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Cable Ampacity Calculator

Calculate the allowable current-carrying capacity of low-voltage cables based on conductor material, cross-section, ambient temperature, and installation method. Results comply with IEC 60364-5-52 and GB/T 16895 standards.

⚙️ Input Parameters
IEC 60364-5-52 Method E: cables on perforated trays
30°C
▶ Advanced Options
Grouping reduces ampacity due to mutual heating
80%
⚡

Enter parameters and click Calculate to see results

Input Summary
Material—
Section—
Insulation—
Install—
Temp—
Standards Basis
  • IEC 60364-5-52: Wiring systems selection
  • IEC 60228: Conductors of insulated cables
  • GB/T 16895.6: Low-voltage installations
  • NEC 310.15: Ampacity tables (US reference)
Boundary Conditions
  • Results assume single-circuit operation unless grouping is specified
  • Temperature correction applies IEC 60364-5-52 Table B.52.14
  • For buried cables, soil thermal resistivity assumed 2.5 K·m/W
  • Always verify with local electrical code and project specifications
Warnings
  • ⚠ Note Actual load must not exceed recommended maximum current
  • ✕ Critical Bundled cables require additional derating — do not skip grouping factor

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