Beware of Simplistic Fault Current Calculations

Specifying and
installing underrated equipment can
undermine your power distribution design

Fault current calculations are a critical piece of the electrical design/engineering puzzle for electrical distribution systems in commercial and industrial installations. A fault current calculation determines the maximum available current that will be available at a given node, or location, in the system. Once the fault currents have been calculated, you can then select overcurrent protection equipment,

Discuss this Article 2

Anonymous (not verified)
on Jun 29, 2012

My distribution is 3nos of 2000kva transformer connected with a common PCC&max capacity of the motor is 160 kw .what is the fault current level to be considered for the design .

Jeremy Kuipers (not verified)
on Oct 15, 2012

I need to calculate Fault current at my service gear. i have 42k secondary AIC at the transformer according to the power company. i am parraleling 350AL each run is 60ft. its a single phase 120/240v installation. Can you help?

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