Licensed Electrical Contractor Wiring Methods and Materials Questions and Answers Flashcards
6 cards from real Licensed Electrical Contractor practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Licensed Electrical Contractor Wiring Methods and Materials Questions and Answers flashcards as text
What is the minimum trade size of EMT permitted to be installed per NEC 358.20?
Answer: 1/2 inch
NEC 358.20(A) specifies that the minimum trade size for EMT is metric designator 16 (1/2 inch).
Per NEC 334.80, what is the maximum ambient temperature rating for standard Type NM cable?
Answer: 90°C
NEC 334.80 states that Type NM cable is rated at 90°C but the ampacity must be based on the 60°C column per the conductor temperature limitation.
Which of the following wiring methods is NOT permitted in a commercial garage as defined by NEC Article 511?
Answer: Type NM cable
NEC 511.4 does not permit Type NM cable in commercial garages because these locations require wiring methods suitable for hazardous or industrial environments.
What is the maximum number of quarter bends (90-degree bends) permitted between pull points in a raceway per NEC 300.14?
Answer: Four
NEC 300.18 limits the total number of bends between pull points to the equivalent of four quarter bends (360 degrees total).
When splicing conductors inside a junction box, what is the minimum volume allowance per conductor for a 12 AWG wire per NEC Table 314.16(B)?
Answer: 2.25 cubic inches
NEC Table 314.16(B) assigns a volume allowance of 2.25 cubic inches for each 12 AWG conductor in box fill calculations.
What type of cable is required for direct burial without additional raceway protection when installed at the minimum required depth?
Answer: Type UF cable
Type UF (Underground Feeder) cable is specifically designed and listed for direct burial installations without additional raceway protection.