Power Cables
PVC Insulated & Sheathed Unarmoured XLPE Insulated PVC/LSOH Sheathed LSOH Insulated Conduit Wires Fire Resistant Medium Voltage

Power Cables

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