Chapter 9  image

Overcurrent and Undercurrent Protection

“I beg to say that the system of Electric Lighting of the Edison Electric Light Company is absolutely free from any possible danger from fire, even in connection with the most inflammable material.”

Thomas A. Edison, in a letter to the New York Board of Fire Underwriters, May 6, 1881. By the end of that year there were at least 23 electrical fires in New England.

To borrow from Dominique Bouhours, electricity is a good servant but a cruel master. For that reason, it pays to take extra care in building power distribution systems and using electricity. Over the years, measures have been developed ...

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