raceways and fittings 26108-17

The purpose of a sealing fitting is to

• carry wires through conduit and other types of raceways

• connect conduit to boxes

• bundle wires and cables together

• minimize the passage of gases, vapors, and flames through a conduit

The type of anchor shown in the figure above is a

• drop-in anchor

• toggle bolt

• drive-in anchor

• self-drilling anchor

NEC Article 344 provides the requirements for

• PVC

• IMC

• EMT

• RMC

One characteristic of aluminum conduit is that it

• requires more maintenance

• is too thin to be threaded

• does not require supplementary corrosion protection when used in concrete

• is more resistant to wet environments

A type of conduit that has a wall thickness less than that of RMC but thicker than EMT is

• PVC

• HDPE

• IMC

• LFNC

The voltage drop of conductors carrying alternating current in PVC will be less than that of identical conductors in

• steel conduit

• LFNC

• plastic conduit

• HPDE

A type of fitting used to prevent damage to PVC caused by temperature changes is a(n)

• combination coupling

• hinged coupling

• flex connector

• expansion coupling

To act as a moisture seal, an outer covering of liquidtight, sunlight-resistant flexible material is placed around

• flexible metal conduit

• flexible nonmetallic conduit

• high-density polyethylene conduit

• rigid polyvinyl chloride conduit

EMT is

• conduit is constructed of metal thick enough to cut pipe threads at eachend

• steel conduit coated with a black enamel

• often referred to as thinwall conduit and too thin to be threaded

• conduit that has been given a thin coating of PVC

EMT must be supported every

• 4' (1.2 m)

• 10' (3 m)

• 5' (1.5 m)

• 15' (4.5 m)