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Impedance Grounding and Arc Flash
March 3, 2026
A short circuit happens when energized conductors accidentally make contact with each other and/or to ground. When that connection forms, the load and its impedance is bypassed resulting usually resulting in a very high magnitude of current. There are several fault types—three-phase, phase-to-phase, and line-to-ground, but the line-to-ground fault is by far the most common. You’ll often see numbers in the 70–80% of all faults falling into this category. Some say this number is even higher. Why so many line-to-ground
