In order to be "guaranteed pass" you must complete 15 total practice exams which generally takes 80 to 100 classroom hours. You will have three months to complete the course. In the classroom, you will need the National Electrical Code and a basic calculator (not on your cell phone).
Attention Electricians: the preparation course for the 2023 codes will be available June 1st. Exams on the 2020 code must be completed before August 1st.