Licensed Electrical Contractor NEC General Requirements 2

Question 1

According to NEC Article 110, what is the minimum headroom required for electrical equipment rated 1200A or more and over 6 feet wide in a dedicated electrical space?

Accepted Answer

6 feet

Answer

5 feet

Answer

6.5 feet

Answer

8 feet

Question 2

Under the NEC, which article governs the requirements for conductors entering enclosures to prevent abrasion?

Accepted Answer

Article 300

Answer

Article 100

Answer

Article 110

Answer

Article 312

Question 3

What does NEC 110.14 primarily address?

Accepted Answer

Electrical connections and terminals

Answer

Conductor ampacity ratings

Answer

Grounding electrode requirements

Answer

Circuit breaker interrupting ratings

Question 4

Per NEC 110.3(B), installed electrical equipment must be used:

Accepted Answer

In accordance with its listing and labeling instructions

Answer

At any voltage the installer deems appropriate

Answer

Only with copper conductors unless aluminum is specified

Answer

With GFCI protection in all locations

Question 5

Which NEC section requires that interrupting ratings of overcurrent devices be sufficient for the available fault current?

Accepted Answer

110.9

Answer

110.10

Answer

110.11

Answer

110.12

Question 6

According to NEC 110.26(C)(2), what is required for electrical equipment rooms with a door that opens toward the working space?

Accepted Answer

The door must be equipped with panic hardware or a listed exit device

Answer

The door must be at least 36 inches wide

Answer

The door must open to provide a minimum 90-degree swing

Answer

The door must have a minimum 7-foot height

Question 7

What NEC requirement applies to conductors of different systems occupying the same raceway?

Accepted Answer

All conductors must have insulation rated for the highest voltage present

Answer

They must be the same wire gauge

Answer

They must be color-coded with the same scheme

Answer

Conductors over 600V and under 600V may never share a raceway