Cable Cross-Section Calculator
Choose the right cable size for safe electrical installations! This calculator helps electricians and PV installers determine the minimum required cable cross-section based on current load, voltage, cable length, and acceptable voltage drop.
How to use:
- Select your voltage type (230V AC or 400V 3-phase)
- Enter the current load in Amperes (or power in Watts)
- Input the cable length
- Choose cable material (Copper or Aluminum)
- Get instant recommendations with standard cross-sections
Or calculate from power:
One-way distance
Standard: 3% (VDE norm)
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Understanding Cable Cross-Sections:
Standard Cross-Sections (mm²):
- 1.5 mm²: Lighting circuits, low-power appliances
- 2.5 mm²: Power outlets, standard circuits
- 4 mm²: Kitchen appliances, electric stoves
- 6 mm²: High-power appliances, short distances
- 10 mm²: Heat pumps, powerful machinery
- 16 mm²: Main distribution, long distances
- 25 mm²+: Industrial applications, very high loads
Safety Considerations:
- VDE Compliance: All electrical work must meet VDE standards
- Professional Installation: Only qualified electricians should perform installations
- Voltage Drop: Typically max 3% for power circuits, 1% for sensitive equipment
- Current Carrying Capacity: Consider installation method and ambient temperature
- Protection: Ensure proper fuse/circuit breaker sizing
Applications:
- Electricians: Residential and commercial wiring projects
- PV Installers: Solar panel DC cable sizing
- Industrial Technicians: Machinery and equipment connections
- Building Services: HVAC and pump installations