ICC E3 case studies
ICC E3 · Put your knowledge to work in context.
The ICC Electrical Plans Examiner (E3) credential is one of the International Code Council's certification exams for building safety professionals. It is intended for individuals who review electrical construction documents for code compliance rather than those who install or inspect wiring in the field, and it is commonly pursued by plan reviewers, code officials, and designers who work with electrical drawings. The ICC E3 case studies are 5 cases and about 2,190 words.
1Plan Review of a Mixed-Use Addition: Which Code Edition Governs?
A designer submits plans for a two-story addition to an existing mercantile building. The jurisdiction adopted a new edition of the electrical code effective January 1, and the plans were signed and sealed by the engineer on December 20 of the prior year but submitted for permit on February 3.
462 words, about 2 min2Multi-Wire Branch Circuit Shared Neutral in a Kitchen Remodel
A remodel converts a kitchen and adds a 20 A, 120/240 V multi-wire branch circuit (two ungrounded conductors sharing one neutral) to serve the microwave and the disposal. The electrician terminates both ungrounded conductors on a two-pole breaker and lands the shared neutral on the neutral bar.
425 words, about 2 min3Grounding Electrode System for a Detached Garage Subpanel
A homeowner adds a 100 A subpanel in a detached garage fed by a 100 A feeder from the main service panel in the house. The electrician drives two ground rods at the garage and runs an equipment grounding conductor in the feeder.
456 words, about 2 min4Plan Review of a Hazardous (Classified) Location Storage Room
Plans for a new paint storage room show a Class I, Division 2 location because of flammable liquid storage. The plans specify general-purpose fluorescent luminaires mounted on the ceiling, standard snap switches inside the room at the door, and a convenience receptacle on the interior wall.
418 words, about 2 min5Service Calculation Dispute for a Small Restaurant
A tenant build-out for a small restaurant submits a service calculation for a new 200 A, 120/208 V, 3-phase service. The calculation lists: 12 kW of general lighting and receptacles, a 15 kW electric range, a 6 kW water heater, a 10 kW HVAC unit, and 8 kW of miscellaneous kitchen equipment.
429 words, about 2 min