NCEC logo
Focused certification exam prep
About FAQ View plans
Questions, answered

NCEC practice questions - frequently asked questions

Plain answers about how NCEC Exam Prep works: the exam, the questions, pricing, the free trial, and what you actually get.

No - and you should be wary of any site claiming otherwise. Every question here is original, written to mirror the style, difficulty, and judgment the real NCEC exam tests. Each one comes with a plain-language explanation of why the right answer is right and the others aren't.

The NCEC exam spans 11 domains: Bonding and Grounding (11% of the exam); Overcurrent Protection (9% of the exam); Wiring Methods and Terminations (10% of the exam); Boxes and Fittings (7% of the exam); Service Entrance and Equipment (9% of the exam); Motors and Control Wiring (9% of the exam); Special Occupancies and Hazardous Locations (9% of the exam); Load Calculations (11% of the exam); Appliances, Equipment, and Lighting (7% of the exam); General (3% of the exam); Laws, Rules, Basic Business Practices, and Practical Applications (15% of the exam). Every practice question on this site is tagged to one of these domains.

The domains are not weighted equally on the exam. By share of the marks: Laws, Rules, Basic Business Practices, and Practical Applications 15%; Bonding and Grounding 11%; Load Calculations 11%; Wiring Methods and Terminations 10%; Overcurrent Protection 9%; Service Entrance and Equipment 9%; Motors and Control Wiring 9%; Special Occupancies and Hazardous Locations 9%; Boxes and Fittings 7%; Appliances, Equipment, and Lighting 7%; General 3%.

The NCEC exam has 100 questions and is completed in 6 hours. Our timed practice mirrors that length and pacing, so exam day feels familiar.

Try 10 free questions View plans