Arizona C-11 (CR-11) Electrical (Commercial) contractor credential Exam Study Resources

Source-linked official information is available below. Other licensing and examination details remain under primary-source review.

Note: Our practice questions are based on NEC 2023.Official Arizona licensing and exam-format details are being verified against primary sources.

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This guide includes source-linked information for C-11 (CR-11) Electrical (Commercial) contractor credential. Review the official evidence below for the fields currently confirmed, and use the linked authority sources to confirm any details that remain under review before making plans or paying a fee.

Official Source-Linked Information

We show only fields explicitly supported by current primary sources below. Other official-format fields are withheld when they are incomplete, conflicting, or not published.

Official C-11 (CR-11) Electrical (Commercial) contractor credential Information

These are the Arizona fields directly supported by the linked current sources. Other licensing and exam-format details remain under review.

Credential: C-11 (CR-11) Electrical (Commercial) contractor credential.; Source: PSI C-11 (CR-11) Electrical (Commercial) content outline, revised June 8, 2023
Trade examination provider: PSI, contracted by the Arizona Registrar of Contractors.; Source: PSI Arizona Registrar of Contractors Candidate Information Bulletin, dated February 18, 2026
Examination format: 110 questions in 240 minutes.; Source: PSI C-11 (CR-11) Electrical (Commercial) content outline, revised June 8, 2023
Passing score: A minimum passing score of 70%.; Source: PSI C-11 (CR-11) Electrical (Commercial) content outline, revised June 8, 2023
Reference policy: Candidates are responsible for bringing their own references to the examination center.; Source: PSI C-11 (CR-11) Electrical (Commercial) content outline, revised June 8, 2023
Tested NEC edition: For Code questions, the examination is based only on the NFPA 70: National Electrical Code, 2017 edition.; Source: PSI C-11 (CR-11) Electrical (Commercial) content outline, revised June 8, 2023
Trade examination fee: $66 per examination.; Source: PSI Arizona Registrar of Contractors Candidate Information Bulletin, dated February 18, 2026
Statutes and Rules Exam (SRE): The AZ Statutes and Rules Exam (SRE) is a computer-based course that costs $61.; Source: PSI Arizona Registrar of Contractors Candidate Information Bulletin, dated February 18, 2026

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Common Questions About the Arizona Electrician License

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NEC Code Study Guides

General NEC study resources. Confirm the current official exam blueprint with the applicable licensing authority.

NEC Article 110, Electrical Installations

Working space clearances (Table 110.26), temperature ratings (110.14), interrupting ratings, and workmanlike execution.

NEC Article 210, Branch Circuits

GFCI, AFCI, circuit ratings, outlet spacing, and the continuous load rule.

NEC Article 220, Load Calculations

Step-by-step residential standard and optional methods with worked examples.

NEC Article 230, Services

Overhead clearances, 6-disconnect rule, minimum 100A service, and disconnect location.

NEC Table 310.16, Wire Sizing & Ampacity

Temperature columns, correction factors, adjustment factors, and NEC 240.4(D).

NEC Article 430, Motors

Conductor sizing, SCGF protection at 250%, overload protection, and disconnect rules.

NEC Article 240, Overcurrent Protection

Standard breaker ratings, 240.4(D) small conductors, and the 10-foot and 25-foot tap rules.

NEC Article 250, Grounding & Bonding

Grounding electrode system, bonding jumpers, and equipment grounding conductors.

NEC 314.16, Box Fill Calculations

Five volume categories, cubic-inch table, and exam-style worked examples.

NEC Chapter 9, Conduit Fill

Tables C1–C12, 40% fill rule, and how to size conduit for mixed wire bundles.

Electrician Exam Math: Complete Formula Guide

Ohm's Law, power wheel, voltage drop, three-phase power, and transformer calculations with worked examples.

NEC Article 300, Wiring Methods

Physical protection, burial depths, 6-inch free conductor rule, boxes at splices, and plenum wiring.

NEC Articles 404 & 406, Switches & Receptacles

15A vs 20A receptacle rules, tamper-resistant requirements, wet/damp location covers, and snap switch grounding.

NEC Article 334, NM Cable (Romex)

Permitted uses, 4½-foot support intervals, 12-inch box rule, 1.25-inch edge clearance, and where Romex is prohibited.