CEP Cheat Sheet 2026

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

1. What is a conductor? → Allows electricity flow
2. What is the purpose of bonding a metal water pipe system to the electrical service per NEC 250.104? → To provide a low-impedance fault current path and equalize potentials
3. A technician uses a digital multimeter to measure continuity on a de-energized 480V three-phase motor feeder. Before testing, the correct safety step is: → Verify voltage is absent using a two-probe test with an appropriate CAT III/IV meter
4. What is the first step in troubleshooting? → Identify the problem
5. Which OSHA standard requires employers to establish, implement, and enforce an electrical safety program for employees who work on or near electrical hazards? → OSHA 1910.331–.335
6. Norton's equivalent circuit consists of: → A current source in parallel with a resistance
7. According to OSHA 1910.333, what is the minimum approach distance for unqualified workers near exposed energized parts at 50V to 300V? → They must avoid contact but no specific distance is mandated
8. Why is documentation important during troubleshooting? → Track steps & causes
9. What does the NEC Article 110.26 specify regarding working space in front of electrical equipment rated 600V or less? → Minimum 30 inches of width and depth based on voltage class
10. In a delta-connected three-phase load, the relationship between line current and phase current is: → I_line = I_phase × √3
11. Which of the following correctly describes a 'ground fault' in an electrical circuit? → An unintended connection between an energized conductor and a grounded surface or earth
12. The purpose of overload relays in a motor starter is to: → Protect the motor from sustained overcurrent caused by mechanical overloading
13. Which personal protective equipment (PPE) principle applies to ALL CEP certified professionals regardless of their specific role? → PPE must be properly fitted, maintained, and replaced as needed
14. What documentation is needed after maintenance? → Work and test records
15. What is the PRIMARY purpose of obtaining CEP certification in Certified Electrical Professional? → To demonstrate verified competency and adherence to professional standards
16. What is system testing? → Evaluate complete system
17. What is the purpose of applying anti-oxidant compound when terminating aluminum conductors on lugs? → To prevent the oxide layer from increasing resistance at the connection
18. When new equipment is introduced in Certified Electrical Professional, what is REQUIRED before staff use it? → Formal training, competency verification, and documentation
19. What does a circuit breaker do? → Interrupts current during overload
20. What does NEC 210.52 require regarding receptacle spacing in residential habitable rooms? → A receptacle must be within 6 feet of any point along the floor line
21. What is the MOST important reason for maintaining equipment maintenance logs in CEP practice? → To track maintenance history, predict failures, and demonstrate compliance
22. During a short-circuit capacity test of a diesel generator, the generator output voltage collapses and does not recover. The most likely cause is: → The excitation system (AVR) has failed or is disabled
23. In a three-phase balanced system, the phase voltage is related to the line voltage by: → V_line = V_phase × √3
24. According to NEMA standards, a Size 1 motor starter has a maximum continuous current rating of: → 27 amperes
25. When installing a new branch circuit, a technician needs to connect to a panelboard that is energized. What is the FIRST safety step? → Perform an arc flash risk assessment and don appropriate PPE
26. Under NEC 230.70, the service disconnecting means must be located: → Outside the building or nearest the point of entry inside
27. A variable frequency drive (VFD) controls AC motor speed by varying: → Both output frequency and voltage simultaneously
28. When using a spectrum analyzer during a power quality survey, a pronounced peak is observed at 180 Hz on a 60 Hz system. This is the: → 3rd harmonic, typically caused by single-phase nonlinear loads
29. Skin effect in AC conductors causes current to concentrate: → Toward the outer surface of the conductor
30. What is the purpose of an Equipment Grounding Conductor (EGC) in a branch circuit? → To provide a low-impedance fault current path to operate overcurrent protection