Atlas Copco GA 11+ Instruction Book page 134

Cable sizing according IEC
The tables below indicate the current carrying capacities of cables for 3 commonly used
installation methods, calculated according to standard 60364-5-52 - electrical installations of
buildings part 5 - selection and erection equipment and section 52 - current carrying capacities in
wiring systems.
The allowed currents are valid for PVC insulated cables with three loaded copper conductors
(maximum conductor temperature 70 °C).
Maximum allowed current in function of the ambient temperature for installation method B2
Cable section
4 mm²
6 mm²
10 mm²
16 mm²
25 mm²
35 mm²
50 mm²
70 mm²
95 mm²
120 mm²
Maximum allowed current in function of the ambient temperature for installation method C
Cable section
4 mm²
6 mm²
10 mm²
16 mm²
25 mm²
35 mm²
50 mm²
132
Installation method B2 according table B.52.1.
Multi-core cable in conduit on a wooden wall
Ambient temperature
30 °C 40 °C
< 27 A < 23 A
< 34 A < 30 A
< 46 A < 40 A
< 62 A < 54 A
< 80 A < 70 A
< 99 A < 86 A
< 118 A < 103 A
< 149 A < 130 A
< 179 A < 156 A
< 206 A < 179 A
Installation method C according table B.52.1.
Single-core or multi-core cable on a wooden wall
Ambient temperature
30 °C 40 °C
< 32 A < 28 A
< 41 A < 36 A
< 57 A < 50 A
< 76 A < 66 A
< 96 A < 84 A
< 119 A < 104 A
< 144 A < 125 A
45 °C 50 °C
< 21 A < 19 A
< 27 A < 24 A
< 36 A < 33 A
< 49 A < 44 A
< 63 A < 57 A
< 78 A < 70 A
< 93 A < 84 A
< 118 A < 106 A
< 141 A < 127 A
< 163 A < 146 A
45 °C 50 °C
< 25 A < 23 A
< 32 A < 29 A
< 45 A < 40 A
< 60 A < 54 A
< 76 A < 68 A
< 94 A < 84 A
< 114 A < 102 A
Instruction book
55 °C
< 16 A
< 21 A
< 28 A
< 38 A
< 49 A
< 60 A
< 72 A
< 91 A
< 109 A
< 126 A
55 °C
< 20 A
< 25 A
< 35 A
< 46 A
< 59 A
< 73 A
< 88 A
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