Fault Current

[mark]

What is the formula for calculating the available fault current at a specific point on an AC electrical system.

 

[mikeackley]

Re: Fault Current

Go here mark - there are a number of fault current calculators on Mike Holt's website, freebies too.
http://www.mikeholt.com/freestuff.php?id=freegeneral

 

[dereckbc]

Re: Fault Current

It is a process of steps:

1. Obtain availible fault current from utility.
2. Determine KVA and impedance of transformer.
3. Type of conduit and conductor.
4. Length of circuit
5. Number of phases involved.
6. Selct phase and conductor size.
7. Select neutral size.

Once you obtain all the information you plug into worksheet.

 

[charlie]

Re: Fault Current

You can also find fault current calculations at Bussman's web site.