The purpose of the National Electrical Code (NEC) is to:
A.
Standardize electrical product manufacturing.
B.
Regulate power usage throughout the United States.
C.
Standee electrical voltage throughout the United States.
D.
Set safety standards for electricaldesign construction and maintenance.
Explanation:
The most widely adopted element of a building code in the United
States and the world, NFPA 70, National Electrical Code (NEC) is the benchmark
for safe and efficient electrical installations.
Source: http://www.nfpa.org/nec/thenec/index.asp