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BS 6622 Three Core Armoured 11kV 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 | 3.4 | 17.0 | 1.4 | 50/2.5 | 2.6 | 53.1 |
70 | 3.4 | 18.8 | 1.4 | 54/2.5 | 2.7 | 57.1 |
95 | 3.4 | 20.5 | 1.5 | 59/2.5 | 2.8 | 61.2 |
120 | 3.4 | 22.0 | 1.6 | 62/2.5 | 3.0 | 65.0 |
150 | 3.4 | 23.3 | 1.6 | 65/2.5 | 3.1 | 68.0 |
185 | 3.4 | 25.1 | 1.7 | 70/2.5 | 3.2 | 72.3 |
240 | 3.4 | 27.3 | 1.8 | 61/3.15 | 3.4 | 79.0 |
300 | 3.4 | 29.6 | 1.9 | 65/3.15 | 3.6 | 84.5 |
400 | 3.4 | 32.3 | 2.0 | 70/3.15 | 3.8 | 90.9 |
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 | 5.5 | 750 | 650 | 100 |
70 | 6.4 | 500 | 700 | 100 |
95 | 7.5 | 500 | 750 | 100 |
120 | 8.6 | 500 | 800 | 100 |
150 | 9.6 | 450 | 850 | 125 |
185 | 11.2 | 450 | 900 | 125 |
240 | 14.2 | 450 | 950 | 125 |
300 | 16.5 | 350 | 1050 | 125 |
400 | 19.7 | 300 | 1100 | 125 |
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 | 115 | 506 | 260 | 0.52 |
70 | 268 | 343 | 108 | 360 | 298 | 0.60 |
95 | 193 | 248 | 102 | 268 | 334 | 0.67 |
120 | 153 | 196 | 98.8 | 220 | 365 | 0.73 |
150 | 124 | 159 | 96.2 | 186 | 392 | 0.78 |
185 | 99.1 | 128 | 93.1 | 158 | 430 | 0.86 |
240 | 75.4 | 98 | 90.0 | 134 | 476 | 0.95 |
300 | 60.1 | 80 | 87.4 | 119 | 524 | 1.05 |
400 | 47.0 | 64 | 84.9 | 106 | 580 | 1.16 |
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 | 180 | 220 | 6.8 | Typically less then 1kA |
70 | 255 | 215 | 270 | 9.8 | |
95 | 300 | 255 | 330 | 13.3 | |
120 | 340 | 290 | 375 | 17.2 | |
150 | 380 | 330 | 430 | 21.2 | |
185 | 430 | 370 | 490 | 26.6 | |
240 | 490 | 425 | 570 | 34.9 | |
300 | 540 | 470 | 650 | 43.8 | |
400 | 590 | 520 | 700 | 57.3 |