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NEC 2023 · CH.9 TBL.8
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Metric Cable Sizes (mm²)
Every common metric size with its Method C rating and a representative maximum run.
Size
Rating (A)
mV/A/m
~Max run @ 80% load, 230 V, 5%
1.5 mm²
20
30.0
24 m
2.5 mm²
27
18.0
30 m
4 mm²
37
11.2
35 m
6 mm²
47
7.5
41 m
10 mm²
64
4.5
50 m
16 mm²
85
2.8
60 m
25 mm²
112
1.8
71 m
35 mm²
138
1.3
81 m
50 mm²
168
0.9
95 m
70 mm²
213
0.6
105 m
95 mm²
258
0.5
118 m
120 mm²
299
0.4
128 m
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Murugan Vellaichamy
· Every calculation verified against NEC Chapter 9 Table 8 & Table 310.16 published values · Informational reference — not engineering advice