SWG to Current (amperage) Chart – Transformer Wire Amperage Table

SWG to Current (amperage) Sizing Chart:

Below you can find the various size of the SWG to amperage conversion. The chart is applicable for transformer winding grade of Enamelled Copper Wire. In this, the highlighted copper wire size is used for transformer winding.

Botton video explanation is available for calculating transformer wire sizing.

SWG MM SQMM Amperage (Amps)
7/0 12.7 126.6769 354.7
6/0 11.786 109.0921 305.5
5/0 10.973 94.5638 264.8
4/0 10.16 81.0732 227.0
3/0 9.449 70.1202 196.3
2/0 8.839 61.3643 171.8
8.23 53.1921 148.9
1 7.62 45.6037 127.7
2 7.01 38.5989 108.1
3 6.401 32.178 90.1
4 5.893 27.273 76.4
5 5.385 22.7735 63.8
6 4.877 18.6793 52.3
7 4.47 15.6958 44.2
8 4.064 12.9717 33.3
9 3.658 10.5071 26.5
10 3.251 8.3019 21.2
11 2.946 6.8183 16.6
12 2.642 5.4805 13.5
13 2.337 4.2888 10.5
14 2.032 3.2429 8.3
15 1.829 2.6268 6.6
16 1.626 2.0755 5.2
17 1.422 1.589 4.1
18 1.219 1.1675 3.2
19 1.016 0.8107 2.6
20 0.914 0.6567 2
21 0.813 0.5189 1.6
22 0.711 0.3973 1.2
23 0.61 0.2919 1
24 0.559 0.2452 0.8
25 0.508 0.2027 0.6
26 0.4572 0.1642 0.5
27 0.4166 0.1363 0.4
28 0.3759 0.111 0.3
29 0.3454 0.0937 0.29
30 0.315 0.0779 0.22
31 0.2946 0.0682 0.21
32 0.2743 0.0591 0.18
33 0.254 0.0507 0.16
34 0.2337 0.0429 0.13
35 0.2134 0.0358 0.11
36 0.193 0.0293 0.09
37 0.1727 0.0234 0.07
38 0.1524 0.0182 0.06
39 0.1321 0.0137 0.04
40 0.1219 0.0117 0.04
41 0.1118 0.0098 0.03
42 0.1016 0.0081 0.03
43 0.0914 0.0066 0.02
44 0.0813 0.0052 0.02
45 0.0711 0.004 0.01
46 0.061 0.0029 0.01
47 0.0508 0.002 0.01
48 0.0406 0.0013 0.00
49 0.0305 0.0007 0.00
50 0.0254 0.0005 0.00
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What is Wire gauge for transformer, how to calculate wire gauge for transformer?

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