IA Electrician case studies
IA Electrician · Put your knowledge to work in context.
An Iowa electrician license is a state-issued credential that authorizes a person to perform electrical work for compensation in Iowa. The state separates the trade into tiers - apprentice, journeyman, master, and contractor - and which examination you sit for depends on your documented experience and on the scope of work you intend to perform. The journeyman examination tests whether you can install, alter, and repair electrical systems correctly and safely while working under a master electrician. The master examination adds system design, layout, and responsibility for the work of others, and the contractor credential layers on business and code-compliance obligations. The IA Electrician case studies are 5 cases and about 3,750 words.
1Conveyor Motor Branch Circuit: Nameplate vs. Table Current
A machine shop installs a 25 hp, 480 V, three-phase, design B squirrel-cage motor on a conveyor. Nameplate data: 32.0 A, service factor 1.15, code letter G.
706 words, about 4 min2400 A Service Grounding Electrode System and a Detached Garage
A 400 A, 120/240 V single-phase service is installed on a rural house. Service-entrance conductors are 500 kcmil copper.
735 words, about 4 min3Rooftop Conduit, High Ambient, and Eight Current-Carrying Conductors
A set of four 20 A, 120 V general-purpose circuits (each carrying 16 A continuous load) is to run from a rooftop panel to equipment 90 ft away. The plan shows one 1 in.
758 words, about 4 min4Service Capacity With a New EV Charger
A 2,400 sq ft single-family dwelling has a 200 A, 120/240 V single-phase service. Existing loads: electric range nameplate 12 kW, 4,500 W water heater, 5,000 W dryer, 3-ton central A/C with nameplate 24.0 A at 240 V, a 1,200 VA dishwasher, and a 900 VA disposal.
811 words, about 4 min5Receptacle Replacement and Extension on Ungrounded 1950s Wiring
A 1955 dwelling has 2-wire, no-ground NM cable throughout. The kitchen has three existing receptacles on one 20 A circuit, about 4 ft from the sink; two are cracked and one is a 15 A, non-tamper-resistant type.
740 words, about 4 min