Power Cables

PVC Insulated & Sheathed Unarmoured

XLPE Insulated PVC/LSOH Sheathed

LSOH Insulated Conduit Wires

Power Cables

BS 6622 Three Core Armoured 15KV XLPE Stranded Copper Conductors

Construction

cross-sectional area mm²	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	4.5	19.4	1.5	56/2.5	2.8	58.8
70	4.5	21.2	1.5	60/2.5	2.9	62.9
95	4.5	22.9	1.6	65/2.5	3.0	67.0
120	4.5	24.4	1.7	68/2.5	3.1	70.6
150	4.5	25.7	1.7	71/2.5	3.2	73.6
185	4.5	27.5	1.8	61/3.15	3.4	79.4
240	4.5	29.7	1.9	65/3.15	3.6	84.7
300	4.5	32.0	2.0	70/3.15	3.7	90.1
400	4.5	34.7	2.1	75/3.15	4.0	96.7

Installation

cross-sectional area mm²	Approximate cable weight kg/m	Nominal drum length m	Minimum bending radius mm	Nominal internal diameter of ducts mm
50	6.1	500	900	100
70	7.1	500	950	100
95	8.3	500	1050	125
120	9.4	500	1100	125
150	10.5	450	1150	125
185	12.9	400	1200	125
240	15.2	350	1300	125
300	17.6	300	1400	125
400	20.8	250	1500	125

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
50	387	494	123	508	211	0.58
70	268	343	115	361	240	0.65
95	193	248	109	270	267	0.73
120	153	196	105	223	291	0.79
150	124	159	102	189	312	0.85
185	99.1	128	98.6	162	340	0.93
240	75.4	98	95.2	137	375	1.02
300	60.1	80	92.2	123	411	1.12
400	47	64	89.3	110	454	1.24

Ratings

Cross-sectional area mm²	Current Ratings			Short circuit ratings
Cross-sectional area mm²	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