In Bringing Us Electricity, Westinghouse Rejected the Precautionary Principle
(p. 180) The defensive position that Westinghouse found himself in is illustrated by the way he contradicted himself as he tried to defend overhead wires. The wires that were supposedly safe were also the same wires that he had to admit, yes, posed dangers, yes, but dangers of various kinds had to be accepted throughout the modern city. Westinghouse said, "If all things involving the use of power were to be prohibited because of the danger to life, then the cable cars, which have already killed and maimed a number of people, would have to be abolished." Say good-bye to trains, too, he added, because of accidents at road crossings.
Stross, Randall E. The Wizard of Menlo Park: How Thomas Alva Edison Invented the Modern World. New York: Crown Publishers, 2007.