NCCER Electrical study guide
NCCER Electrical · Work through your exam, one topic at a time.
NCCER Electrical is the electrical craft area within NCCER's construction education and assessment programs. NCCER - the National Center for Construction Education & Research, an independent 501(c)(3) nonprofit founded in 1996 - delivers craft training through standardized, modular curricula and, through its National Craft Assessment and Certification Program (NCACP), assesses both the knowledge and the hands-on skill of current craft professionals against industry standards. The NCCER Electrical study guide has 6 sections and about 2,006 words.
01Electrical Safety
Electrical safety questions come from two sources: OSHA (29 CFR 1910 Subpart S and 1926 Subpart K) and NFPA 70E for work practices. Know the three boundaries on the 70E approach chart.
341 words, about 2 min02Electrical Theory and Circuits
Ohm's law (V = I x R), the power equations (P = V x I = I squared x R = V squared / R), Kirchhoff's voltage law (sum of drops around a loop equals the source) and Kirchhoff's current law (current into a node equals current out). Series circuits share one current and divide voltage; parallel circuits share one voltage and divide current.
330 words, about 2 min03National Electrical Code and Code Calculations
NFPA 70 has nine chapters. Chapters 1 through 4 apply generally; Chapters 5 through 7 modify or supplement them; Chapter 8 (communications) stands alone; Chapter 9 holds the tables.
326 words, about 2 min04Raceways, Boxes, and Fittings
Article 300 gives the general wiring-method rules. Then know the individual articles: 342 IMC, 344 RMC, 348 FMC, 350 LFMC, 352 PVC, 358 EMT.
333 words, about 2 min05Conductors, Cables, and Wiring Devices
Table 310.16 gives ampacities in 60, 75, and 90 degree columns. Which column you may use depends on the weakest link: conductor insulation, terminals, and equipment.
340 words, about 2 min06Grounding, Bonding, Motors, and Controls
Grounding connects the system to earth; bonding connects metal parts together so they stay at the same potential. Article 250 covers the grounding electrode system (250.52, 250.53), the grounding electrode conductor sized from 250.66, and the equipment grounding conductor sized from 250.122, which is based on the overcurrent device, not the conductor size.
336 words, about 2 min