Contact with or exposure to electricity continues to be one of the leading causes of workplace fatalities and injuries in the United States, according to Electrical Safety Foundation International.

The effects of an electric shock vary depending on its source and severity. For example, shocks from light switches may be mild, while contact with industrial power sources can cause severe effects.

An electrical breakdown snarled traffic on the Northeast rail corridor for hours, delaying trains arriving at New York’s Penn Station from Philadelphia and Boston. Damage to overhead wires halted a ...