🧱 Cable Sizing Tool

Easily determine the correct cable size for your electrical installation using this simple and accurate Cable Sizing Tool. It helps engineers, electricians, and students ensure safety, efficiency, and compliance with voltage drop limits.

Calculate cable size Instantly

Enter Load Current (A):
Input the current drawn by your electrical equipment or circuit.
Enter Supply Voltage (V):
Provide the rated voltage of your system (e.g., 230 V for single-phase or 415 V for three-phase).
Enter Cable Length (m):
Specify the one-way distance between the power source and the load.
Select System Type:
Choose whether your system is Single Phase or Three Phase.
Select Conductor Material:
Pick Copper or Aluminum depending on your project.
Click “Calculate Cable Size”:
Instantly view the recommended cable size (mm²), voltage drop (V and %), and system efficiency (%).

🧭 How to Use the Cable Sizing Tool

FAQ

Q1. What factors affect cable size selection?

Cable size depends on load current, voltage level, cable length, material resistivity, and permissible voltage drop.

Q2. Why limit voltage drop to 3%?

A 3% voltage drop is widely accepted in electrical standards to ensure efficiency and prevent overheating.

Q3. Can this calculator be used for industrial systems?

Yes, it provides an approximate reference for both residential and industrial applications.