Avoiding confusion with Class 2 and 3 remote-control, signaling, and power-limited circuits
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. Remember, these circuits are defined by their power sources, which must be one of the following: A listed Class 2 or Class 3 transformer. A listed Class 2 or Class 3 power supply. Equipment listed as a Class
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