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Choice of cable cross-section

Permissible continuous current for wires with copper conductors with rubber insulation in metal protective sheaths and cables with copper conductors with rubber insulation in lead, PVC, nitrite or rubber sheath, armored and unarmoured.

Conductor cross-section, mm ²	Current *, A, for wires and cables
	single-core	two-core		three-core
	when laying
	in the air	in the air	in the ground	in the air	in the ground
1.5	23	19	33	19	27
2.5	thirty	27	44	25	38
4	41	38	55	35	49
6	50	50	70	42	60
ten	80	70	105	55	90
16	100	90	135	75	115
25	140	115	175	95	150
25	170	140	210	120	180
50	215	175	265	145	225
70	270	215	320	180	275
95	325	260	385	220	330
120	385	300	445	260	385
150	440	350	505	305	435
185	510	405	570	350	500
240	605	-	-	-	-

* Currents refer to wires and cables with and without a zero core.

Permissible continuous current for cables with aluminum conductors with rubber or plastic insulation in lead, PVC and rubber sheaths, armored and unarmoured.

Conductor cross-section, mm ²	Current *, A, for wires and cables
	single-core	two-core		three-core
	when laying
	in the air	in the air	in the ground	in the air	in the ground
2.5	23	21	34	19	29
4	31	29	42	27	38
6	38	38	55	32	46
ten	60	55	80	42	70
16	75	70	105	60	90
25	105	90	135	75	115
35	130	105	160	90	140
50	165	135	205	110	175
70	210	165	245	140	210
95	250	200	295	170	255
120	295	230	340	200	295
150	340	270	390	235	335
185	390	310	440	270	385
240	465	-	-	-	-

Note: Permissible continuous currents for four-core cables with plastic insulation for voltages up to 1 kV can be selected according to the table, as for three-core cables, but with a factor of 0.92.

Copper conductors			Machine current, A	Cable section mm ²	Machine current, A	Aluminum conductors
power, kWt		Current, A				power, kWt		Current, A
220 V	380 V	Current, A				220 V	380 V	Current, A
3.3	6.4	15	ten	1.5
4.6	nine	21	twenty	2.5	16	3.5	6.8	16
5.9	11.5	27	25	4	twenty	4.6	nine	21
7.4	14.5	34	32	6	25	5.7	11.1	26
eleven	21.4	50	50	ten	32	8.3	16.3	38
15.4	thirty	70	63	16	50	12.1	23.5	55
18.7	36.4	85	80	25	63	14.3	27.8	65
22	42.9	100	100	35	63	16.5	32.1	75