Power Cables

PVC Insulated & Sheathed Unarmoured

PVC Insulated & Sheathed Armoured

XLPE Insulated PVC/LSOH Sheathed

LSOH Insulated Conduit Wires

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
Cross-sectional area 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
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