Busbar Current Calculator


Calculating the current flowing through a busbar is crucial in electrical engineering and design. A busbar serves as a common connection point for multiple electrical circuits, and determining its current helps ensure safe and efficient operation.

How to Use

To use the busbar current calculator, simply input the necessary parameters into the designated fields and click the “Calculate” button. The calculator will then provide you with the calculated current flowing through the busbar.


The formula used to calculate the current flowing through a busbar is:


  • I = Current (in amperes)
  • K = Constant (1.2 for copper, 0.8 for aluminum)
  • W = Width of the busbar (in inches)
  • D = Depth of the busbar (in inches)
  • F = Frequency (in Hertz)
  • L = Length of the busbar (in inches)
  • T = Temperature correction factor (typically 1.0 unless specified)

Example Solve

Let’s say we have a copper busbar with a width of 2 inches, a depth of 0.5 inches, a frequency of 60 Hz, a length of 24 inches, and a temperature correction factor of 1.0.

Using the formula:

I=3 amperes

So, the current flowing through the busbar is 3 amperes.


Q: What is a busbar?

A: A busbar is a metallic strip or bar used to conduct electricity within an electrical distribution system.

Q: Why is it important to calculate busbar current?

A: Calculating busbar current helps ensure that the busbar can safely carry the required electrical load without overheating or causing damage.

Q: What factors affect busbar current?

A: Factors such as material conductivity, dimensions (width and depth), frequency, length, and temperature can influence busbar current.


The busbar current calculator provides a convenient way to determine the current flowing through a busbar, ensuring safe and efficient electrical distribution systems.

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