EETC Conduit & Raceway Systems

Question 1

According to NEC Chapter 9, Table 1, what is the maximum percentage of conduit cross-sectional area that conductors may occupy when three or more conductors are installed?

Accepted Answer

40%

Answer

31%

Answer

53%

Answer

60%

Question 2

Which conduit type has the thinnest wall and is NOT suitable for direct burial in soil without additional protection?

Accepted Answer

Electrical Metallic Tubing (EMT)

Answer

Rigid Metal Conduit (RMC)

Answer

Intermediate Metal Conduit (IMC)

Answer

Rigid PVC Schedule 80

Question 3

What is the maximum total degrees of bends permitted in a single conduit run between pull points according to the NEC?

Accepted Answer

360°

Answer

180°

Answer

270°

Answer

450°

Question 4

Liquidtight Flexible Metal Conduit (LFMC) is most commonly specified for:

Accepted Answer

Final connections to motors and other vibrating equipment

Answer

Long straight runs in industrial facilities

Answer

Underground service entrance conductors

Answer

Surface wiring in finished commercial spaces

Question 5

Which type of conduit is specifically listed and approved for direct burial in soil and concrete encasement?

Accepted Answer

Rigid PVC Conduit (Schedule 40)

Answer

Electrical Metallic Tubing (EMT)

Answer

Flexible Metal Conduit (FMC)

Answer

Surface Metal Raceway

Question 6

Per NEC Chapter 9, Table 1, when a conduit contains only one conductor, the maximum permitted fill is:

Accepted Answer

53%

Answer

31%

Answer

40%

Answer

60%

Question 7

Surface Metal Raceway (such as Wiremold) differs from standard conduit primarily because it:

Accepted Answer

Has a removable cover allowing easy access to installed conductors

Answer

Must be installed underground

Answer

Can only carry low-voltage wiring

Answer

Requires a separate grounding conductor at all times