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Wire Size Calculator

Voltage:
Cable material:
Number of circuit breakers:

Junction box Appliance, lighting Power consumption, W Cable diameter from the source to the junction box, mm Cable diameter from the junction box to the circuit breaker, mm
Circuit breaker №1
Junction box №1


This online Wire Size Calculator is designed for the convenient and accurate calculation of cable cross-sectional areas based on parameters such as power, voltage, and cable length. It helps determine the optimal cable cross-sectional area for the safe use of electrical appliances in a home or apartment, preventing overheating and ensuring efficient wiring performance.

Main features of the calculator:

  • Calculation of cable cross-sectional area based on power, voltage, and cable length.
  • Selection of cables for single-phase (220V) or three-phase (380V) networks.
  • Choice of cable material (copper or aluminum) for accurate calculations.
  • Consideration of the number of circuit breakers and distribution boxes in the network.
  • Ability to adjust the power of devices for more precise calculations.

To use the Wire Size Calculator, you need to input the power of electrical devices in each room, select the voltage and cable material, and specify the number of circuit breakers and distribution boxes in the home or apartment. After entering all the data, the calculator will provide an accurate calculation of the required cable cross-sectional area, ensuring an optimal choice of materials for the safe operation of the electrical network.

Steps for using the calculator:

  1. Select the network voltage type (220V or 380V).
  2. Specify the cable material (copper or aluminum).
  3. Enter the number of circuit breakers and distribution boxes.
  4. Input the number and power of electrical devices in each room.
  5. Click the "Calculate" button to get the results.

This Wire Size Calculator will help you avoid errors when selecting cables, ensuring the reliable and safe operation of your home's or apartment's electrical network.