Power Cables

PVC Insulated & Sheathed Unarmoured

PVC Insulated & Sheathed Armoured

XLPE Insulated PVC/LSOH Sheathed

LSOH Insulated Conduit Wires

Power Cables

BS 6622 Single Core Armoured 6.6kV XLPE Stranded Aluminium Conductor

Construction

Size mmsq	Minimum Average Thickness of Insulation mm	Nominal Area of Copper Tape Screen mm sq	Nominal Thickness of Bedding	Nominal number and diameter of armoured wires no./ mm	Nominal Thickness of Sheath mm	Nominal Overall Diameter mm
70	2.5	16.8	1.2	38/1.6	1.8	27.5
95	2.5	18.5	1.2	41/1.6	1.9	29.4
120	2.5	20	1.2	44/1.6	1.9	30.9
150	2.5	21.3	1.2	46/1.6	2.0	32.4
185	2.5	23.1	1.2	40/2.0	2.0	35.0
240	2.6	25.5	1.2	43/2.0	2.1	37.6
300	2.8	28.3	1.2	47/2.0	2.2	40.8
400	3	31.4	1.2	51/2.0	2.3	44.1
500	3.2	34.7	1.3	46/2.5	2.5	49.0
630	3.2	38.6	1.4	50/2.5	2.6	53.3

Installation

Size mmsq	Approximate Cable Weight kg/m	Nominal Drum Length m	Minimum Bending Radius mm	Nominal Internal Diameter of Ducts mm
70	1.0	1000	450	100
95	1.2	1000	450	100
120	1.3	1000	500	100
150	1.5	500	500	100
185	1.7	500	550	100
240	2.0	500	600	100
300	2.4	500	650	100
400	2.8	500	700	100
500	3.4	300	750	100
630	4.1	300	800	100

Electrical Performance

Size 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	125	582	371	0.45
95	320	410	119	427	417	0.50
120	253	325	114	344	459	0.55
150	206	265	111	288	494	0.59
185	164	211	109	238	543	0.65
240	125	161	105	193	583	0.70
300	100	130	103	167	602	0.72
400	77.8	102	99.9	143	627	0.75
500	60.5	81.0	99.2	129	654	0.79
630	46.9	64.0	95.5	116	737	0.87

Ratings

Size mmsq	Current Ratings			Short circuit ratings
Size mmsq	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
70	210	210	240	6.3	-
95	250	245	295	8.5	-
120	280	275	335	11.0	Typically
150	315	300	380	13.5	Less
185	355	335	435	17.0	Then
240	405	380	510	22.3	1kA
300	455	420	580	28.0	-
400	510	455	670	36.6	-
500	570	500	770	46.2	-
630	640	550	880	58.3	-