Copper Busbar Ampacity Table
COMMERCIAL SIZE (IN)
|
COMMERCIAL SIZE (MM)
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THICKNESS (MM)
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WIDTH (MM)
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CROSS-SECTION (MM)
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CROSS-SECTION (IN)
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AMPACITY (A)
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AMPACITY BASIS
|
1/8 x 1
|
3.18 x 25.4
|
3.18
|
25.4
|
80.77
|
0.1252
|
270
|
Based on free air rating, 30°C rise
|
1/4 x 1
|
6.35 x 25.4
|
6.35
|
25.4
|
161.29
|
0.25
|
470
|
Based on free air rating, 30°C rise
|
1/4 x 2
|
6.35 x 50.8
|
6.35
|
50.8
|
322.58
|
0.5
|
840
|
Based on free air rating, 30°C rise
|
3/8 x 2
|
9.53 x 50.8
|
9.53
|
50.8
|
483.87
|
0.75
|
1100
|
Based on free air rating, 30°C rise
|
1/2 x 4
|
12.7 x 101.60
|
12.70
|
101.60
|
1292.32
|
2.0031
|
2000
|
Based on free air rating, 30°C rise
|
