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(IB) Class-B Installer Electrician

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Minnesota DOLI
Electrical Contractor Licensing

443 Lafayette Road North
St. Paul, MN  55155
Phone: (651) 284-5034
Exam Type
Exam Content

We have created a free table (found at the button below) that relates specific NEC articles to the subject areas listed in the exam exam bulletin published by the Minnesota DOLI.

Knowledge Areas
4Introduction (90)
16General Requirements
231Wiring and Protection
325Wiring Methods and Materials
410Equipment for General Use
51Special Occupancies
61Special Equipment
5Applied Electrical Theory, Electrical Systems and Equipment
Total number of test questions:
Time allowed (hours):
Books Allowed in the Exam
National Electrical Code (NFPA-70), 2020, NFPA
Buy at Builders Book
Electrical Codes and Rules, Minnesota Statutes
Web Page Link

NOTE: Since the DOLI bulletin does not list specific "Codes and Rules" sections (from reference #2) to study for your exam, they will not be included in our sample questions.

Additional Recommended Books
Ferm’s Fast Finder Index, 2020, IAEI
Buy at Builders Book
Tom Henry‘s Key Word Index, 2020, Tom Henry
Buy at Builders Book

We highly recommend that you purchase one of the reference books above to study for your exam.  Each book is a comprehensive subject index to the NEC.  They provide an even faster way to look up answers in the code and are far more detailed than the index at the end of the code book.

Ugly‘s Electrical References, 2020, George Hart
Buy at Builders Book

The book above contains practical applications of the NEC such as Ohm‘s Law, series/parallel circuits, voltage drop, load calculations, motor phases, impediance, inductance and math formulas you are expected to know.  “Basic Knowledge” and “Electrical Calculations” are subjects covered in the exam and are assumed (most likely not listed as a subject for electrical and mechanical exams of all types).

Available Study Materials
(IB) Class B Installer
Practice Exam

This package contains approx. 420 sample questions from the NEC and the 2020 Ugly's Reference.

Code sections are based on the table we have designed (linked above) and matched with subjects called out in sub-sections lised by the exam bulletin.

Additional bonus sample calculations for Ohm's Law and Series/Parallel combination circuits are included.

Questions in this version do not include statues.

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