EETC Conduit & Raceway Systems 3

Question 1

When conduit penetrates a fire-rated wall or floor assembly, the NEC and building codes require:

Accepted Answer

An approved firestop system or fire-rated sealant to restore the fire rating

Answer

Any penetration through a fire-rated assembly must be sealed with a listed firestop system to restore the fire resistance rating and prevent the spread of fire and smoke through the opening.

Question 2

The NEC requires conduit ends to be reamed or otherwise finished after cutting in order to:

Accepted Answer

Remove sharp edges that could damage conductor insulation during pulling

Answer

Reaming removes burrs and sharp edges left by cutting, which could nick or damage the insulation of conductors as they are pulled through the conduit.

Question 3

When PVC conduit is installed in a location subject to physical damage, the NEC requires using:

Accepted Answer

Schedule 80 PVC, which has a thicker wall for greater impact resistance

Answer

Schedule 80 PVC has a significantly thicker wall than Schedule 40 and is listed for use where subject to physical damage, providing greater resistance to impact.

Question 4

A wireway differs from conduit in that it:

Accepted Answer

Features a hinged or removable cover that provides access to conductors at any point

Answer

A wireway (also called a lay-in duct or trough) has a removable cover along its entire length, allowing conductors to be placed and accessed without pulling through a closed raceway.

Question 5

Flexible Metal Conduit (FMC) may serve as the equipment grounding conductor (EGC) without a separate ground wire only when:

Accepted Answer

The circuit is protected at 20 amperes or less and the FMC length does not exceed 6 feet

Answer

Per NEC 348.60, FMC may serve as the EGC when the circuit overcurrent protection does not exceed 20 amperes and the total length of FMC in the ground return path does not exceed 6 feet.

(EETC) Electrical Technician Certification Practice Test

(EETC) Electrical Technician Certification Practice Test

EETC Conduit & Raceway Systems 3