Instruction book
1904 0504 83
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I: current in the supply lines at maximum load and nominal voltage
(1): compressors without integrated dryer
(2): compressors with integrated dryer
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are done according to 60364-4-43 electrical installations of buildings, part 4:
protection for safety- section 43: protection against overcurrent. Fuse sizes are calculated in order to
protect the cable against short circuit.
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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).
Installation method B2 according table B.52.1.
Multi-core cable in conduit on a wooden wall
Maximum allowed current in function of the ambient temperature for installation method B2
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4 mm² < 27 A < 23 A < 21 A < 19 A < 16 A
6 mm² < 34 A < 30 A < 27 A < 24 A < 21 A
10 mm² < 46 A < 40 A < 36 A < 33 A < 28 A
16 mm² < 62 A < 54 A < 49 A < 44 A < 38 A
25 mm² < 80 A < 70 A < 63 A < 57 A < 49 A
35 mm² < 99 A < 86 A < 78 A < 70 A < 60 A
50 mm² < 118 A < 103 A < 93 A < 84 A < 72 A
70 mm² < 149 A < 130 A < 118 A < 106 A < 91 A
95 mm² < 179 A < 156 A < 141 A < 127 A < 109 A
120 mm² < 206 A < 179 A < 163 A < 146 A < 126 A
Installation method C according table B.52.1.
Single-core or multi-core cable on a wooden wall
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