In last month's “Code Basics” article, starting on page 56 of the September issue, we spent most of our time discussing Class 1 circuits. Now, it's time to switch gears and focus on Class 2 and 3.
Two different technologies protect against two different types of hazard. Ground fault circuit interrupter (GFCI) devices protect people from shock by opening a circuit at a low threshold of leakage ...
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