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class 2 and class 3 circuits class 2 and class 3 circuits require overcurrent protection class 2 and class 3 circuit power limitations are established by nec ___ class 1 class 2 and class 3 circuits difference between class 2 and class 3 circuits class 2 vs class 3 circuits what code article generally covers class 2 and class 3 circuits what is the difference between class 1 class 2 and class 3 circuits which article provides information on the installation of class 2 and class 3 circuits part of article 725 covers the requirements for class 2 and class 3 circuits
