Fault Current Calculations

[rdrigg]

When determining "C" values of conductors how is that changed when you use conductors in parallel?

 

[charlie b]

Sorry, but I don't know what you mean by "C values."

 

[don_resqcapt19]

Look at page two of this document.

 

[zog]

For parallel runs, multiply C values by the number of conductors per phase.

 

[jghrist]

For parallel runs, multiply C values by the number of conductors per phase.

Which is done by the factor "n" in the Bussman equation.

n = Number of conductors per phase (adjusts C value for
parallel runs)

 

[rdrigg]

Thank you!

 

[zog]

Oops, you are right, guess I should have looked at that link. The "n" isnt in any other of my references for the point to point method, guess Busmann added that in there.

 

[davidr43229]

The C value is a conservative value, instead of using the X / R ratio. Be careful when determining if you have magnetic or non magnetic conduits.
http://www.cooperbussmann.com/7/FreeSoftware.html#Short-Circuit Current Calculator
Just my $.02