This paper provides information on the following topics: 1) Description of the key functions of the overcurrent protective devices (OCPDs) used in low-voltage applications for meeting selective coordination requirements per the latest edition of the NEC [18] 2) Discussion of selective coordination application information provided by manufacturers and implications for system design 3) The importance of including both phase currents, as well as ground-fault currents, for selective coordination 4) The role of the system design engineer and the necessary interaction with applicable authorities having jurisdiction (AHJ) 5) An overview of considerations for designing selectively coordinated systems 6) Background information illustrating why overlapping of time current characteristic curves does not equate to a loss of selective coordination