IA Electrician study guide
IA Electrician · Work through your exam, one topic at a time.
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 IA Electrician study guide has 12 sections and about 3,717 words.
01Electrical Theory and Principles
Theory questions reward fluency with a handful of relationships and punish unit sloppiness. Ohm's law (E = I × R), power (P = E × I = I²R = E²/R), and three-phase power (P = √3 × E line × I line × power factor).
350 words, about 2 min02General Electrical Knowledge and Work Practices / Safety
Safety questions test whether you work to a procedure, not whether you memorize slogans. Know the hierarchy: eliminate the hazard, then isolate it, then protect the worker.
302 words, about 2 min03Services, Feeders, and Branch Circuits
This domain is about the hierarchy of the distribution system and where each rule applies. A service conductor carries power from the utility supply to the service equipment.
315 words, about 2 min04Conductors, Cables, and Ampacities
Ampacity is a chain of limits: the conductor's insulation rating, the termination temperature, ambient temperature, and the number of current-carrying conductors bundled together. The lowest limit governs.
301 words, about 2 min05Wiring Methods and Materials
Wiring-method questions ask: is this method permitted in this location, and is it installed and supported correctly? Non-metallic sheathed cable for dry, protected locations in dwellings; armoured and metal-clad cable where physical protection or flexible connections are needed; rigid metal conduit, IMC, and EMT for exposed and hazardous work; PVC and rigid non-metallic for corrosive and underground use; liquid-tight flexible conduit for wet or vibrating equipment connections; flexible cord only for portable equipment.
327 words, about 2 min06Boxes, Fittings, and Enclosures
Boxes exist to contain splices, support devices, and protect conductors. Two questions recur: does the box have enough volume, and is it accessible and rated for the location?
295 words, about 1 min07Switches, Receptacles, and Other Devices
Device questions test wiring logic, ratings, and protection features rather than deep theory. A single-pole switch breaks one conductor-always the ungrounded one.
308 words, about 2 min08Overcurrent Protection
Overcurrent devices protect conductors from overheating caused by overloads and short circuits. They are selected on three independent attributes: the rating (trip or melting current), the interrupting rating (the fault current they can safely clear), and the time-current characteristic (how fast they respond).
289 words, about 1 min09Grounding and Bonding
Grounding and bonding questions are usually about paths and points. The system grounded conductor (neutral) is grounded at the service; the equipment grounding conductor provides a low-impedance fault path back to the source so the overcurrent device opens.
296 words, about 1 min10Motors, Motor Controls, and HVAC Equipment
Motor questions mix tables and nameplates, and the exam expects you to know which governs. Motor full-load current usually comes from the Code tables based on horsepower and voltage, not from the nameplate-except for certain hermetic refrigerant motor-compressors, where the nameplate rated-load current governs.
306 words, about 2 min11Special Occupancies, Special Conditions, and Special Equipment
Special-location questions reward classification skills: name the hazard, name the location class or zone, then apply the wiring and equipment rules for that classification. Flammable gases and vapours fall into classes and divisions (or zones), combustible dusts into their own class, and fibres and flyings into another.
316 words, about 2 min12Code Calculations, Load Computations, and Plan/Print Reading
Calculation questions are procedural. Set out the load components in a table and step through them in the order the Code requires; most errors come from skipping a step or mixing up demand factors.
312 words, about 2 min