ACADEMY OF KNOWLEDGE

Current Ratings & Volt Drop - IEE

TABLE 4A2 Schedule of appropriate current ratings tables - IEE

Specification number	Specification Title	Applicable Current Rating Tables	Conductor Operating Temperature

BS5467:1997	Specification for 600/1000V & 1900/3300V armoured electric cables having thermosetting insulation	4E3, 4E4, 4L3, 4L4	90ºC
BS6004:2000	Electric cables. PVC insulated, non-armoured cables for voltages up to and including 450/750V, for electric power, lighting & internal wiring	4D1, 4D2, 4E1	70ºC, 90ºC
	PVC insulated & sheathed flat cable with protective conductor to Table 8	4D5	70ºC
BS6207-1:1995	Mineral insulated cables with a rated voltage not exceeding 750V	4J1, 4J2	70ºC, 105ºC
BS6346:1997	Specification for 600/1000V & 1900/3300V armoured electric cables having PVC insulation	4D3, 4D4, 4K3, 4K4	70ºC
BS6500:2000	Electric cbales. Flexible cords rated up to 300/500V, for use with appliances and equipment intended for domestic, office and similar environments	4H3	60ºC, 90ºC
BS6724:1997	Specification for 600/1000V & 1900/3300Varmoured electric cables having thermosetting insulation and low emission of smoke and corrosive gases when affected by fire	4E3, 4E4, 4L3, 4L4	90ºC
BS6883:1999	Elastomer insulated cables for fixed wiring in ships and on mobile & fixed offshore units. Requirements & test methods	4F1, 4F2	85ºC
BS7211:1998	Specification for thermosetting insulated cables (non-armoured) for electric power & lighting with low emission of smoke & corrosive gases when affected by fire	4E1, 4E2	90ºC
BS7629-1:1997	Specification for 300/500V fire resistant electric cables having low emission of smoke & corrosive gases when affected by fire. Multicore cables	4D2	70ºC
BS7846:2000	Electric cables. 600/1000V armoured fire-resistant electric cables having thermosetting insulation & low emission of smoke and corrosive gases when affected by fire	4E4	90ºC
BS7889:1997	Specification for 600/1000V single-core unarmoured electric cables having thermosetting insulation	4E1, 4L1	90ºC
BS7919:2001	Electric cables. Flexible cables rated up to 450/750V, for use with appliances & equipment intended for industrial & similar environments	4H1, 4H2, 4H3	60ºC, 110ºC
BS8436:2004	300/500V screened electric cables having low emission of smoke & corrosive gases when affected by fire, for use in thin partitions and building voids	4D2	70ºC
BSEN60702-1:2001	Mineral insulated cables and their terminations with a rated voltage not exceeding 750V. Cables	4J1, 4J2	70ºC, 105ºC

	* sheath operating temperature

TABLE 4A3 Schedule of appropriate current ratings tables - IEE

Specification Number	Specification Title	Applicable Current Rating Tables (16th edition tables)	Conductor Operating Temperature
BS5467:1997	Electric cables - thermosetting insulated armoured cables for voltages of 600/1000V & 1900/3300V	4E3, 4E4, 4J3, 4J4 (4L3, 4L4)	90ºC
BS6004:2000	Electric cables - PVC insulated, non-armoured cables for voltages up to and including 450/750V, for electric power, lighting & internal wiring	4D1, 4D2	70ºC
	Thermoplastic insulated & sheathed flat cable with protective conductor to Table 8	4D5	70ºC
BS6231	Electic cables - single-core PVC insulated flexible cables of rated voltage 600/1000Vfor switchgear & controlgear wiring	4D1	70ºC*.
BS6346:1997	Electric cables - PVC insulated, armoured cables for voltages of 600/1000V & 1900/3300V	4D3, 4D4, 4H3, 4H4 (4K3, 4K4), 4J3, 4J4	70ºC
BS6500:2000	Electric cbales - Flexible cords rated up to 300/500V, for use with appliances and equipment intended for domestic, office and similar environments	4F3 (4H3)	60ºC, 90ºC
BS6724:1997	Electric cables - thermosetting insulated, armoured cables for voltages of 600/1000V & 1900/3300V having low emission of smoke and corrosive gases when affected by fire	4E3, 4E4, 4J3, 4J4 (4L3, 4L4)	90ºC
BS7211:1998	Electric cables - thermosetting insulated non-armoured cables for voltages up to and including 450-750V for electric power, lighting & internal wiring and having low emission of smoke & corrosive gases when affected by fire	4E2	90ºC
BS7629-1:1997	Specification for 300/500V fire resistant electric cables having low emission of smoke & corrosive gases when affected by fire. Multicore cables	4D2	70ºC
BS7846:2000	Electric cables - 600/1000V armoured fire-resistant electric cables having thermosetting insulation & low emission of smoke and corrosive gases when affected by fire	4E3, 4E4, 4J3, 4J4	90ºC
BS7889:1997	Electric cables - thermosetting insulated, armoured cables for a voltatge of 600/1000V	4E1	90ºC
BS7919:2001	Electric cables - Flexible cables rated up to 450/750V, for use with appliances & equipment intended for industrial & similar environments	4F1, 4F2, 4F3, (4H1, 4H2, 4H3)	60ºC, 90ºC
BS8436:2004	Electric cables - 300/500V screened electric cables having low emission ofsmoke & corrosive gases when affected by fire, for use in walls, partitions and building voids - multicore cables	4D2	70ºC
BSEN60702-1:2001	Mineral insulated cables and their terminations with a rated voltage not exceeding 750V. Cables	4G1, 4G2 (4J1, 4J2)	70ºC, 105ºC


	* cables to BS6231 when installed in conduit or trunking are rated to 70ºC
	** sheath operating temperature

Table 4D1A PVC Insulation / Copper / Single-core / Non-armoured - IEE

Standard: BS 7671
Table 4D1A
Single-core 70 °C thermoplastic insulated cables, non armoured, with or without sheath
Copper conductors
Conductor temperature: 70 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
					Reference Method C (Clipped direct)		Touching			Spaced by one diameter
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 single-phase cables AC or DC or 3 cables three-phase AC flat
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
1	11	10.5	13.5	12	15.5	14	-	-	-	-	-
1.5	14.5	13.5	17.5	15.5	20	18	-	-	-	-	-
2.5	20	18	24	21	27	25	-	-	-	-	-
4	26	24	32	28	37	33	-	-	-	-	-
6	34	31	41	36	47	43	-	-	-	-	-
10	46	42	57	50	65	59	-	-	-	-	-
16	61	56	76	68	87	79	-	-	-	-	-
25	80	73	101	89	114	104	131	114	110	146	130
35	99	89	125	110	141	129	162	143	137	181	162
50	119	108	151	134	182	167	196	174	167	219	197
70	151	136	192	171	234	214	251	225	216	281	254
95	182	164	232	207	284	261	304	275	264	341	311
120	210	188	269	239	330	303	352	321	308	396	362
150	240	216	300	262	381	349	406	372	356	456	419
185	273	245	341	296	436	400	463	427	409	521	480
240	321	286	400	346	515	472	546	507	485	615	569
300	367	328	458	394	594	545	629	587	561	709	659
400	-	-	546	467	694	634	754	689	656	852	795
500	-	-	626	533	792	723	868	789	749	982	920
630	-	-	720	611	904	826	1005	905	855	1138	1070
800	-	-	-	-	1030	943	1086	1020	971	1265	1188
1000	-	-	-	-	1154	1058	1216	1149	1079	1420	1337

Table 4D2A PVC Insulation / Copper / Multi-core / Non-armoured - IEE

Standard : BS 7671
Table 4D2A
Multi-core 70 °C thermoplastic insulated and thermoplastic sheathed cables, non armoured
Copper conductors
Conductor temperature: 70 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7	8	9
1	11	10	13	11.5	15	13.5	17	14.5
1.5	14	13	16.5	15	19.5	17.5	22	18.5
2.5	18.5	17.5	23	20	27	24	30	25
4	25	23	30	27	36	32	40	34
6	32	29	38	34	46	41	51	43
10	43	39	52	46	63	57	70	60
16	57	52	69	62	85	76	94	80
25	75	68	90	80	112	96	119	101
35	92	83	111	99	138	119	148	126
50	110	99	133	118	168	144	180	153
70	139	125	168	149	2134	184	232	196
95	167	150	201	179	258	223	282	238
120	192	172	232	206	299	259	328	276
150	219	196	258	225	344	299	379	319
185	248	223	294	255	392	341	434	364
240	291	261	344	297	461	403	514	430
300	334	298	394	339	530	464	593	497
400	-	-	470	402	634	557	715	597

Table 4D3A PVC Insulation / Copper / Single-core / Armoured - IEE

Standard: BS 7671
Table 4D3A
Single-core armoured 70 °C thermoplastic insulated cables
Copper conductors
Conductor temperature: 70 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
	Touching		Touching			Spaced by one cable diameter
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 DC cables		2 AC cables single-phase AC		3 or 4 cables three-phase AC
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical	Horizontal	Vertical	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
50	193	179	205	189	181	229	216	229	217	230	212
70	245	225	259	238	231	294	279	287	272	286	263
95	296	269	313	285	280	357	340	349	332	338	313
120	342	309	360	327	324	415	396	401	383	385	357
150	393	352	413	373	373	479	458	449	429	436	405
185	447	399	469	422	425	548	525	511	489	490	456
240	525	465	550	492	501	648	622	593	568	566	528
300	594	515	624	547	567	748	719	668	640	616	578
400	687	575	723	618	657	885	851	737	707	674	632
500	763	622	805	673	731	1035	997	810	777	721	676
630	843	669	891	728	809	1218	1174	893	856	771	723
800	919	710	976	777	886	1441	1390	943	905	824	772
1000	975	737	1041	808	945	1685	1627	1008	967	872	816

Table 4D4A PVC Insulation / Copper / Multi-core / Armoured - IEE

Standard: BS 7671
Table 4D4A
Multi-core armoured 70 °C thermoplastic insulated cables
Copper conductors
Conductor temperature: 70 °C
Air Ambient temperature: 30 °C
Ground Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)		Reference Method F (direct in ground or in ducting in ground, in or around buildings)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7
1.5	21	18	22	19	22	18
2.5	28	25	31	26	29	24
4	38	33	41	35	37	30
6	49	42	53	45	46	38
10	67	58	72	62	60	507
16	89	77	97	83	78	64
25	118	102	128	110	99	82
35	145	125	157	135	119	98
50	175	151	190	163	140	116
70	222	192	241	207	173	143
95	269	231	291	251	204	169
120	310	267	336	290	231	192
150	356	306	386	332	261	217
185	405	348	439	378	292	243
240	476	409	516	445	336	280
300	547	469	592	510	379	316
400	621	540	683	590	-	-

Table 4E1A XLPE Insulation / Copper / Single-core / Non-armoured - IEE

Standard: BS 7671
Table 4E1A
Single-core 90 °C thermosetting insulated cables, non armoured, with or without sheath
Copper conductors
Conductor temperature: 90 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
					Reference Method C (Clipped direct)		Touching			Spaced by one diameter
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 single-phase cables AC or DC or 3 cables three-phase AC flat
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
1	14	13	17	15	19	17.5	-	-	-	-	-
1.5	19	17	23	20	25	23	-	-	-	-	-
2.5	26	23	31	28	34	31	-	-	-	-	-
4	35	31	42	37	46	41	-	-	-	-	-
6	45	40	54	48	59	54	-	-	-	-	-
10	61	54	75	66	81	74	-	-	-	-	-
16	81	73	100	88	109	99	-	-	-	-	-
25	106	95	133	117	143	130	161	141	135	182	161
35	131	117	164	144	176	161	200	176	169	226	201
50	158	141	198	175	228	209	242	216	207	275	246
70	200	179	253	222	293	268	310	279	268	353	318
95	241	216	306	269	355	326	377	342	328	430	389
120	278	249	354	312	413	379	437	400	383	500	454
150	318	285	393	342	476	436	504	464	444	577	527
185	362	324	449	384	545	500	575	533	510	661	605
240	424	380	528	450	644	590	679	634	607	781	719
300	486	435	603	514	743	681	783	736	703	902	833
400	-	-	683	584	868	793	940	868	823	1085	1008
500	-	-	783	666	990	904	1083	998	946	1253	1169
630	-	-	900	764	1130	1033	1254	1151	1088	1454	1362
800	-	-	-	-	1288	1179	1358	1275	1214	1581	1485
1000	-	-	-	-	1443	1323	1520	1436	1349	1775	1671

Table 4E2A XLPE Insulation / Copper / Multi-core / Non-armoured - IEE

Standard: BS 7671
Table 4E2A
Multi-core 90 °C thermosetting insulated and thermoplastic sheathed cables, non armoured
Copper conductors
Conductor temperature: 90 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7	8	9
1	14.5	13	17	15	19	17	21	18
1.5	18.5	16.5	22	19.5	24	22	26	23
2.5	25	22	30	26	33	30	36	32
4	33	30	40	35	45	40	49	42
6	42	38	51	44	58	52	63	54
10	57	51	69	60	80	71	86	75
16	76	68	91	80	107	96	115	100
25	99	89	119	105	138	119	149	127
35	121	109	146	128	171	147	185	158
50	145	130	175	154	209	179	225	192
70	183	164	221	194	269	229	289	246
95	220	197	265	233	328	278	352	298
120	253	227	305	268	382	322	410	346
150	290	259	334	300	441	371	473	399
185	329	295	384	340	506	424	542	456
240	386	346	459	398	599	500	641	538
300	442	396	532	455	693	576	741	621
400	-	-	625	536	803	667	865	741

Table 4E3A XLPE Insulation / Copper / Single-core / Armoured - IEE

Standard: BS 7671
Table 4E3A
Single-core armoured 90 °C thermosetting insulated cables
Copper conductors
Conductor temperature: 90 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
	Touching		Touching			Spaced by one cable diameter
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 DC cables		2 AC cables single-phase AC		3 or 4 cables three-phase AC
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical	Horizontal	Vertical	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
50	237	220	253	232	222	284	270	282	266	288	266
70	303	277	322	293	285	356	349	357	337	358	331
95	367	333	389	352	246	446	426	436	412	425	393
120	425	383	449	405	402	519	497	504	477	485	449
150	488	437	516	462	463	600	575	566	539	549	510
185	557	496	587	524	529	688	660	643	614	618	574
240	656	579	689	612	625	815	782	749	714	715	666
300	755	662	792	700	720	943	906	842	805	810	755
400	853	717	899	767	815	1137	1094	929	889	848	797
500	962	791	1016	851	918	1314	1266	1032	989	923	871
630	1082	861	1146	935	1027	1528	1474	1139	1092	992	940
800	1170	904	1246	987	1119	1809	1744	1204	1155	1042	978
1000	1261	961	1345	1055	1214	2100	2026	1289	1238	1110	1041

Table 4E4A XLPE Insulation / Copper / Multi-core / Armoured - IEE

Standard: BS 7671
Table 4E4A
Multi-core armoured 90 °C thermosetting insulated cables
Copper conductors
Conductor temperature: 90 °C
Air Ambient temperature: 30 °C
Ground Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)		Reference Method F (direct in ground or in ducting in ground, in or around buildings)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7
1.5	27	23	29	25	25	21
2.5	36	31	39	33	33	28
4	49	42	52	44	43	36
6	62	53	66	56	53	44
10	85	73	90	78	71	58
16	110	94	115	99	91	75
25	146	124	152	131	116	96
35	180	154	188	162	139	115
50	219	187	228	197	164	135
70	279	238	291	251	203	167
95	338	289	354	304	239	197
120	392	335	410	353	271	223
150	451	386	472	406	306	251
185	515	441	539	463	343	281
300	698	599	732	628	446	365
400	787	673	847	728	-	-

Table 4H1A PVC Insulation / Aluminium / Single-core / Non-armoured - IEE

Standard: BS 7671
Table 4H1A
Single-core 70 °C thermoplastic insulated cables, non armoured, with or without sheath
Aluminium conductors
Conductor temperature: 70 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
					Reference Method C (Clipped direct)		Touching			Spaced by one diameter
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 single-phase cables AC or DC or 3 cables three-phase AC flat
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
50	93	84	118	104	125	110	149	133	128	169	152
70	118	107	150	133	160	140	192	173	166	217	196
95	142	129	181	161	195	170	235	212	203	265	241
120	164	149	210	186	226	197	273	247	237	308	282
150	189	170	234	204	261	227	316	287	274	356	327
185	215	194	266	230	298	259	363	330	316	407	376
240	252	227	312	269	352	305	430	392	375	482	447
300	289	261	358	306	406	351	497	455	434	557	519
380	-	-	413	352	511	472	543	502	507	625	584
480	-	-	477	405	591	546	629	582	590	726	680
600	-	-	545	462	679	626	722	669	680	837	787
740	-	-	-	-	771	709	820	761	776	956	902
960	-	-	-	-	900	823	953	886	907	1125	1066
1200	-	-	-	-	1022	926	1073	999	1026	1293	1229

Table 4H2A PVC Insulation / Aluminium / Multi-core / Non-armoured - IEE

Standard: BS 7671
Table 4H2A
Multi-core 70 °C thermoplastic insulated and thermoplastic sheathed cables, non armoured
Aluminium conductors
Conductor temperature: 70 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7	8	9
16	44	41	54	48	66	59	73	61
25	58	53	71	62	83	73	89	78
35	71	65	86	77	103	90	111	96
50	86	78	104	92	125	110	135	117
70	108	98	131	116	160	140	173	150
95	130	118	157	139	195	170	210	183
120	-	135	-	160	-	197	-	212
150	-	155	-	176	-	227	-	245
185	-	176	-	199	-	259		280
240	-	207	-	232	-	305	-	330
300	-	237	-	265	-	351	-	381

Table 4H3A PVC Insulation / Aluminium / Single-core / Armoured - IEE

Standard: BS 7671
Table 4H3A
Single-core armoured 70 °C thermoplastic insulated cables
Aluminium conductors
Conductor temperature: 70 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
	Touching		Touching			Spaced by one cable diameter
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 DC cables		2 AC cables single-phase AC		3 or 4 cables three-phase AC
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical	Horizontal	Vertical	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
50	143	133	152	141	131	167	157	168	159	169	155
70	183	168	194	178	168	214	202	212	200	213	196
95	221	202	234	214	205	261	247	259	245	255	236
120	255	233	270	246	238	303	288	299	285	293	272
150	294	267	310	282	275	349	333	340	323	335	312
185	334	303	352	319	315	400	382	389	371	379	354
240	393	354	413	374	372	472	452	457	437	443	415
300	452	405	474	427	430	545	523	520	498	505	475
380	518	452	543	479	497	638	613	583	559	551	518
480	586	501	616	534	568	742	715	655	629	604	568
600	658	550	692	589	642	859	828	724	696	656	618
740	728	596	769	642	715	986	952	802	770	707	666
960	819	651	868	706	808	1171	1133	866	832	770	726
1200	893	692	952	756	880	1360	1317	938	902	822	774

Table 4H4A PVC Insulation / Aluminium / Multi-core / Armoured - IEE

Standard: BS 7671
Table 4H4A
Multi-core armoured 70 °C thermoplastic insulated cables
Aluminium conductors
Conductor temperature: 70 °C
Air Ambient temperature: 30 °C
Ground Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)		Reference Method F (direct in ground or in ducting in ground, in or around buildings)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7
16	68	58	71	61	-	-
25	89	76	94	80	77	64
35	109	94	115	99	93	77
50	131	113	139	119	109	91
70	165	143	175	151	135	112
95	199	174	211	186	159	132
120	-	202	-	216	-	1502
150	-	232	-	250	-	169
185	-	265	-	287	-	190
240	-	312	-	342	-	218
300	-	360	-	399	-	247

Table 4J1A XLPE Insulation / Aluminium / Single-core / Non-armoured - IEE

Standard:BS 7671
Table 4J1A
Single-core 90 °C thermosetting insulated cables, non armoured, with or without sheath
Aluminium conductors
Conductor temperature: 90 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
					Reference Method C (Clipped direct)		Touching			Spaced by one diameter
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 single-phase cables AC or DC or 3 cables three-phase AC flat
	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC	3 or 4 cables, three- phase AC	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
50	125	113	157	140	154	136	184	165	159	210	188
70	158	142	200	179	198	174	237	215	206	271	244
95	191	171	242	217	242	211	289	264	253	332	300
120	220	197	281	251	280	245	337	308	296	387	351
150	253	226	307	267	324	283	389	358	343	448	408
185	288	256	351	300	371	323	447	413	395	515	470
240	338	300	412	351	439	382	530	492	471	611	561
300	387	344	471	402	508	440	613	571	544	708	652
380	-	-	-	-	658	594	679	628	638	798	742
480	-	-	-	-	765	692	786	728	743	927	865
600	-	-	-	-	871	791	903	836	849	1058	990
740	-	-	-	-	1001	911	1025	951	979	1218	1143
960	-	-	-	-	1176	1072	1191	1108	1151	1440	1355
1200	-	-	-	-	1333	1217	1341	1249	1307	1643	1550

Table 4J2A XLPE Insulation / Aluminium / Multi-core / Non-armoured - IEE

Standard: BS 7671
Table 4J2A
Multi-core 90 °C thermosetting insulated and thermoplastic sheathed cables, non armoured
Aluminium conductors
Conductor temperature: 90 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method A (enclosed in conduit in thermally insulated wall etc.)		Reference Method B (enclosed in conduit on a wall or in trunking etc.)		Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7	8	9
16	60	55	72	64	84	76	91	77
25	78	71	94	84	101	90	108	97
35	96	87	115	103	126	112	135	120
50	115	104	138	124	154	136	164	146
70	145	131	175	156	198	174	211	187
95	175	157	210	188	241	211	257	227
120	-	180	-	216	-	245	-	263
150	-	206	-	240	-	283	-	304
185	-	233	-	272	-	323	-	347
240	-	273	-	318	-	382	-	409
300	-	313	-	364	-	440	-	471

Table 4J3A XLPE Insulation / Aluminium / Single-core / Armoured - IEE

Standard: BS 7671
Table 4J3A
Single-core armoured 90 °C thermosetting insulated cables
Aluminium conductors
Conductor temperature: 90 °C
Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (clipped direct)		Reference Method F (in free air or in perforated cable tray horizontal or vertical)
	Touching		Touching			Spaced by one cable diameter
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	2 DC cables		2 AC cables single-phase AC		3 or 4 cables three-phase AC
	2 cables, single- phase AC or DC flat	3 or 4 cables, three- phase AC flat	2 cables, single- phase AC or DC flat	3 cables, three- phase AC flat	3 cables, three- phase AC trefoil	Horizontal	Vertical	Horizontal	Vertical	Horizontal	Vertical

1	2	3	4	5	6	7	8	9	10	11	12
50	179	165	192	176	162	216	197	212	199	215	192
70	228	209	244	222	207	275	253	269	254	270	244
95	276	252	294	267	252	332	307	328	310	324	296
120	320	291	340	308	292	384	357	378	358	372	343
150	368	333	390	352	337	441	411	429	409	424	394
185	419	378	444	400	391	511	480	490	467	477	447
240	494	443	521	468	465	605	572	576	549	554	523
300	568	508	597	536	540	701	666	654	624	626	595
380	655	573	688	608	625	812	780	735	704	693	649
480	747	642	786	685	714	942	906	825	790	765	717
600	836	706	880	757	801	1076	1036	909	872	832	780
740	934	764	988	824	897	1250	1205	1204	989	890	835
960	1056	838	1121	911	1014	1488	1435	1094	1052	970	911
1200	1163	903	1236	990	1118	1715	1658	1187	1141	1043	980

Table 4J4A XLPE Insulation / Aluminium / Multi-core / Armoured - IEE

Standard: BS 7671
Table 4J4A
Multi-core armoured 90 °C thermosetting insulated cables
Aluminium conductors
Conductor temperature: 90 °C
Air Ambient temperature: 30 °C
Ground Ambient temperature: 30 °C

Conductor nominal cross- sectional area [mm²]	Current-carrying capacities in [A]
	Reference Method C (Clipped direct)		Reference Method E (in free air or in perforated cable tray horizontal or vertical)		Reference Method F (direct in ground or in ducting in ground, in or around buildings)
	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC	1 two-core cable,single-phase AC or DC	1 three-core cable or 1 four-core cable three-phase AC

1	2	3	4	5	6	7
16	82	71	85	74	71	59
25	108	92	112	98	90	75
35	132	113	138	120	108	90
50	159	137	166	145	128	106
70	201	174	211	185	158	130
95	242	214	254	224	186	154
120	-	249	-	264	-	174
150	-	284	-	305	-	197
185	-	328	-	350	-	220
240	-	386	-	418	-	253
300	-	441	-	488	-	286

ACADEMY OF KNOWLEDGE

Current Ratings & Volt Drop - IEE

TABLE 4A2 Schedule of appropriate current ratings tables - IEE

TABLE 4A3 Schedule of appropriate current ratings tables - IEE

Table 4D1A PVC Insulation / Copper / Single-core / Non-armoured - IEE

Table 4D2A PVC Insulation / Copper / Multi-core / Non-armoured - IEE

Table 4D3A PVC Insulation / Copper / Single-core / Armoured - IEE

Table 4D4A PVC Insulation / Copper / Multi-core / Armoured - IEE

Table 4E1A XLPE Insulation / Copper / Single-core / Non-armoured - IEE

Table 4E2A XLPE Insulation / Copper / Multi-core / Non-armoured - IEE

Table 4E3A XLPE Insulation / Copper / Single-core / Armoured - IEE

Table 4E4A XLPE Insulation / Copper / Multi-core / Armoured - IEE

Table 4H1A PVC Insulation / Aluminium / Single-core / Non-armoured - IEE

Table 4H2A PVC Insulation / Aluminium / Multi-core / Non-armoured - IEE

Table 4H3A PVC Insulation / Aluminium / Single-core / Armoured - IEE

Table 4H4A PVC Insulation / Aluminium / Multi-core / Armoured - IEE

Table 4J1A XLPE Insulation / Aluminium / Single-core / Non-armoured - IEE

Table 4J2A XLPE Insulation / Aluminium / Multi-core / Non-armoured - IEE

Table 4J3A XLPE Insulation / Aluminium / Single-core / Armoured - IEE

Table 4J4A XLPE Insulation / Aluminium / Multi-core / Armoured - IEE

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