Busbar Current Capacity Calculator
Description
This tool calculates the maximum continuous current-carrying capacity of mineral-insulated bare conductors rated at 750V, based on Tables B.52.6 to B.52.9 of IEC 60364-5-52. It supports copper or aluminum conductors under various installation conditions and environmental corrections.
Input Parameters
- Method of Installation: According to IEC 60364-5-52 (Table A.52.3), such as open air, buried, in conduit, etc. Note: Not all methods are recognized in every country's regulations.
- Conductor Material: Copper (Cu) or Aluminum (Al), affecting resistivity and thermal performance
- Type:
- PVC-covered or bare exposed to touch (metallic sheath temperature: 70°C)
- Bare not exposed to touch and not in contact with combustible material (metallic sheath temperature: 105°C)
- Wire Size (mm²): Cross-sectional area of the conductor
- Phase Conductors in Parallel: Identical conductors can be connected in parallel; maximum permissible current is the sum of individual core ratings
- Ambient Temperature: Temperature of surrounding medium when unloaded:
- Air temperature correction factor: IEC 60364-5-52 Table B.52.14
- Ground temperature correction factor: IEC 60364-5-52 Table B.52.15
- Soil thermal resistivity correction: IEC 60364-5-52 Table B.52.16
- Circuits in the Same Conduit: Number of circuits inside one duct powering different loads (e.g., 2 lines for 2 motors). Reduction factors from IEC 60364-5-52 Table B.52.17 apply.
Output Results
- Maximum continuous current (A)
- Corrected value for ambient temperature
- Reduction factor for multiple circuits
- Reference Standards: IEC 60364-5-52, Tables B.52.6–B.52.9
Designed for electrical engineers and designers to select appropriate bare conductors for high-voltage or industrial power distribution systems, ensuring safe and reliable operation.
Give a tip and encourage the author!
Recommended
