Licensed Electrical Contractor Licensed Electrical Contractor NEC General Requirements Questions and Answers 2

Question 1

According to NEC Article 110, what is the minimum headroom required for working spaces about service equipment rated 600 volts or less?

Accepted Answer

6 feet 6 inches

Answer

6 feet

Answer

7 feet

Answer

6 feet 3 inches

Question 2

What does NEC 110.14(A) require regarding the connection of dissimilar metals such as copper and aluminum conductors?

Accepted Answer

They must be identified for the purpose and conditions of use

Answer

They must be joined with solder only

Answer

They can be connected using any listed connector

Answer

They must always use a split-bolt connector

Question 3

Per NEC 110.26(A)(1), what is the minimum depth of clear working space in front of electrical equipment operating at 120 volts to ground with exposed live parts on one side and no live or grounded parts on the other?

Accepted Answer

3 feet

Answer

2 feet 6 inches

Answer

3 feet 6 inches

Answer

4 feet

Question 4

What temperature rating must be used for ampacity selection when conductor terminations are not marked with a temperature rating, per NEC 110.14(C)?

Accepted Answer

60 degrees Celsius for circuits 100 amps or less

Answer

75 degrees Celsius for all circuits

Answer

90 degrees Celsius for all circuits

Answer

60 degrees Celsius for all circuits

Question 5

According to NEC 110.12, electrical equipment must be installed in what manner?

Accepted Answer

In a neat and workmanlike manner

Answer

In a manner approved by the local inspector only

Answer

In accordance with manufacturer instructions only

Answer

In a manner consistent with industry practice

Question 6

Per NEC 110.26(C)(1), for equipment rated 1200 amps or more and over 6 feet wide, how many entrances to the required working space are needed?

Accepted Answer

Two entrances, one at each end of the working space

Answer

One entrance is sufficient

Answer

Three entrances minimum

Answer

Two entrances on the same side