Calculate current-carrying capacity I_z and voltage drop ΔU for electrical cables. EN 60364-5-52 tables, installation methods A1–D, Cu and Al conductors.
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Sizing Results
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A
Reference I_z (A)
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A
Corrected I_z (A)
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A
Design Current I_b (A)
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%
Voltage Drop ΔU (%)
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Utilisation I_b / I_z
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mm²
Recommended Size
Voltage drop— / 3%
Combined factor
Factor
Value
Effect
Temperature factor f_t
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—
Grouping factor f_g
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—
Combined factor
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f_t × f_g
Recommendations
I_z reference values are for PVC-insulated copper cables at 70°C conductor temp. Corrected: I_z_corrected = I_z_base × f_t × f_g. Voltage drop: single-phase ΔU = 2·ρ·L·I / S; three-phase ΔU = √3·ρ·L·I / S (ρ_70 = 0.0188 Ω·mm²/m for Cu; 0.0310 for Al).