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 33KV 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 8 27.1 1.8 60/3.15 3.4 78.5
70 8 28.9 1.8 64/3.15 3.5 82.6
95 8 30.6 1.9 67/3.15 3.6 86.7
120 8 32.1 2.0 70/3.15 3.7 90.3
150 8 33.4 2.0 72/3.15 3.8 93.3
185 8 35.2 2.1 76/3.15 3.9 97.6
240 8 37.4 2.2 80/3.15 4.1 102.9
300 8 39.7 2.3 85/3.15 4.3 108.5
400 8 42.4 2.4 90/3.15 4.5 114.9

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 9.7 350 1450 125
70 10.7 350 1500 125
95 12 300 1600 125
120 13.3 250 1650 150
150 14.4 250 1700 150
185 16.1 250 1800 150
240 18.4 250 1900 150
300 21 250 2000 150
400 24.2 250 2100 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
50 387 494 143 513 142 0.85
70 268 343 134 367 159 0.95
95 193 248 127 278 175 1.05
120 153 196 122 231 189 1.13
150 124 159 118 197 201 1.21
185 99.1 128 114 171 217 1.30
240 75.4 98 109 146 237 1.42
300 60.1 80 105 131 258 1.55
400 47.0 64 102 120 282 1.69

Ratings

Cross-sectional area
mmsq		 Current Ratings Short circuit ratings
Laid 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