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 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