GFCI invented

Charles Dalziel, a professor of electrical engineering and computer sciences, invents the ground-fault circuit interrupter, a device now found in virtually every home and building to protect people from electrical shocks caused by defects in appliances or grounding systems.

Dalziel was a pioneer in understanding electric shock in humans, and author of “The Effects of Electric Shock on Man,” which explained the effects of different amounts of electricity on people. The book was based in part on experiments on human subjects, including himself.

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