When he arrived, he saw the source of the fault. A loose lug on the incoming phase supply had vibrated loose during the storm and swung down, touching the metal casing of the machine. The casing was now live.
Where:
S=I2⋅tkcap S equals the fraction with numerator the square root of cap I squared center dot t end-root and denominator k end-fraction : Minimum cross-sectional area of the conductor in mm2m m squared : Value (in Amperes) of the prospective fault current. : Disconnection time of the protective device in seconds. earth cable size calculation
