KNOWLEDGE ACADEMY

Conductor class mm² / AWG

Conductor class as per BS6360, IEC 60228, NM280 & VDE 0295

Class 1 and 2: shows the required number of wires.
Class 5 and 6: shows the maximum string diameter, there may be fewer filaments as long as the maximum ohms/km is not exceeded
Ohms Ω/km: shows the maximum allowable resistance for bare copper conductors in the indicated classes

Area mm²	Class 1 Training	Class 2 Training	Ohms Ω/km	Class 5 Training	Class 6 Training	Ohms Ω/km
0.14				18 x 0.10	18 x 0.10	138.0
0.25				14 x 0.16	32 x 0.10	79.0
0.34				19 x 0.16	42 x 0.10	57.0
0.5	1 x 0.80	7 x 0.30	36.0	16 x 0.21	28 x 0.10	39.0
0.75	1 x 0.97	7 x 0.37	24.5	24 x 0.21	42 x 0.16	26.0
1.0	1 x 1.13	7 x 0.43	18.1	32 x 0.21	56 x 0.16	19.5
1.5	1 x 1.38	7 x 0.53	12.1	30 x 0.26	84 x 0.16	13.3
2.5	1 x 1.78	7 x 0.67	7.41	50 x 0.26	140 x 0.16	7.98
4.0	1 x 2.26	7 x 0.85	4.61	56 x 0.31	224 x 0.16	4.95
6.0	1 x 2.76	7 x 1.04	3.08	84 x 0.31	192 x 0.21	3.30
10.0	1 x 3.57	7 x 1.35	1.83	80 x 0.41	320 x 0.21	1.91
16.0	1 x 4.51	7 x 1.70	1.15	128 x 0.41	512 x 0.21	1.21
25.0		7 x 2.14	0.72	200 x 0.41	800 x 0.21	0.78
35.0		7 x 2.52	0.524	280 x 0.41	1120 x 0.21	0.554
50.0		19 x 1.78	0.387	400 x 0.41	705 x 0.31	0.386
70.0		19 x 2.14	0.268	356 x 0.51	990 x 0.31	0.272
95.0		19 x 2.52	0.193	485 x 0.51	1340 x 0.31	0.206
120		37 x 2.03	0.153	614 x 0.51	1690 x 0.31	0.161
150		37 x 2.25	0.124	765 x 0.51	2123 x 0.31	0.129
185		37 x 2.52	0.099	944 x 0.51	1470 x 0.41	0.106
240		61 x 2.25	0.074	1225 x 0.5	1905 x 0.41	0.081
300		61 x 2.52	0.060
400		61 x 2.85	0.046
500		61 x 3.20	0.036

AWG CONVERSION X METRIC CONVERSION (mm²)

American Wire Gauge (AWG) to metric conversion (mm²) – The values below are approximate and should only be used for guidance.

AWG	Section mm²	Training	Resistance Ohm/km
38	0.008	1 x 0.10	2,125
38	0.009	7 x 0.04	1,930
36	0.013	1 x 0.12	1,360
36	0.014	7 x 0.05	1,217
34	0.020	1 x 0.16	856
34	0.022	7 x 0.06	777
32	0.032	1 x 0.20	538
32	0.034	7 x 0.08	538
32	0.035	19 x 0.05	446
30	0.051	1 x 0.25	338
30	0.057	7 x 0.10	338
30	0.059	19 x 0.06	286
28	0.080	1 x 0.32	213
28	0.089	7 x 0.12	213
28	0.090	19 x 0.08	186
26	0.128	1 x 0.40	134
26	0.141	7 x 0.16	122
26	0.155	19 x 0.10	113
24	0.205	1 x 0.51	84
24	0.227	7 x 0.20	76
24	0.241	19 x 0.12	69
22	0.324	1 x 0.64	53
22	0.355	1 x 0.25	48
22	0.382	19 x 0.16	45
20	0.519	1 x 0.81	33
20	0.563	7 x 0.32	30.4
20	0.616	19 x 0.20	28.3
18	0.785	16 x 0.25	21.2
18	0.823	1 x 1.02	20.9
18	0.90	7 x 0.40	19.2
18	0.96	19 x 0.25	17.9
16	1.30	1 x 1.29	13.2
16	1.23	19 x 0.28	14.0
14	2.08	1 x 1.62	8.28
14	1.94	19 x 0.36	8.86
12	3.31	1 x 2.05	5.20
12	3.08	19 x 0.45	5.58
10	5.26	1 x 2.58	3.28
10	5.26	19 x 0.6	3.28
8	8.38	1 x 3.26	2.06
8	8.35	19 x 0.75	2.06
6	13.29	1 x 4.11	1.59
6	13.29	19 x 0.96	1.59
4	21.15	1 x 5.18	0.815
4	21.14	19 x 1.19	0.815
2	33.63	1 x 6.54	0.513
2	33.61	19 x 1.50	0.513
1	42.41	1 x 7.34	0.424
1	42.38	19 x 1.68	0.424
1/0	53.4	19 x 1.89	0.253
2/0	67.4	19 x 2.17	0.291
4/0	107	19 x 2.68	0.182
250MCM	127	37 x 2.09	0.139
300MCM	152	37 x 2.29	0.119
350MCM	177	37 x 2.47	0.102
400MCM	202	37 x 2.64	0.091
500MCM	253	37 x 2.95	0.072