Technical & Safety · Module 3
Wiring and Protection
15lessons · ~129 min
364questions
14%of the exam
01Feeders: Sizing(215), Overcurrent Protection, Taps (240.21), and Outside Feeders to Other Buildings (225) · 7 min · public preview02GFCI and AFCI Protection in the 2023 NECWhere, What Rating, and the Exceptions · 8 min · public preview03Service FundamentalsOne Service per Building, the Disconnect, and the 2023 Emergency Disconnect · 10 min · public preview04Branch-Circuit Ratings, Conductor Minimums, Permissible Loads and the Required Dwelling Circuits8 min · public preview05Dwelling Load Calculations in the 2023 NECArticle 220 Standard and Optional Methods · 11 min · public preview06Feeder CalculationsWorked Examples (215.4, 310.15, Table 310.16, 240.21(B), 120.61, Chapter 9 Table 8) · 7 min · public preview07Feeder Grounding and BondingSeparate Buildings (250.32), the Feeder EGC (Table 250.122 and 250.122(D)/(E)/(H)/(I)), Where the Neutral May and May Not Be Bonded (250.142), and Feeder GFCI/GFPE/Autotransformer Rules · 9 min · public preview08Grounding at the ServiceElectrodes, the Grounding Electrode Conductor, and the Main Bonding Jumper · 10 min · public preview09Required Receptacle and Lighting Outlets in Dwellings210.52, 210.60–210.65, 210.70 · 7 min · public preview10Equipment Grounding ConductorsWhat Counts, How to Size Them (Table 250.122), and How to Connect Them · 8 min · public preview11Service Load CalculationsWorked Examples (Article 220 Parts III–IV, 310.12, 230.42, Table 250.66, 450.3) · 11 min · public preview12Fault CurrentAvailable Fault Current, Interrupting Ratings, SCCR, Series Ratings and the 110.24 Label · 9 min · public preview13Branch-Circuit and Appliance CalculationsWorked Examples (210.19–210.23, 422.10–422.13, 424.4, 440.32, Table 120.55) · 6 min · public preview14Separately Derived Systems and Transformer SecondariesWorked Examples (250.30, Table 250.102(C)(1), Table 250.66, 250.104(D), 240.21(C), Table 450.5(B), 450.6) · 9 min · public preview15Service Conductors and Service Equipment in DetailClearances (230.24), Underground (230.30–230.33), Service-Entrance Conductors (230.40–230.54), Equipment Rules (230.62–230.82) and Service Overcurrent Protection (230.90–230.94) · 9 min · public preview
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