Licensed Electrical Contractor NEC General Requirements 4

Question 1

Under NEC 110.16, arc-flash hazard warning labels are required on electrical equipment likely to require examination, adjustment, servicing, or maintenance while energized in which occupancy types?

Accepted Answer

Other than dwelling units

Answer

NEC 110.16 requires arc-flash warning labels on switchboards, panelboards, and similar equipment in other than dwelling units.

Question 2

What is the NEC requirement for securing unused openings in electrical enclosures?

Accepted Answer

They must be effectively closed to provide protection equivalent to the enclosure wall

Answer

NEC 110.12(A) requires unused openings in electrical enclosures to be effectively closed to provide protection equivalent to the wall of the enclosure.

Question 3

According to NEC 110.26(B), the working space width in front of electrical equipment must be:

Accepted Answer

At least 30 inches wide or the width of the equipment, whichever is greater

Answer

NEC 110.26(B) requires the working space width to be at least 30 inches wide or the width of the equipment, whichever is greater.

Question 4

Which NEC article contains the general requirements for electrical installations that apply to all wiring methods?

Accepted Answer

Article 110

Answer

NEC Article 110 contains the general requirements for electrical installations including examination, installation, and connections of equipment.

Question 5

Per NEC 110.31, electrical installations in vaults, rooms, or closets used exclusively for electrical equipment rated over 600V must have:

Accepted Answer

Entrances that are kept locked and accessible only to qualified persons

Answer

NEC 110.31 requires that high-voltage installations in vaults, rooms, or closets be kept locked and accessible only to qualified personnel.

Licensed Electrical Contractor Practice Test

Licensed Electrical Contractor Practice Test

Licensed Electrical Contractor NEC General Requirements 4