Wiring Methods and Materials Flashcards
6 cards from real Journeyman Electrician’s Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Wiring Methods and Materials flashcards as text
Per NEC Chapter 9 Table 1, what is the maximum conduit fill percentage when 4 or more conductors are installed?
Answer: 40%
NEC Chapter 9, Table 1 limits conduit fill to 40% of the cross-sectional area when 4 or more conductors are installed.
Which cable type is NOT permitted for use in wet or damp locations?
Answer: Type NM cable
Type NM (Romex) cable is only listed for use in dry locations and is prohibited in wet or damp environments.
Per NEC Table 300.5, what is the minimum cover requirement for RMC installed beneath a one- or two-family dwelling driveway?
Answer: 6 inches
NEC Table 300.5 requires only 6 inches of cover for RMC under a one- or two-family dwelling driveway due to its mechanical strength.
Per NEC 350.30(A), what is the maximum length of flexible metal conduit (FMC) permitted when used as a luminaire whip?
Answer: 6 feet
NEC 350.30(A) limits FMC used as a fixture whip to a maximum length of 6 feet.
Which cable type is specifically listed and permitted for installation in a cable tray system?
Answer: Type MC
Type MC (Metal-Clad) cable is listed for use in cable tray systems per NEC Article 392 and 330.
What is the minimum trade size for electrical metallic tubing (EMT) per NEC 358.20?
Answer: 1/2 inch
Per NEC 358.20, EMT is manufactured and permitted in trade sizes starting at 1/2 inch minimum.