Engineering Utility

Cable Sizing Calculator

Calculate the minimum cable cross-section based on load current, voltage drop, installation method, and ambient temperature. Results follow IEC 60364-5-52 and IEC 60228 standards.

Input Parameters

" hx-swap="innerHTML" hx-include="#cable-calc-form" hx-indicator="#calc-indicator" accept-charset="UTF-8" >

System Parameters

System Type *

System Voltage (V) *

Power Factor

Load & Circuit

Load Current (A) *

Full-load design current (Ib)

Cable Length (m) *

One-way cable run length

Max Voltage Drop (%)

Ambient Temperature (°C)

Cable Properties

Conductor Material

Insulation Type

Installation Method

Calculating...

Results will appear here

Fill in the parameters on the left and click Calculate Cable Size to get your recommendation.

Quick Reference

Section	Cu XLPE (A)	Al XLPE (A)
1.5 mm²	18	14
2.5 mm²	25	19
4 mm²	34	26
6 mm²	43	33
10 mm²	60	46
16 mm²	80	61
25 mm²	101	78
35 mm²	122	94
50 mm²	144	110
70 mm²	184	141
95 mm²	223	171
120 mm²	259	199
150 mm²	295	227
185 mm²	341	262
240 mm²	403	309

IEC 60364-5-52 Table B.52.4 · Method B2 · 3-core · 30°C

Standard Basis

IEC 60364-5-52 · IEC 60228 · BS 7671 (18th Ed.)

Calculation Method

Current capacity + voltage drop check with temperature derating

Need a Custom Spec?

Our engineers can assist with complex installations -- contact us.