FREE E2 General Requirements and NEC Questions and Answers

Question 1

According to NEC Article 110, what is the minimum required width of the working space in front of a commercial switchboard that is 48 inches wide?

Accepted Answer

The width of the equipment or 30 inches, whichever is greater

Answer

30 inches

Answer

36 inches

Answer

48 inches

Question 2

An electrical inspector is examining a new installation in a commercial building. Which of the following defines the term 'Approved' as used in the NEC?

Accepted Answer

Acceptable to the authority having jurisdiction (AHJ)

Answer

Listed by a qualified electrical testing laboratory

Answer

Meeting the manufacturer's specifications

Answer

In compliance with all local building codes

Question 3

A commercial service equipment rated 1200A or more is being installed. Which of the following markings is specifically required by NEC 110.24 to be field-applied to this equipment?

Accepted Answer

The maximum available fault current and the date of calculation

Answer

The name of the installing contractor

Answer

The arc-flash hazard boundary

Answer

The date of the last maintenance check

Question 4

During an inspection of a commercial office space, you find a service disconnecting means installed inside the building. According to NEC 230.70(A)(1), the disconnect must be located:

Accepted Answer

At a readily accessible location nearest the point of entrance of the service conductors

Answer

In a locked electrical closet

Answer

Within 10 feet of the main entrance

Answer

On the same wall as the electrical panel it serves

Question 5

Which of the following must be evaluated when judging the suitability of electrical equipment for a commercial installation, according to NEC 110.3(A)?

Accepted Answer

Mechanical strength and durability

Answer

The cost of the equipment

Answer

The aesthetic appearance of the enclosure

Answer

The country of origin of the components

Question 6

An inspector is verifying the working space around a 480V motor control center in a commercial facility. The equipment has exposed live parts on one side and a grounded concrete wall on the other. What is the minimum required depth of working space according to NEC Table 110.26(A)(1)?

Accepted Answer

3 feet 6 inches

Answer

3 feet

Answer

4 feet

Answer

5 feet