# MinnesotaElectricianExam

> Free, independent practice for the Minnesota Class A journeyworker and master electrician exams given by the Department of Labor and Industry (DLI), on the 2026 NEC, which Minnesota adopted without amendments and has used on the exams since September 8, 2026. Unlimited calculation problems with worked steps that cite the 2026 NEC section to open, untabbed code lookup drills, Laws and Rules Booklet drills quoted from Minnesota Statutes and Rules, practice exams timed like DLI, and sourced guides. English only, like the exam. Problems are original and generated, not real exam questions. NEC text and tables are never reproduced. Minnesota facts checked 2026-11-15.

Key facts (DLI examination guide): 80 multiple-choice questions, 5½ hours, 70% to pass; given at DLI in St. Paul; DLI provides a soft-cover 2026 NEC with no tabs, the Laws and Rules Booklet and a basic calculator, and you bring nothing else; $50 application and exam fee (Minn. Stat. 326B.092). First-attempt pass rates in the Board of Electricity's January 15, 2026 minutes: 32% journeyworker, 46% master.

## Start here
- [Home](https://minnesotaelectricianexam.com/)
- [Calculations](https://minnesotaelectricianexam.com/calculations/): 29 calculation topics with worked steps and unlimited practice.
- [Practice exams](https://minnesotaelectricianexam.com/practice-test/): Journeyworker and master, 80 questions timed like DLI.
- [Class A journeyworker electrician practice exam](https://minnesotaelectricianexam.com/practice-test/journeyworker/): 80 questions in 5½ hours, 70% to pass, with an untabbed 2026 NEC, the Laws and Rules Booklet and a calculator.
- [Class A master electrician practice exam](https://minnesotaelectricianexam.com/practice-test/master/): The same 80 questions and 5½ hours, harder questions with more steps: services, feeders, motors and multi-rule problems.
- [Code lookup practice](https://minnesotaelectricianexam.com/code-lookup/): 102 NEC lookup questions, with an untabbed mode: name the article, then the section, timed.
- [Laws and rules](https://minnesotaelectricianexam.com/laws-and-rules/): 207 questions on Minnesota Statutes 326B and Minnesota Rules 1315, 3800 and 3801, each with the quoted provision.
- [Formula sheet](https://minnesotaelectricianexam.com/formula-sheet/): Every formula with the 2026 NEC section to open.
- [2026 NEC changes](https://minnesotaelectricianexam.com/nec-2026-changes/): Article 220 became Article 120; 2 VA/ft² dwelling load; 8 kVA optional tier; new dryer factors.
- [Pass rates](https://minnesotaelectricianexam.com/pass-rates/): Minnesota exam pass rates from the Board of Electricity minutes.
- [Glossary](https://minnesotaelectricianexam.com/glossary/): Electrical terms used on the exam.
- [Guides](https://minnesotaelectricianexam.com/guides/): Exam day, the untabbed book, licences, experience, CE, contractors and other states.
- [About and sources](https://minnesotaelectricianexam.com/about/)

## Full text
- [Everything](https://minnesotaelectricianexam.com/llms-full.txt): All calculation topics and guides as Markdown.

## Calculations: Dwelling load calculations
- [Dwelling optional load calculation](https://minnesotaelectricianexam.com/calculations/dwelling-optional-load/): The optional method adds every general load at nameplate (2 VA/ft² lighting, 1,500 VA per small-appliance and laundry circuit, range, dryer, water heater and other appliances), takes the first 8 kVA at 100% and the rest at 40%, then adds the heat or AC load from 120.82(C) and any EV charger at 100%.
- [Dwelling standard load calculation](https://minnesotaelectricianexam.com/calculations/dwelling-standard-load/): The standard method adds the dwelling loads one group at a time, each with its own demand factor: general lighting at 2 VA/ft² plus 1,500 VA per small-appliance and laundry circuit through Table 120.45, 75% of four or more fastened appliances, the dryer, the range from Table 120.55 and the larger of heat or AC. Divide the total by 240 V for the service amperes.
- [Fastened appliance demand load](https://minnesotaelectricianexam.com/calculations/appliance-demand/): In a dwelling standard calculation, add the nameplate ratings of the fastened-in-place appliances such as the water heater, dishwasher, disposal, trash compactor and built-in microwave. If there are four or more, take 75% of the total (120.53). Ranges, dryers, space heat, air conditioning and EV chargers are not part of this group.
- [Feeder and service neutral load](https://minnesotaelectricianexam.com/calculations/neutral-load/): The neutral carries only line-to-neutral load, so leave out 240 V loads such as the water heater, heat and AC. Add the 120 V loads after their demand factors, plus 70% of the range and dryer demand loads (120.61(B)(1)). If the result is over 200 A, the part above 200 A may be taken at 70%.
- [Multifamily optional load calculation](https://minnesotaelectricianexam.com/calculations/multifamily-optional/): For three or more dwelling units that each have electric cooking and electric heat or AC, add each unit's connected load (2 VA/ft², 1,500 VA per small-appliance and laundry circuit, appliance nameplates and the larger of heat or AC), multiply by the number of units, then by the Table 120.84 demand factor for that many units. House loads are added separately.

## Calculations: Commercial load calculations
- [Commercial kitchen equipment demand](https://minnesotaelectricianexam.com/calculations/kitchen-equipment-demand/): For three or more pieces of commercial cooking, dishwashing and similar kitchen equipment, add the nameplate ratings and multiply by the Table 120.56 factor for the number of units (90% for 3, 80% for 4, 70% for 5, 65% for 6 or more). The result may not be less than the two largest units added together.
- [Commercial lighting load](https://minnesotaelectricianexam.com/calculations/commercial-lighting-load/): Multiply the floor area by the Table 120.42(A) unit load for the occupancy, such as 1.3 VA/ft² for an office or 1.9 VA/ft² for retail. Add 200 VA per foot of show window and 1,200 VA per sign outlet. In the 2026 NEC the 125% continuous factor is applied when sizing the feeder conductors and OCPD, not inside the load calculation.
- [Receptacle load](https://minnesotaelectricianexam.com/calculations/receptacle-load/): In non-dwelling buildings, count 180 VA for each receptacle yoke (120.14(I)) and add any multioutlet assembly load (120.14(H)). If the total is over 10,000 VA, take the first 10,000 VA at 100% and the rest at 50% (Table 120.47).

## Calculations: Conductors and overcurrent
- [Ampacity correction and adjustment](https://minnesotaelectricianexam.com/calculations/ampacity-correction/): To derate a conductor, take its Table 310.16 ampacity (the 90 °C column for 90 °C wire), multiply by the ambient temperature correction factor from Table 310.15(B)(1)(1) and by the Table 310.15(C)(1) adjustment factor for more than three current-carrying conductors. The result may not exceed the ampacity in the termination column.
- [Conductor sizing](https://minnesotaelectricianexam.com/calculations/conductor-sizing/): To size a conductor, find the smallest size in Table 310.16 whose ampacity covers the load, reading the column your terminations allow under 110.14(C): 60 °C for circuits of 100 A or less unless the equipment is marked 75 °C, and 75 °C above 100 A. Then check 240.4(D) for 14, 12 and 10 AWG.
- [Continuous loads](https://minnesotaelectricianexam.com/calculations/continuous-loads/): A continuous load runs at its maximum current for 3 hours or more. Branch-circuit and feeder conductors and overcurrent devices must be rated at least 125% of the continuous load plus 100% of the noncontinuous load (210.19, 210.20, 215.2, 215.3). Round the device up to the next standard size.
- [Overcurrent device sizing](https://minnesotaelectricianexam.com/calculations/ocpd-sizing/): An overcurrent device must protect the conductor at its ampacity. If the ampacity is not a standard rating and the device is 800 A or less, 240.4(B) lets you use the next standard size up from 240.6(A). Over 800 A you must round down (240.4(C)), and 14, 12 and 10 AWG conductors are capped by 240.4(D).
- [Voltage drop](https://minnesotaelectricianexam.com/calculations/voltage-drop/): Voltage drop is the voltage lost in the conductors. For single-phase, VD = 2 × K × I × L ÷ CM; for three-phase, use 1.732 instead of 2. K is 12.8 for copper and 21.1 for aluminum, the values DLI uses, L is the one-way length in feet and CM comes from Chapter 9, Table 8. Percent drop is VD ÷ source voltage × 100.

## Calculations: Motors
- [Motor branch-circuit conductors](https://minnesotaelectricianexam.com/calculations/motor-branch-circuit/): Branch-circuit conductors for one continuous-duty motor must have an ampacity of at least 125% of the motor's table full-load current (NEC 430.22). Look up the full-load current in Table 430.248 or 430.250, multiply by 1.25, then pick the conductor from Table 310.16 in the column that matches the terminal temperature rating.
- [Motor feeders](https://minnesotaelectricianexam.com/calculations/motor-feeder/): A feeder for several motors needs conductors rated at least 125% of the largest motor's table full-load current plus the full-load currents of the other motors (NEC 430.24). The feeder breaker or fuse may be no larger than the largest motor branch-circuit device plus the other motors' full-load currents (430.62(A)), so you round down.
- [Motor full-load current](https://minnesotaelectricianexam.com/calculations/motor-full-load-current/): Motor full-load current (FLC) for sizing conductors and short-circuit protection comes from NEC Table 430.248 (single-phase) or 430.250 (three-phase), found by horsepower and voltage, not from the nameplate. The nameplate current is used only for sizing the overload protection.
- [Motor overload protection](https://minnesotaelectricianexam.com/calculations/motor-overloads/): A separate motor overload relay is sized from the nameplate full-load current, not the NEC table. Under 430.32(A)(1) it may trip at no more than 125% of nameplate current for motors with a service factor of 1.15 or more or a marked temperature rise of 40 °C or less, and 115% for all other motors.
- [Motor short-circuit protection](https://minnesotaelectricianexam.com/calculations/motor-ocpd/): A motor's branch-circuit breaker or fuse is sized by multiplying the table full-load current by the percentage in Table 430.52(C)(1) for the device type, such as 250% for an inverse time breaker or 175% for a dual-element fuse. If the result is not a standard size, Exception No. 1 lets you use the next standard size up.

## Calculations: Boxes and raceways
- [Box fill](https://minnesotaelectricianexam.com/calculations/box-fill/): Box fill is the minimum volume a box needs for the conductors, devices, clamps and fittings inside it. Count each item the way NEC 314.16(B) says, multiply each count by the volume allowance for its conductor size, and add the results.
- [Conduit fill](https://minnesotaelectricianexam.com/calculations/conduit-fill/): Conduit fill limits how much of a raceway's cross section the conductors may take up: 40% for more than two conductors. Add up the area of every conductor from Chapter 9 Table 5, then pick the smallest trade size in Table 4 whose 40% area is at least that total.
- [Pull box sizing](https://minnesotaelectricianexam.com/calculations/pull-box-sizing/): Pull box sizing under NEC 314.28 applies to conductors 4 AWG and larger. A straight pull needs a box 8 times the trade size of the largest raceway; an angle or U pull needs 6 times the largest raceway in a row plus the trade sizes of the other raceways in that row.

## Calculations: Grounding and bonding
- [Equipment grounding conductor sizing](https://minnesotaelectricianexam.com/calculations/egc-sizing/): The equipment grounding conductor is sized from the rating of the overcurrent device protecting the circuit, using Table 250.122, not from the load or the circuit conductors. If the ungrounded conductors are made larger, for example for voltage drop, the EGC must grow by the same circular mil ratio (250.122).
- [Grounding electrode conductor sizing](https://minnesotaelectricianexam.com/calculations/gec-sizing/): The grounding electrode conductor (GEC) is sized from the largest ungrounded service-entrance conductor, or the combined area of one phase of parallel sets, using Table 250.66. If the GEC runs only to a ground rod it never has to be larger than 6 AWG copper; only to a concrete-encased electrode, 4 AWG copper; only to a ground ring, the size of the ring.

## Calculations: Transformers
- [Transformer current](https://minnesotaelectricianexam.com/calculations/transformer-current/): A transformer's full-load current on either side is its kVA rating times 1,000 divided by that side's voltage, and also divided by 1.732 for a three-phase transformer. Voltage changes in the same ratio as the turns, and current changes in the opposite ratio.
- [Transformer overcurrent protection](https://minnesotaelectricianexam.com/calculations/transformer-protection/): For a transformer rated 1000 V or less, NEC Table 450.5(B) (Table 450.3(B) in the 2023 NEC) sets the largest overcurrent device as a percentage of rated current. With primary protection only, the limit is 125% of a primary current of 9 A or more; with both primary and secondary protection, the primary may go to 250% and the secondary to 125% of a secondary current of 9 A or more.

## Calculations: Electrical theory
- [Ohm's law and power](https://minnesotaelectricianexam.com/calculations/ohms-law/): Ohm's law says voltage equals current times resistance (E = I × R), and power equals voltage times current (P = E × I). Pick the version of the formula that solves for the value you need from the two values you know.
- [Power factor and efficiency](https://minnesotaelectricianexam.com/calculations/power-factor-efficiency/): True power in watts equals apparent power in volt-amperes times the power factor, so kW = kVA × PF. Efficiency is output divided by input, and one horsepower of motor output equals 746 watts, so a motor's input watts are hp × 746 ÷ efficiency.
- [Series and parallel circuits](https://minnesotaelectricianexam.com/calculations/series-parallel-circuits/): In a series circuit the resistances add and the same current flows through each one. In a parallel circuit every branch gets the full voltage, and the total resistance is the reciprocal of the sum of the reciprocals, which is always smaller than the smallest branch.
- [Three-phase power](https://minnesotaelectricianexam.com/calculations/three-phase-power/): For a balanced three-phase load, current equals volt-amperes divided by the line-to-line voltage times 1.732 (the square root of 3). For a single-phase load, current is volt-amperes divided by voltage, even when the load is fed from two phases of a three-phase system.

## Guides
- [Minnesota Journeyworker Electrician Exam Guide](https://minnesotaelectricianexam.com/guides/minnesota-journeyworker-electrician-exam/): Learn the Minnesota journeyworker exam format, time limit, passing score, supplied materials, question styles, and reported pass rates.
- [Minnesota Master Electrician Exam Guide](https://minnesotaelectricianexam.com/guides/minnesota-master-electrician-exam/): Prepare for the Minnesota master electrician exam with its format, difficulty range, supplied references, knowledge areas, and pass-rate context.
- [Minnesota Electrician Exam Day in St. Paul](https://minnesotaelectricianexam.com/guides/exam-day-in-st-paul/): Plan for the Minnesota electrician exam in St. Paul: arrival, picture ID, exam hours, supplied materials, room rules, breaks, and emailed results.
- [What Minnesota Provides in the Electrician Exam Room](https://minnesotaelectricianexam.com/guides/what-you-get-in-the-exam-room/): Know the code book, Laws and Rules Booklet, calculator functions, unit system, and power-factor assumption used in Minnesota electrician exams.
- [Studying With an Untabbed NEC for the Minnesota Exam](https://minnesotaelectricianexam.com/guides/studying-with-an-untabbed-code-book/): Practice finding NEC rules without tabs using the table of contents, index, article-first searches, timed lookup drills, and a useful error log.
- [How to Study Minnesota Electrician Exam Calculations](https://minnesotaelectricianexam.com/guides/how-to-pass-the-calculations/): Build a calculation study plan from DLI topics: algebra, circuits, voltage drop, transformers, conduit fill, ampacity, box fill, and motor circuits.
- [The Minnesota Electrician Laws and Rules Booklet](https://minnesotaelectricianexam.com/guides/the-laws-and-rules-booklet/): Learn what Minnesota’s exam booklet covers and how to study licensing, supervision, experience, fees, permits, and inspection duties with practice.
- [Retaking the Minnesota Electrician Exam](https://minnesotaelectricianexam.com/guides/retaking-the-minnesota-electrician-exam/): Understand Minnesota electrician exam retakes: the waiting period, new application and fee, rescheduling, written comments, and pass-rate context.
- [Minnesota Journeyworker Electrician License Requirements](https://minnesotaelectricianexam.com/guides/minnesota-journeyworker-license-requirements/): Review Minnesota journeyworker experience categories, approved school credit, registration, the exam fee, license renewal, and continuing education.
- [Minnesota Master Electrician License Requirements](https://minnesotaelectricianexam.com/guides/minnesota-master-electrician-license-requirements/): Compare Minnesota master electrician qualification routes, experience limits, exam and renewal fees, license terms, education, and responsible-master duties.
- [Electrician Licenses From Other States: Minnesota](https://minnesotaelectricianexam.com/guides/electrician-licenses-from-other-states/): Check Minnesota journeyworker and master reciprocity states, qualifying conditions, required fees, and the board’s recorded decision on Texas reciprocity.
- [Registered Unlicensed Electrician in Minnesota](https://minnesotaelectricianexam.com/guides/registered-unlicensed-electrician/): Understand Minnesota electrician registration, fees, direct supervision, employer limits, renewal education, and the records needed for experience credit.
- [Minnesota Electrician Continuing Education](https://minnesotaelectricianexam.com/guides/minnesota-electrician-continuing-education/): Plan Minnesota electrician renewal education: required hours, NEC subjects, approved courses, first master terms, and rules against carrying credits forward.
- [Minnesota Electrical Contractor License Requirements](https://minnesotaelectricianexam.com/guides/minnesota-electrical-contractor-license/): Review Minnesota electrical contractor duties for the responsible master, bond, insurance, replacement notices, vehicle markings, and advertising.
- [Other Minnesota DLI Electrical Licenses](https://minnesotaelectricianexam.com/guides/other-dli-electrical-licenses/): Compare Minnesota power limited, maintenance, lineman, elevator, Class B installer, and satellite credentials by scope, qualifications, and exam length.
- [How to Become an Electrician in Minnesota](https://minnesotaelectricianexam.com/guides/how-to-become-an-electrician-in-minnesota/): Follow Minnesota’s electrical licensing path from registered unlicensed work to journeyworker and master, with experience, exam, and renewal guide links.