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

Power Cables

BS 6622 Single Core Unarmoured (Copper Wire Screened) 11kV XLPE Stranded Aluminium Conductors

Construction

cross-sectional area mmsq Minimum average thickness of insulation mm Nominal diameter over insulation
mm 		Nominal area of copper wire screen
mm sq		 Nominal average thickness of PVC oversheath
mm 		Nominal overall diameter of cable mm
70 3.4 18.8 16 1.7 25.7
95 3.4 20.5 16 1.8 27.4
120 3.4 22.0 16 1.8 29.2
150 3.4 23.3 16 1.9 30.5
185 3.4 25.1 16 1.9 32.5
240 3.4 27.3 25 2 34.9
300 3.4 29.6 25 2.1 37.2
400 3.4 32.3 35 2.2 40.1
500 3.4 35.2 35 2.3 13.2
630 3.4 39.1 35 2.4 17.4

Installation

cross-sectional area mmsq Approximate cable weight kg/m Nominal drum length
m 		Minimum bending radius mm Nominal internal diameter of ducts mm
70 0.8 1000 400 100
95 0.9 1000 450 100
120 1.1 500 450 100
150 1.2 500 450 100
185 1.3 500 500 100
240 1.7 500 550 100
300 1.9 500 600 100
400 2.3 500 650 100
500 2.7 500 650 100
630 3.2 400 750 100

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
uohms/m 		Impedance at 50Hz uohms/m Maximum Capacitace PF/m Maximum charging current at normal voltage and frequency mA/m
70 443 568 121 581 288 0.58
95 320 410 114 426 323 0.65
120 253 325 110 343 353 0.71
150 206 265 107 286 380 0.76
185 164 211 104 234 416 0.83
240 125 161 100 190 460 0.92
300 100 130 96.9 162 506 1.01
400 77.8 102 94.0 138 561 1.12
500 60.5 81 91.3 122 619 1.24
630 46.9 64 88.1 109 697 1.37

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
70 210 215 240 6.3 2.6
95 250 255 295 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