The exam pulls from nine areas. For each one, the value is knowing which NEC article and table the answer lives in. Learn the map first, then drill questions.
The single biggest topic on most NC electrical exams. Know the difference between grounding (to earth) and bonding (joining metal parts), and how to size each conductor.
Art. 250 Table 250.66 (GEC) Table 250.122 (EGC) 250.102 (bonding jumpers)Standard breaker/fuse sizes, the "small conductor" rule, and when you can round up to the next standard size.
Art. 240 240.4 (protection of conductors) 240.4(D) (small conductors) 240.6 (standard ratings)Box fill calculations — counting conductors, devices, clamps, and grounds — and conductor volume by wire size.
Art. 314 Table 314.16(A) (box volume) Table 314.16(B) (conductor volume)Conductor ampacity, the 60/75/90°C termination rule, branch-circuit ratings, and conductor identification.
Art. 110 110.14(C) (termination temp) Table 310.16 (ampacity) Art. 210 (branch circuits)Critical for HVAC work. Use the FLC tables (not the nameplate) for conductor and overload sizing, and know the 125% rule.
Art. 430 430.22 (conductor 125%) Table 430.248 (single-phase FLC) Table 430.250 (3-phase FLC) 430.32 (overloads)Branch-circuit, feeder, and service loads; continuous vs. non-continuous (125%) loads; demand factors.
Art. 220 220.12 (lighting) 210.19/215.2 (continuous 125%)The heart of the plumbing/heating scope: air-conditioning and refrigeration equipment, fixed electric heat, water heaters, and disconnects.
Art. 422 (appliances) Art. 424 (fixed electric heat) Art. 440 (A/C & refrigeration)Definitions, working clearances, GFCI/AFCI requirements, and common field practice that may not point to one article.
Art. 100 (definitions) 110.26 (working space) 210.8 (GFCI)NC licensing rules and the business/law material from the NASCLA guide — contracts, liens, taxes, OSHA, and project management.
NASCLA NC Electrical 13th ed. NC Board rules (21 NCAC 18B)