Enter the sheath voltage, sheath current, and sheath impedance into the calculator to determine the missing variable.

Cable Sheath Voltage Calculator

Basic (V=IZ)
Induced Voltage (Single-point)
Circulating Current (Both-ends)

Enter any 2 values to calculate the missing variable


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Cable Sheath Voltage Formula

The following formula is used to calculate the sheath voltage, current, or impedance for a cable.

V = I * Z

Variables:

  • V is the sheath voltage
  • I is the sheath current
  • Z is the sheath impedance

To calculate the sheath voltage, multiply the sheath current by the sheath impedance. This formula can also be rearranged to solve for the current or impedance if the other two variables are known.

What is Cable Sheath Voltage?

Cable sheath voltage refers to the voltage that exists on the outer conductive layer (sheath) of a cable. This voltage can be caused by various factors, including electromagnetic induction, capacitive coupling, or direct electrical connection. The sheath voltage is an important parameter in the design and operation of power and communication cables, as it can affect the overall performance and safety of the cable system. Proper management of sheath voltage is essential to prevent insulation breakdown, minimize electromagnetic interference, and ensure the longevity of the cable.

How to Calculate Cable Sheath Voltage?

The following steps outline how to calculate the Cable Sheath Voltage.


  1. First, determine the sheath current (I).
  2. Next, determine the sheath impedance (Z).
  3. Next, calculate the sheath voltage using the formula V = I * Z.
  4. Finally, calculate the Cable Sheath Voltage.
  5. After inserting the values and calculating the result, check your answer with the calculator above.

Example Problem : 

Use the following variables as an example problem to test your knowledge.

Sheath Current (I) = 10 A

Sheath Impedance (Z) = 5 Ω