NEC Fault-Current Calculator NEC Fault-Current Calculator Determine the available fault current using NEC-compliant formulas. Add the utility inputs Voltage 208 V 240 V 480 V Phase Single Phase Three Phase Utility Fault Current (A) 100 kA 65 kA 42 kA 22 kA 10 kA Begin assembling your system by adding the electrical components: Add the utility transformer, switchboard, or panel name as the first piece of electrical equipment. Series Components + Add Component Component 1 Remove Bus Name Select Conductor/Transformer Conductor Transformer Length (ft) Size 14 12 10 8 6 4 3 2 1 1/0 2/0 3/0 4/0 250 300 350 400 500 600 750 1000 Parallel Runs Conductor Type Copper Aluminum Conduit Type PVC EMT MC SER Primary Voltage (L–L) Secondary Voltage (L–L) kVA % Impedance Calculate Fault Currents How useful was this post? Click on a star to rate it! Submit Rating Average rating 5 / 5. Vote count: 2 No votes so far! Be the first to rate this post.
