Journeyman Electrician’s Exam Cheat Sheet 2026

The 30 highest-yield Journeyman Electrician’s Exam facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the maximum number of disconnects permitted for a single service per NEC 230.71? → Six disconnects
2. What is a "rolling offset" in conduit bending? → An offset that travels in two planes simultaneously, both vertically and horizontally
3. A 120/240V single-phase service feeder supplies two 240V loads of 8,000W each and a 120V load of 3,000W. What is the neutral current? → 12.5 A
4. What is the minimum clearance required in front of a panelboard with exposed live parts on one side only (Condition 1) per NEC 110.26(A)(1)? → 36 inches
5. At a subpanel in a detached garage fed by a feeder from the house, which conductors must be run to the subpanel? → Hot, neutral, and a separate equipment grounding conductor
6. GFCI protection is required for receptacles installed within how many feet of the inside walls of a permanently installed swimming pool at a dwelling unit? → 20 feet
7. For industrial and commercial buildings, the required lighting load is ___ volt amperes per square foot: → 2
8. What is the capacitive reactance (X_C) of a 100 μF capacitor at 60 Hz? → 26.5 Ω
9. When a 480 Y/277 volt, three-phase, 4-wire electrical system is used to supply a commercial service with a 400 ampere rating, the service is rated as follows: → 332.5 kVA
10. Per NEC 680.23(A)(1) and (A)(6), a replacement underwater pool luminaire must be: → Listed for use as a swimming pool luminaire and the installation must be watertight
11. There will be a voltage drop of _______ V in a single phase, 240 V circuit with 3 AWG AI conductors powering a 40 A load 300' away from the power panel. → 9.67
12. An outlet box installed in an outdoor location exposed to rain must be: → Listed for use in wet locations
13. In a 3-phase, 4-wire wye system where the line-to-line voltage is 208V, what is the line-to-neutral (phase) voltage? → 120 volts
14. In a commercial location, GFCI protection for 125-volt, 15- and 20-ampere receptacles is required in which area? → Kitchens, bathrooms, rooftops, and other specified locations
15. Per NEC 240.6, which of the following is NOT a standard ampere rating for fuses and inverse time circuit breakers? → 35 amperes
16. Equipment installed in Class I, Division 1 locations must be listed as: → Explosion-proof or intrinsically safe
17. Per NEC Article 760, what equipment requirement applies to all fire alarm system wiring and devices? → Equipment and wiring must be listed for fire alarm service
18. When is it permissible to use the next higher standard OCPD size above a conductor's ampacity? → When the conductor ampacity does not correspond to a standard OCPD rating
19. Per NEC Chapter 9, Table 2, what is the minimum bending radius to the centerline for 2-inch EMT conduit with conductors that do not have a lead sheath? → 12 inches
20. Flexible cord used with portable equipment in a hazardous Class I, Division 2 location must be: → Extra-hard-usage cord with grounding conductor
21. NEC Article 500 classifies hazardous locations using which system? → Division system only
22. Emergency system feeder conductors must have an ampacity sufficient to: → Handle all emergency loads that could be energized simultaneously
23. What is the minimum overhead clearance required for service drop conductors above the water surface of a swimming pool? → 22.5 feet
24. For a 240-volt, single-phase residential air conditioner with a nameplate rating of 24 amperes, what is the minimum branch circuit conductor ampacity? → 30 amps
25. Per NEC 680.22(C), switching devices (light switches) near a pool must be located at least how far horizontally from the inside walls of the pool? → 5 feet
26. What is the ampacity of 250 kcmil copper THHN at 90°C per NEC Table 310.15(B)(16)? → 290A
27. Which of the following locations is explicitly prohibited for the installation of overcurrent devices, according to NEC 240.24? → In the bathrooms of dwelling units
28. A circuit's ability to store electrical energy is known as . → Capacitance
29. What is the maximum load permitted on a 20-ampere branch circuit serving general lighting and receptacles? → 16 amperes
30. Where must the LINE terminals of a GFCI receptacle be connected? → To the source conductors coming from the panelboard