Ohm's Law Calculator for High Voltage Testing

Ohm's Law describes the electrical behavior of conductors and insulation so you'll often see high voltage test specifications that list a test voltage and either a maximum current or a minimum resistance. You can convert test specifications from voltage/current to voltage/resistance using Ohm's Law. This calculator is designed to help you convert your test specifications from one form to another.

To use the calculator:
    1) Enter your test voltage,
    2) Enter either the maximum leakage current or the minimum insulation resistance,
    3) Click "Calculate",
    4) The third value will be displayed in the Ohm's Law Calculation Result section.

   

Voltage (V)  V = I x R


Current (I)  I = V / R


Resistance (R)  R = V / I


Ohm's Law Calculation Result:
    ____ will cause
    ____ to flow through
    ____
    (The power dissapated in the resistance is ____)

In an insulation resistance test: At ___ the resistance needs to be higher than ___ or the test will fail because the current will be larger than ___.

 

Calculations you've done so far:


 

Note: This calculator can generate combinations of voltage and current that are not practical in normal cable testing applications. If the calculation shows voltages or currents that are out of the specified range for a cable tester then you know the tester doesn't measure the resistance with the current or voltage you've selected. Don't Panic.