Cable Cross-Section Calculation - Professional Guide 2026

⚡ What is Cable Cross-Section?

Cable cross-section is a measure of the thickness of an electrical cable (mm²). Choosing the correct cross-section is critical for safety and efficiency .

📏 Standard Cable Cross-Sections

1.5 mm²: Lighting, power socket (max 10A)
2.5 mm²: Socket, air conditioner (max 16A)
4 mm²: Air conditioner, oven (max 25A)
6 mm²: Industrial (max 32A)
10 mm²: Main line (max 50A)

📊 Cable Cross-Section Calculation

Method 1: Based on Amperes

Formula: Ampere = Watt / Voltage

Example:
- 2000W device
- 220V mains
- Amperage = 2000 / 220 = 9.09A
- Required cable: 1.5 mm²

Method 2: Based on Watts

1.5 mm²: Max 2200W
2.5 mm²: Max 3500W
4 mm²: Max 5500W
6 mm²: Max 7000W

💡 Cable Cross-Section for Lighting

LED Spot Lighting

10 spot lights (150W): 1.5 mm²
20 spots (300W): 1.5 mm²
30 spot lights (450W): 2.5 mm²
50 spot (750W): 2.5 mm²

LED Panel

10 panels (360W): 1.5 mm²
20 panels (720W): 2.5 mm²
30 panels (1080W): 2.5 mm²

Industrial LED

10 UFO LEDs (2000W): 2.5 mm²
20 UFO LEDs (4000W): 4 mm²
30 UFO LEDs (6000W): 6 mm²

📏 Distance Effect

Increase the cross-section over long distances!

0-30 meters: Standard cross-section
30-50 meters: Increase by one level.
50+ meters: Increase by 2 levels

Example:
- 20 spots, 15 meters: 1.5 mm²
- 20 spots, 40 meters: 2.5 mm²
- 20 spots, 60 meters: 4 mm²

🔌 Cable Types

NYA (Single Core)

Application: In-pipe, fixed installation.
Color: Phase (brown), Neutral (blue), Earth (yellow-green)

NYM (with case)

Application: Indoor, surface mounted.
Feature: More durable

NYY (Underground)

Usage: Outdoor, underground
Feature: Waterproof

⚠️ Safety Rules

• 🔒 Never use thin cables - Fire risk!
• ⚡ Always ensure proper grounding.
• 🔧 Work with a professional electrician.
• 🚨 Use insurance

💰 Cable Prices 2026

NYA 1.5 mm²: 5-8 TL/m
NYA 2.5 mm²: 8-12 TL/m
NYM 3x1.5: 15-20 TL/m
NYY 3x2.5: 25-35 TL/m

🎯 Result

Choosing the correct cable cross-section ensures safe and efficient electrical installations .

📦 Free Consultation: Calculate cable cross-section for your project!