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) 6.6kV XLPE Stranded Aiuminium Conductors

Construction

cross-sectional area mm2 Minimum average thickness of insulation mm Nominal diameter over insulation
mm  		 Nominal area of copperwire screen mm2 Nominal average thickness of PVC oversheath
mm 		Nominal overall diameter of cable mm
70 2.5 16.8 16.0 1.7 23.5
95 2.5 18.5 16.0 1.7 25.4
120 2.5 20.0 16.0 1.8 26.9
150 2.5 21.3 16.0 1.8 28.5
185 2.5 23.1 16.0 1.9 30.3
240 2.6 25.5 25.0 1.9 32.9
300 2.8 28.3 25.0 2.0 35.9
400 3.0 31.4 35.0 2.2 39.2
500 3.2 34.7 35.0 2.6 42.8
630 3.2 38.6 35.0 3.1 47.0

Installation

cross-sectional area mm2 Approximate cable weight kg/m Nominal drum length
m 		Minimum bending radius mm Nominal internal diameter of ducts mm
70 0.7 1000 400 100
95 0.8 1000 400 100
120 1.0 1000 450 100
150 1.1 500 450 100
185 1.3 500 500 100
240 1.5 500 500 100
300 1.7 500 550 100
400 2.2 500 600 100
500 2.6 500 650 100
630 3.1 300 750 100

Electrical Performance

cross-sectional area mm2 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
70 443 568 111 580 371 0.45
95 320 410 109 424 417 0.50
120 253 325 105 342 459 0.55
150 206 265 103 284 494 0.59
185 164 211 99.5 233 543 0.65
240 125 161 96.6 188 583 0.70
300 100 130 94.7 161 602 0.72
400 77.8 102 92.5 138 627 0.75
500 60.5 81.0 90.7 122 654 0.79
630 46.9 64.0 87.6 109 737 0.87

Ratings

Cross-sectional area
mm2		 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
95 250 255 300 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