Disclaimer
Last updated October 2026
PhasorPrep is an independent study resource. It is not affiliated with, endorsed by, or sponsored by NCEES. Questions are original and written for practice; they are not actual exam questions. Calculators are for learning, not for engineering design.
Not engineering advice
The calculators, questions and solutions teach methods for an exam. They are not engineering advice and not a substitute for a design by a qualified engineer who knows your installation, your local code and your utility.
Codes and standards
Where a question depends on a code or standard, we name the document, its edition and the section, and we do not reproduce its text or tables. Check the edition your exam uses and the edition your project is designed to.
Who writes the material
The questions and solutions are written by a utility power engineer who works in generation, substations and protection. PhasorPrep does not claim that its author holds a professional engineering license in any US state.
No promised result
Studying with PhasorPrep does not promise a passing result on any exam.
Found a mistake?
Email support@phasorprep.com with the page or question id. We check every report and correct the material.