Arc-blast is described as a violent electrical condition that causes molten metal to be thrown through the air.

Arc-blast is described as a violent electrical condition that causes molten metal to be thrown through the air.

• A. Arc-blast
• B. Arc-flash
• C. Short circuit
• D. Ground fault

Answer: (A)

Arc-blast refers to the explosive mechanical energy produced by an arcing fault, including the rapid expansion of plasma and metal vapor that can blow apart equipment and throw molten metal into the air. The description of molten metal being ejected is the key indicator of this mechanical blast effect. Arc-flash, by contrast, is the intense thermal energy and light from an arc that can cause burns, but it does not typically involve ejecting molten metal. Short circuit and ground fault describe fault conditions related to current paths rather than the violent mechanical ejecta described here.

Arc-blast refers to the explosive mechanical energy produced by an arcing fault, including the rapid expansion of plasma and metal vapor that can blow apart equipment and throw molten metal into the air. The description of molten metal being ejected is the key indicator of this mechanical blast effect. Arc-flash, by contrast, is the intense thermal energy and light from an arc that can cause burns, but it does not typically involve ejecting molten metal. Short circuit and ground fault describe fault conditions related to current paths rather than the violent mechanical ejecta described here.