6 |
150 |
320 |
315 |
380 |
13.5 |
2.6 |
185 |
360 |
350 |
435 |
17.0 |
2.6 |
240 |
415 |
405 |
510 |
22.3 |
4.3 |
300 |
475 |
455 |
600 |
28.0 |
4.3 |
400 |
540 |
510 |
700 |
36.6 |
5.8 |
500 |
610 |
570 |
810 |
46.2 |
5.8 |
630 |
680 |
640 |
930 |
58.3 |
5.8 |