Ten prompts a round. Each one describes a job the way an exam question describes it, and you pick the NEC 2026 table or section you would open out of four. Forty four tables and sections are in the bank, and no table is reproduced here.
Get one worked question a week, the same style as these prompts, and every one of them names the table it was answered out of. Unsubscribe in one click.
Level one draws from the nineteen tables and sections a calculation question reaches for over and over. Level two opens the whole bank. Level three is the whole bank with fifteen seconds a prompt, and a prompt that runs out of clock counts as a miss.
The exam is open book, so the number is never the thing being withheld. Time is. A candidate who reads a stem and already knows the page turns one calculation question into ninety seconds instead of four minutes.
Ten prompts is about what two calculation questions cost you in routing decisions. Play a level until the destination arrives before you finish reading the stem, then go work the numbers on the ampacity sprint.
Almost every calculation question on the journeyman and master exams opens with a sentence that names a physical thing: a conductor in a conduit, a motor of some horsepower, a box with so many wires in it, a service of a given size. That noun is the routing instruction. Ampacity of a conductor sends you to Table 310.16, horsepower of a three-phase motor sends you to Table 430.250, cubic inches in a box sends you to Table 314.16(A) and Table 314.16(B)(4).
The second sentence usually adds a condition, and the condition is a second table rather than a different one. An ambient of 45 degrees C adds Table 310.15(B)(1)(1). Nine conductors in the pipe adds Table 310.15(C)(1). Terminations rated 75 degrees adds 110.14(C). A candidate who treats the condition as a new question loses the thread, and a candidate who treats it as one more multiplier keeps moving.
The trap the exam sets is a stem that reads like one table and answers out of another. Full load current of a motor is not the nameplate, it is Table 430.248 or Table 430.250. Conduit fill for one size of conductor is not arithmetic, it is Informative Annex C. The smallest conductor a breaker allows is not the ampacity table, it is 240.4(D). Every one of those pairs is in the bank because every one of them costs candidates a minute.
The 2026 edition moved some of these addresses. Load calculations are Article 120 rather than Article 220, transformer overcurrent protection is Table 450.5(B), and burial cover is Table 300.7(A). Every number this game shows you was checked against the 2026 book before it went in.
The drill shows you are sizing an equipment grounding conductor for a 200 ampere feeder, and offers Table 250.66, Table 250.122, Table 250.102(C)(1) and 250.52.
The answer is Table 250.122, because that is the one keyed to the rating of the overcurrent device ahead of the circuit, which is the only number the stem gave you. Table 250.66 is keyed to the size of the service conductors, so it answers the grounding electrode conductor question instead. Table 250.102(C)(1) is keyed to the ungrounded conductors and sizes bonding jumpers. 250.52 is the list of what may be used as an electrode at all.
All four sit within a page or two of each other in Article 250, which is exactly why the wrong one is easy to open. Reading what the stem gives you first, the device rating or the conductor size, picks the table before you turn a page.
Forty four tables and sections, grouped the way the drill draws its wrong answers: a prompt is most likely to be offered against its neighbours. The wording in the right hand column was written for this page. The tables themselves belong to NFPA and are not printed here, so bring the 2026 book, which the exam requires anyway, and read the row there.
| Table or section | What you go there for |
|---|---|
| Ampacity and correction | |
| Table 310.16Common | The ampacity of insulated conductors in a raceway, a cable or the earth, written for three or fewer current-carrying conductors at a 30 degree C ambient. |
| Table 310.15(B)(1)(1)Common | The correction factor for an ambient other than 30 degrees C, the multiplier that lands on the ampacity you just read. |
| Table 310.15(C)(1)Common | The percentage each conductor is cut to once more than three current-carrying conductors share one raceway or one cable. |
| 110.14(C)Common | The rule that ties the ampacity you are allowed to use to the lowest temperature rating among the terminations, the conductor and the device. |
| Table 400.5(A)(1)All tables | The ampacity of flexible cords and flexible cables, which is a separate table from the one building wire is read out of. |
| Overcurrent devices | |
| 240.4(D)Common | The ceiling on the overcurrent device for the small conductor sizes, applied after any correction for ambient temperature and number of conductors. |
| Table 240.6(A)Common | The list of ampere ratings a fuse or an inverse time circuit breaker is built in, which is what you round a calculated load up to. |
| Table 430.52(C)(1)Common | The percentage of motor full load current each kind of short circuit and ground fault protective device may be set at. |
| Table 450.5(B)All tables | How large the overcurrent device on a transformer of 1000 volts or less may be, as a percentage of rated current, primary only or primary and secondary. |
| Table 210.24(1)All tables | One line each for conductor size, tap size, overcurrent device, receptacle rating and permitted load, set out by branch circuit rating for copper. |
| Grounding and bonding | |
| Table 250.66Common | The size of the grounding electrode conductor, read across from the largest ungrounded service conductor. |
| Table 250.122Common | The smallest equipment grounding conductor allowed for a given rating of overcurrent device ahead of the circuit. |
| Table 250.102(C)(1)Common | The size of the grounded conductor, the main bonding jumper, the system bonding jumper and the supply side bonding jumper. |
| 250.52All tables | What counts as a grounding electrode, and what is not permitted to be used as one. |
| 680.26All tables | The equipotential bonding around a permanently installed pool, what gets bonded together and with what conductor. |
| Boxes | |
| Table 314.16(A)Common | The volume of each standard metal box and how many conductors of one size that box will hold. |
| Table 314.16(B)(4)Common | The cubic inches counted for one conductor of each size, the figure every box fill sum multiplies. |
| 314.28All tables | How a pull box or a junction box gets sized once the raceway holds conductors of 4 AWG or larger. |
| Motors | |
| Table 430.248Common | The current figure for a single-phase alternating current motor, found from its horsepower and its voltage rather than from the nameplate. |
| Table 430.250Common | The current figure for a three-phase alternating current motor, found from its horsepower and its voltage. |
| Table 430.247All tables | The current figure for a direct current motor, found from its horsepower and its armature voltage. |
| Table 430.251(B)All tables | The locked rotor current a polyphase design B, C or D motor is taken to draw, which is how a horsepower rated switch gets picked. |
| Raceway fill and bending | |
| Chapter 9 Table 1Common | The share of a raceway you are allowed to fill for one conductor, two conductors or more than two, together with the notes that go with it. |
| Chapter 9 Table 4Common | The inside area of every trade size of every raceway type, already worked out at 60, 53, 40 and 31 percent. |
| Chapter 9 Table 5Common | The outside diameter and the area of one insulated conductor, listed by insulation type and size. |
| Informative Annex CCommon | The finished conductor counts for a raceway when every conductor is the same size, worked ahead of time from the Chapter 9 tables. |
| Chapter 9 Table 2All tables | The smallest bend radius allowed for each conduit and tubing size, one shot and full shoe benders in one column and other bends in the next. |
| Chapter 9 Table 5AAll tables | The dimensions and areas of compact stranded building wire, which runs smaller than the concentric stranded figures. |
| Table 352.44All tables | How much a PVC conduit run grows or shrinks over a temperature change, which is what decides whether an expansion fitting goes in. |
| Table 392.22(B)(1)All tables | The fill area allowed for single conductor cables in a ladder, ventilated trough or wire mesh cable tray. |
| Conductor properties | |
| Chapter 9 Table 8Common | Circular mil area, strand count, overall diameter and direct current resistance per 1000 feet, by conductor size. |
| Chapter 9 Table 9All tables | Alternating current resistance, reactance and effective impedance for three single conductors in a conduit at 75 degrees C. |
| Chapter 9 Table 10All tables | How many strands a conductor of each class and each size is made from, copper and aluminum. |
| Load calculations | |
| 120.41All tables | The volt-amperes per square foot a dwelling is calculated at, and the outlets that figure already covers. |
| Table 120.42(A)All tables | The volt-amperes per square foot used for lighting in each kind of non-dwelling occupancy. |
| Table 120.45All tables | The demand factors that cut a calculated lighting load, block of volt-amperes by block of volt-amperes and occupancy by occupancy. |
| Table 120.54All tables | The demand percentage for household electric clothes dryers, read from how many dryers the feeder serves. |
| Table 120.55All tables | The demand for household cooking appliances, read from how many there are and how large they are. |
| 120.82All tables | The optional calculation for one dwelling unit on a three-wire 120/240 volt or 208Y/120 volt service of 100 amperes or more. |
| 210.52All tables | Where 125 volt 15 and 20 ampere receptacle outlets have to go in a dwelling, wall space by wall space and counter by counter. |
| Installation limits | |
| Table 300.7(A)All tables | How deep a buried raceway or cable has to sit, set out by wiring method and by what is on top of it. |
| Table 110.26(A)(1)All tables | How much clear depth has to be kept in front of equipment, set out by voltage to ground and by what is behind you. |
| Table 110.28All tables | Which enclosure type numbers suit each indoor and each outdoor condition. |
| 555.35All tables | The ground fault protection required on feeders, branch circuits and receptacles at marinas, boatyards and docking facilities. |
Every table number and section number in this game was located in the 2026 National Electrical Code before it went into the bank, and the file header lists each one with the line it was found on. No table content, no code text and no printed table title appears on this page. The answer to a prompt is an address, and the values behind that address are yours to read in your own copy of the book.
The ones this game calls the common level: Table 310.16 for ampacity, Table 310.15(B)(1)(1) and Table 310.15(C)(1) for the two corrections, Table 240.6(A) for standard device ratings, Table 250.66 and Table 250.122 for grounding and bonding, Table 314.16(A) and Table 314.16(B)(4) for boxes, Table 430.248 and Table 430.250 for motor current, and Chapter 9 Tables 1, 4, 5 and 8 for raceway fill and conductor properties. A calculation question usually pulls from two or three of them in one go. Learning which one answers which sentence is most of the speed you gain.
The Texas journeyman and master exams are open book and you bring your own code book, so nothing on this page asks you to memorize a value. What the clock takes from you is search time, and a candidate who reads a stem and knows the page before opening the book finishes with room to check the arithmetic. That is the one skill this game drills.
Because the number is in front of you during the exam and the routing is not. A stem that says full load current of a 10 horsepower three-phase motor is asking for Table 430.250, and a candidate who reaches for the ampacity table instead loses a minute before noticing. Naming the destination first is the habit that makes the lookup quick, and the ampacity sprint on this site drills the cell once you are on the page.
No. The tables and the code text belong to NFPA and are not printed here in any form. Each option is a table number or a section number with a description written for this page, and the answer sends you to your own copy of the 2026 code to read the row. You need that book in the exam room anyway.
A Texas journeyman or master item, the arithmetic shown, and a line on each wrong answer naming the mistake that produces it. Unsubscribe in one click.