This standard specifies ratings and service conditions, environmental performance, and testing requirements for devices with communications functions used with electric power apparatus. Environmental and electromagnetic compatibility (EMC) immunity levels and type-tests simulating environments associated with electric apparatus are described. Acceptance criteria for evaluating device functionality are provided. For devices used with electric power apparatus and with communications ports (optical fiber port, copper wired port [e.g., Ethernet, power over Ethernet, serial, carrier current communications interface], antenna port, etc.), where the device does not perform protection or control functions, testing of the communications functions is covered by IEEE Std 1613. Where the device performs protection or control functions and has communications ports, tests for all communications functions are covered by the IEEE C37.90 family of standards.