Free Practice Test
ICC Commercial Fire Alarm Plans Examiner I (CN)
Practice the plan-review work CN actually tests — documentation, control panel and wiring, and the battery, voltage-drop and conduit-fill calculations that make up a fifth of the exam.
What you’ll get
Instant Score
See your percentage and how you compare immediately.
Topic Breakdown
Find out which topics you're strong in and where you need work.
Codebook Explanations
Unlock detailed explanations with exact code references.
Free to Unlock
Enter your email after the test to see which questions you missed.
The ICC CN certification qualifies you to review commercial fire alarm construction documents for code compliance. Open book, 60 questions, 2 hours, against NFPA 72 (2019) and the 2020 NEC.
Related reading
ICC CN Exam Day: Bring a Calculator and Know What It May Be
Twelve of sixty questions are arithmetic. The calculator rules, open-book requirements, and how to tab for a documentation-heavy paper.
ICC CN Fire Alarm Plans Examiner: Requirements, Cost, and How to Apply
No experience requirement, and it is the gateway to CR. What the ICC CN authorizes, the books you need, what it costs, and the three-year renewal cycle.
What's on the ICC CN Fire Alarm Plans Examiner Exam? 7 Areas
A fifth of this exam is arithmetic: battery sizing, voltage drop and conduit fill. The full published domain weighting.