Electrical Safety
14% of exam
Wiring methods, hazardous locations, special occupancies, shock & burns.
5 concepts
Exam areas
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Wiring methods, hazardous locations, special occupancies, shock & burns.
5 concepts
Size conductors from Table 310.16 with ambient and bundling derating, respect 110.14(C) terminal limits, apply the 125% rule, and pick the OCPD per 240.4/240.6.
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Navigate Chapter 9 conduit-fill tables, 314.16 box fill, EGC and GEC sizing per 250.122/250.66, and design complete motor branch circuits with Article 430.
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Classify areas by Class, Division or Zone, and material group; match T-codes to ignition temperature; choose protection techniques; place conduit seals per 501.15.
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Apply Article 517 patient-care and essential-system rules, 680 pool bonding and GFCI, the 700/701/702 standby distinctions, and 511/514 garage classification.
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Physiological current thresholds, shock approach boundaries, the arc-flash boundary at 1.2 cal/cm², PPE selection by table or analysis, work permits, and GFCI.
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