Cable Sizing Calculator
Power Cable Sizing Tool
Power cable sizing calculator — considers load current, cable length, installation method, ambient temperature to auto suggest cable size. Includes voltage drop check, derating factors, and IEC 60364-5-52 compliance.
1,187 downloads
Excel
Completely Free — No Registration Required
How to Use
Follow these simple steps to get started
Enter load current (Amp) and cable length (m)
Select installation method (Tray, Conduit, Direct Buried)
Enter ambient temperature and grouping factor
View recommended cable size and voltage drop %
Derating factors are applied automatically
Tool Preview
Screenshot will be shown here
Who Needs This
Frequently Asked Questions
According to BNBC 2020: Lighting = 3%, Power = 5%, Combined = 4%.
Ambient temperature, grouping, installation method, soil thermal resistivity — all are considered.
Both are supported. Copper is 1.68x more conductive — so smaller size is needed.
Motor cable must consider starting current (6-8x). A special factor is applied.
Yes, PVC (70°C) and XLPE (90°C) — temperature rating differs.
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