Answer:
D. NESC
Step-by-step explanation:
first of all what's the meaning of NESC:
NESC: National Electrical Safety Code
The National Electrical Safety Code is a United States standard of the safe operation, maintenance, and installation of communication ,
utility system and electric power.
Which includes the following.
1.) power and communication underground lines
2.)power and communication overhead lines,
3.) Power substations
NESC are the ones to tell us the type of installation to use for a particular operation and particular location.
For both safety purposes and to reduce life hazard and community hazard due to elect item.