Snapz Master Electrician Exam Prep Study Program for 2011 NEC 1. Covers all tested areas of the NEC completely including Definitions, Reference questions, Calculations -- and more. 2. Includes calculations for raceways, boxes, conductor sizing, dwelling units, commercial, delta/delta and delta/wye transformers -- and more. 3. Sample practice tests are timed and graded, and your results are analyzed for areas for improvement. 4. Step-by-step solutions to every question with the reasoning for every answer explained in detail. 5. Tests are patterned after all major testing agencies exams (Experior, Block, Prometric, Pearson Vue  and more).