COMPONENTS / PARAMETER SIZING

Cable Selection

Screen conductor cross-sections using current, length, installation method and ambient temperature.

Input Parameters

Edit the example values. Results update as you type.

Supply Phases

Rated Voltage U

Enter circuit voltage for single phase and line voltage for three phase.

Known Parameters

Operating Current I

Power Factor cosφ

Enter a decimal greater than 0 and no greater than 1.

Conductor Material

The aluminum-conductor table starts at 16 mm².

One-Way Length L

Ambient Air Temperature

Reference table range: 10–60 °C.

Installation Method

Allowable Voltage Drop

Allocate a voltage-drop budget to this section.

Conductor Temperature

The ampacity reference table uses PVC 70 °C conditions.

Reactance per Unit Length

Used for steady-state voltage drop; verify against manufacturer data.

Protection Rated / Setting Current (optional)

Results

Reference Conductor Cross-Section: 6mm²
Operating Current: 30A
Corrected Ampacity: 34A
Voltage Drop: 7.702V
Voltage Drop (%): 2.027%

Formula

Iᴢ = Itable × ktemperature · Iᴢ ≥ max(Iᴮ, Iprotection) · ΔU% = ΔU / U × 100%

Substitution

Iᴢ = 34 × 1 = 34 A ≥ 30 A；ΔU = 2.027% ≤ 3%

Calculation Steps

Determine operating and known protection currents, then look up reference ampacity by material, phases and installation method.
Ambient-temperature correction factor: 1. Voltage drop is estimated at conductor temperature 70 °C and reactance 0.08 Ω/km.
Check corrected ampacity and steady-state voltage drop at each size; select the smallest cross-section meeting both requirements.

Result Explanation

Reference table for a single PVC cable circuit in air. Verify grouping, harmonics, starting, short-circuit thermal withstand and terminal requirements separately.

Conductor Cross-Section	Corrected Ampacity	Voltage Drop	Ampacity / Voltage Drop
1.5 mm²	14.5 A	8.021%	Insufficient / Over Limit
2.5 mm²	19.5 A	4.824%	Insufficient / Over Limit
4 mm²	26 A	3.026%	Insufficient / Over Limit
6 mm²	34 A	2.027%	Pass / Pass
10 mm²	46 A	1.228%	Pass / Pass
16 mm²	61 A	0.778%	Pass / Pass
25 mm²	80 A	0.5083%	Pass / Pass

Product Candidates

Parameter-matched candidates

Parameter sizing is available. No model in the current library meets these conditions.

Formulas and FAQ

Iᴢ = I_table × k_temperature · ΔU% = ΔU / U × 100%

Which installation conditions are covered?

Reference data covers single-circuit PVC cables in air. Grouping, buried cables, harmonics and special installations need separate checks.