Calculator #001 IEC 60364-5-52 (LV) IEC 60502-2 (MV) up to 33 kV Multi-feeder

Voltage Drop Calculator — LV & MV up to 33 kV

Multi-feeder, multi-segment voltage drop per IEC 60364-5-52 Annex G (LV) and IEC 60502-2 / IEC 60287 (MV, up to 33 kV inclusive). Segments can mix single-phase, three-phase, and DC on the same bus. All computation runs in your browser — no data leaves the page.

Developed by the ieccalc.com engineering team

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Project settings (applied to all feeders)

Region preset

System

Nominal voltage U (IEC 60038 scale)

Custom U, V

Frequency, Hz

Allowable limit ΔU%

Ambient temperature θ_a, °C

Conductor operating temp θ_op, °C

PRO — unlimited project size

The free tier carries the whole calculation — every standard, every check and the full .docx report — for up to 3 feeders in one project. PRO removes that limit so a complete installation fits into a single file. An admin invitation unlocks it for your account.

Glossary & abbreviations

Input data schema is compatible with Calculator #002 (short-circuit IEC 60909): identical field names for U, freq, system, region, segments/elements[].L, .series, .S, .R_km, .X_km, .material, .n_parallel, .theta_ref_R. Future calculators in the series will follow the same contract.

Built-in validation tests

#	Case	Method	Expected ΔU%	Computed	Status

Reference values cross-checked with Schneider Electric Electrical Installation Guide (chapter G), ABB Electrical Installation Handbook, and IEC 60228 α values.