Final answer:
Grounding is a process in electrical engineering that fixes a conductor at zero volts by connecting it to the earth. This process is described in section 250.20(C) of the National Electrical Code.
Step-by-step explanation:
The subject of this question is Electrical Engineering.
Grounding in electrical engineering is the process of connecting a conductor to the earth to fix it at zero volts. This is done by connecting the conductor to the earth with a good conductor. In the context of the question you provided, 250.20(C) refers to a specific section in the National Electrical Code (NEC) which deals with the grounding of the grounded conductor in delta-connected service.