Charles R. Miller, owner of Lighthouse Educational Services, teaches classes and seminars on the electrical industry. He is the author of “Illustrated Guide to the National Electrical Code” and NFPA’s “Electrical Reference.” He can be reached at 615....
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The overcurrent protection (OCP) for Class 2 and 3 circuits is inherent because it is equipped in their power supply. Separate OCP when used for these circuits only applies to the supply side of the power source. Section 725.51 requires such protection when installed on...Read the Article