Calculating Touch Voltages and Electric Shock Risk in Low-Voltage Systems

Calculating Touch Voltages and Electric Shock Risk in Low-Voltage Systems

Performing proper calculations to determine the magnitude and duration of touch voltages in the event of a ground fault is paramount for the protection of persons against electric shock.

The analysis of magnitudes and durations of touch voltages in cable installations can provide electrical professionals with a better understanding of the requirements of Art. 250 of the NEC regarding the protection against electric shock. Such analysis disproves a common misconception held among many electrical professionals that providing an installation with a proper ground electrode is a sufficient condition to eliminate electric shocks in the event of a fault. In reality, even in co

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