Licensed Electrical Contractor Wiring Methods and Materials 3

Question 1

When using liquidtight flexible nonmetallic conduit (LFNC), what is the maximum length permitted for a single run used as a fixed raceway?

Accepted Answer

6 feet

Answer

3 feet

Answer

12 feet

Answer

No limit

Question 2

Which insulation type is rated for use in both wet and dry locations at 75°C?

Accepted Answer

THW

Answer

THHN

Answer

TW

Answer

THWN-2

Question 3

Intermediate metal conduit (IMC) has a wall thickness that is:

Accepted Answer

Thinner than RMC but thicker than EMT

Answer

The same as rigid metal conduit (RMC)

Answer

Thicker than RMC

Answer

The same as EMT

Question 4

What is the maximum ambient temperature rating for Type THHN conductors?

Accepted Answer

90°C

Answer

60°C

Answer

75°C

Answer

105°C

Question 5

When Type NM cable passes through a metal framing member, which protection is required?

Accepted Answer

A steel nail plate at least 1/16 inch thick

Answer

No protection needed if the hole is centered

Answer

A listed bushing or grommet

Answer

Conduit sleeve through the entire member

Question 6

Polyvinyl chloride (PVC) conduit Schedule 40 is NOT permitted to be used:

Accepted Answer

As an equipment grounding conductor path alone

Answer

In wet locations

Answer

Embedded in concrete slabs

Answer

As an exposed outdoor raceway

Question 7

What is the minimum size rigid metal conduit permitted for use as a raceway?

Accepted Answer

1/2 inch trade size

Answer

3/8 inch trade size

Answer

1/4 inch trade size

Answer

3/4 inch trade size