Examples of Utilities as Noted in the NEC

Electric utilities may include entities that install, operate, and maintain _____.

a) communications systems (telephone, CATV, Internet, satellite, or data services)
b) electric supply systems (generation, transmission, or distribution systems)
c) local area network wiring on the premises
d) a or b

See answer and applicable Code reference

The correct answer is: d) communications systems or electric supply systems

Section 90.2 of the 2011 NEC outlines the Scope of the Code. An Informational Note in 90.2(B)(5) states, "Examples of utilities may include those entities that are typically designated or recognized by governmental law or regulation by public service/utility commissions and that install, operate, and maintain electric supply (such as generation, transmission, or distribution systems) or communications systems (such as telephone, CATV, Internet, satellite, or data services)."