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High power arc-flash faults can be characterized as electrical explosions, releasing large amounts of energy in the form of radiant heat, intense light, and high-pressure waves. The temperature of the plasma can reach 20,000 Kelvin. The increase in temperature expands the volume of the air, causing a pressure wave.

7.2.2 (High Resistance Grounding) There is no arc flash hazard, as there is with solidly grounded systems, since the fault current is limited to approximately 5A. Another benefit of high-resistance grounded systems is the limitation of ground fault current to prevent damage to equipment. High values of