AZ ROC R-11 Electrical study guide
AZ ROC R-11 Electrical · Work through your exam, one topic at a time.
The Arizona Registrar of Contractors (AZ ROC) issues contractor licenses by classification, and the R-11 Electrical classification is the electrical trade credential within that system. AZ ROC - established in 1931 - licenses and regulates residential and commercial contractors, and licensing is tied to qualifying through examinations plus experience requirements. The AZ ROC R-11 Electrical study guide has 6 sections and about 2,179 words.
01Electrical Systems and General Electrical Knowledge
Questions in this domain test fundamentals more than memorized tables. Be fluent with Ohm's law (E = I x R), the power formulas (P = I x E for resistive loads; P = 1.732 x E x I x PF for three-phase), and the distinction between kW (real power) and kVA (apparent power).
357 words, about 2 min02Wiring Methods, Materials, and Installations
Chapter 3 governs how raceways and cables are installed. Know the common methods by article number and application: NM cable (334), AC (320), MC (330), FMC (348), LFMC (350), EMT (358), IMC (342), RMC (344), PVC (352).
379 words, about 2 min03Overcurrent Protection, Grounding, and Bonding
Know the standard ratings in 240.6 and the small-conductor rules in 240.4(D): 14 AWG to 15 A, 12 AWG to 20 A, 10 AWG to 30 A, unless a specific article permits otherwise (motor circuits under 240.4(G) are the classic exception). The next-size-up rule in 240.4(B) allows rounding up only where the device does not exceed 800 A and the load does not exceed the conductor ampacity.
381 words, about 2 min04Electrical Equipment, Motors, and Controls
The governing principle is that motor conductors and protection are sized from table values, not nameplate current. Use Tables 430.247 through 430.250 for full-load current (FLC), then apply: branch-circuit conductors at 125 percent of FLC (430.22); overload protection sized to the motor nameplate and service factor (430.32); short-circuit and ground-fault protection per 430.52, typically up to 250 percent of FLC for an inverse-time breaker, 175 percent for a dual-element fuse, and 300 percent for a non-time-delay fuse.
355 words, about 2 min05National Electrical Code and Arizona Electrical Rules/Statutes
NFPA 70 is organized into Chapters 1 through 4 (general requirements that apply everywhere), Chapter 5 (special occupancies), Chapter 6 (special equipment), Chapter 7 (special conditions), Chapter 8 (communications), and Chapter 9 (tables). Annexes A through I are informational only and are not enforceable.
365 words, about 2 min06Estimating, Safety, and Project Management
The estimate is built from a quantity takeoff against the plans: device counts, fixture counts, linear footage of raceway and cable, panel and gear counts, and equipment. Apply labor units (hours per item or per hundred feet), then multiply by a fully burdened labor rate that includes payroll taxes, insurance, and benefits, typically 25 to 40 percent on top of base wage.
342 words, about 2 min