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LV Cable Sizer

IEC 60364-5-52 · BS 7671:2018 · NEC 2023 (NFPA 70)

Size low-voltage power cables (≤1 kV) to IEC, BS 7671 or NEC. Handles continuous loads, temperature correction, grouping derating, voltage drop, OCPD selection, and protective conductor sizing.

Standard
IEC 60364-5-52
Voltage LevelLV≤1 kV
Tables B.52.4–B.52.9 — Ampacity (Methods A–G)• B.52.14/15 — Temperature Correction• B.52.17/18 — Grouping / Bunching• B.52.16 — Soil Resistivity• B.52.19 — Depth of Burial• IEC 60364-4-43 — OCPD Coordination• IEC 60364-5-54 — PE Conductor• Clause 525 — Voltage Drop
Load Configuration

Used for voltage drop calculation. 0.85 typical; 1.0 for resistive.

Cable Properties

Reference ambient: 30 °C air. Most common surface mounting method.

Auto-set from phase selection. Neutral not counted if not loaded.

Environment & Circuit

Reference: 30 °C ambient

No grouping derating applied

IEC recommends ≤4%

Advanced Options

Enter load parameters

Results will appear here after calculation

Based on IEC 60364-5-52:2009 (Electrical installations of buildings — Wiring systems). Always verify results with a qualified electrical engineer and the applicable national standard.

For reference use only — not a substitute for professional engineering judgment.