NEC Architecture case studies
NEC Architecture · Put your knowledge to work in context.
The NEC Architecture exam is a code-application credential for electricians, electrical engineers, plan reviewers, inspectors, and contractors who need to demonstrate working command of the National Electrical Code as an architectural and design reference. Unlike a memorization test, it is built around scenario-based multiple-choice items that ask you to locate the governing article, apply it to a described installation, and choose the compliant answer. The content spans general requirements and administration, wiring and protection, wiring methods and materials, equipment for general use, special occupancies, special equipment, special conditions, communications systems, and the code tables and annexes, with a final domain on plan review and code application that ties the rest together. Preparation works best as a structured pass through the code: read each article for intent, practice tabbing and indexing your copy, then drill timed scenario questions so that lookup speed becomes automatic. The NEC Architecture case studies are 5 cases and about 2,656 words.
1Service Conductor Sizing for a Mixed-Demand Restaurant
A 4,800 sq ft restaurant is served by a 208Y/120 V, three-phase, four-wire service. The connected load schedule shows: 42 kVA of kitchen equipment (continuous), 18 kVA of general lighting, 12 kVA of receptacle load, and a 25 kVA HVAC load (noncontinuous).
670 words, about 3 min2GFCI Protection in a Kitchen Remodel with Old Wiring
A 1970s single-family dwelling kitchen is being remodeled. The existing branch circuits are two-wire (no equipment ground) NM cable.
502 words, about 3 min3Conductor Fill and Derating in a Crowded Conduit
EMT run of 40 ft carries twelve 10 AWG THHN copper current-carrying conductors and four 12 AWG THHN equipment grounding conductors between a panel and a junction box. The conduit passes through a boiler room where the ambient temperature is 45°C for 20 ft.
487 words, about 2 min4Motor Circuit Overload and Short-Circuit Protection Coordination
A 50 hp, 460 V, three-phase, 60 Hz induction motor with a 1.15 service factor drives a conveyor. Nameplate FLA is 62 A.
494 words, about 2 min5Plan Review: Exit Signage and Emergency Lighting in a Mercantile Building
A 12,000 sq ft retail store is being reviewed. The plan shows two means of egress, each 36 in.
503 words, about 3 min