Journeyman Electrician's General Flashcards
7 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 7 Journeyman Electrician's General flashcards as text
What is the maximum length of a flexible cord used as a substitute for fixed wiring in a dwelling unit?
Answer: Flexible cord cannot be used as a substitute for fixed wiring
Per NEC 400.12, flexible cords and cables shall not be used as a substitute for the fixed wiring of a structure.
According to the NEC, what is the minimum burial depth for a 120V residential branch circuit installed in a rigid metal conduit (RMC)?
Answer: 6 inches
NEC Table 300.5 specifies a minimum cover of 6 inches for rigid metal conduit regardless of voltage for residential branch circuits.
A 240V, single-phase motor draws 18 amps at full load. What is the minimum rating of the branch circuit conductors?
Answer: 22.5 amps
NEC 430.22 requires branch circuit conductors for a single motor to have an ampacity of not less than 125% of the motor FLC: 18 × 1.25 = 22.5 amps.
Which of the following is the correct color for a grounded (neutral) conductor in a 277/480V, 3-phase, 4-wire wye system?
Answer: Either white or gray
NEC 200.6 permits white or gray insulation to identify the grounded conductor, and either is acceptable for any voltage system.
What device is required by the NEC when a grounding electrode conductor is spliced?
Answer: Listed irreversible compression connector or exothermic weld
NEC 250.64(C) requires grounding electrode conductor splices to be made with irreversible compression connectors or by exothermic welding.
In a 3-phase, 4-wire, 120/208V system, what is the voltage measured between any two ungrounded (hot) conductors?
Answer: 208V
In a wye-connected 120/208V system, the line-to-line voltage is 120V × √3 ≈ 208V.
According to the NEC, what is the maximum number of quarter-bends (360 degrees total) allowed between pull points in a conduit run?
Answer: Four quarter-bends (360°)
NEC 358.26 (and similar for other raceways) limits bends between pull points to 360 degrees total — equivalent to four quarter-bends.