Journeyman Electrician’s Exam Wiring Methods and Materials 2

Question 1

What distinguishes Type AC cable from Type MC cable regarding the equipment ground?

Accepted Answer

AC contains an internal bonding strip and relies on the armor for grounding

Answer

AC uses aluminum conductors throughout

Answer

MC requires conduit protection in all locations

Answer

AC has a PVC outer jacket

Question 2

Type UF cable is specifically designed and listed for which primary application?

Accepted Answer

Direct burial underground

Answer

Indoor dry locations only

Answer

Wet locations above grade in conduit

Answer

Exposed outdoor runs on structures

Question 3

Per NEC Table 310.16, what is the ampacity of a 12 AWG copper conductor with 90°C (THHN) insulation in a raceway?

Accepted Answer

25 amperes

Answer

20 amperes

Answer

30 amperes

Answer

15 amperes

Question 4

When flexible metal conduit (FMC) exceeds 6 feet in length, what additional grounding measure is required?

Accepted Answer

A separate equipment grounding conductor inside the FMC

Answer

No additional measure needed

Answer

A bonding bushing at the panel only

Answer

Grounding is prohibited through FMC

Question 5

Per NEC 330.30, at what maximum interval must Type MC cable be supported when installed on structural members?

Accepted Answer

6 feet

Answer

3 feet

Answer

4.5 feet

Answer

10 feet

Question 6

Which wiring method is permitted in a Class I, Division 1 hazardous (classified) location?

Accepted Answer

Rigid metal conduit (RMC) with threaded fittings

Answer

EMT with set-screw fittings

Answer

Type NM cable

Answer

Type AC cable