Ten numbers a round. Each question gives you a section or article from the 2023 edition and its subject, and you say where that rule sits in the 2026 edition Texas adopts on September 1 under 16 TAC 73.100. The row behind the answer comes back whole: the verdict, the confidence grade, the document it was read in, and what now occupies the number you left behind.
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The round
Free, weekly
One 2026 NEC change a week, with the old number beside the new one
One row a week, worked the way a question here is worked: the old number, the new one, and the document it was read in. What moved, what was reused, and what Texas amended on the way in. Short enough to read on the truck. Unsubscribe in one click.
What a round draws on
Every question is one of the fifty numbers this site has read against the 2026 edition. A row becomes a question only when it names a 2023 number and a 2026 place to put it, so ten of the fourteen free rows can be asked and forty of the fifty can be asked once the full set is open. The four free rows that are not asked are named below with the reason, because a question that cannot be graded is worse than no question.
215.2, minimum rating and size of feedersThe row carries no 2026 destination, because the site published one, could not stand it up, and took it back. Reading Article 215 in the 2026 text settles it the other way: the article runs 215.1, then 215.4, 215.5, 215.7 and on, there is no 215.2 at all, and minimum rating and size is the heading at 215.4. The row stands as the site published it until the correction is logged in public, so the number is here and not in the round.
270.50A sound row about an amendment issued after the book printed, and not a move. Article 270 is new in the 2026 edition, so there is no 2023 number behind it to ask about.
625.54The row names special purpose ground-fault protection for electric vehicle supply and a date of 1 January 2029. The 2026 text at 625.54 is ground-fault circuit-interrupter protection for personnel at receptacles used for electric vehicle charging, with no date attached, and the delayed clause in that neighborhood is 626.30(C) in the electrified truck parking article, which the row says carries no delayed date of its own. The book does not support the row as written, so it is not asked.
Article 750 looked up in a 2026 bookThe other end of the reused number pair, and a good row to read. As a question the prompt would print its own answer.
What the confidence grade means
Every answer carries one of these four, and the grade is part of the answer rather than a footnote to it. The counts are for all fifty rows.
Read in the bookRead in the 2026 edition on NFPA free access, on the date the row shows. 21 rows.
Read in a draftRead in one of NFPA's own code-making panel draft reports, which print section text with changes marked. The row names the document and the revision number. 24 rows.
InferredNot read. Derived from how the article renumbered as a whole. The row says so in its own words. 0 rows.
Not settledTwo sources disagree and nothing we hold settles it. The row prints both readings and sends you to your own copy. 5 rows.
Questions people ask
Do I need the code book to play?
No. The round runs on rows this site has already read, and the question, the answer and the source all sit in this page. You should still turn to the number in your own copy before you write it on a tab, which is what the source line under each answer is for.
Where do the questions come from?
From the crosswalk rows on this site. Each row names a 2023 number, the subject, where the rule sits in the 2026 edition, and the document it was read in. Ten of the fourteen free rows can be asked as a question, and the other four say why they cannot.
What does the quiz cost?
The round on this page is free, needs no account and needs no network. The $29 crosswalk purchase opens the rest of the fifty rows, so a round draws from forty numbers instead of ten. One payment, no subscription, and the same token works on the crosswalk page.
Why do some answers say the number did not move?
Because that is what the row found. Eight of the fifty numbers stayed where they were, and several of those had the rule underneath them rewritten instead. Knowing a number held is worth as much as knowing it moved and it takes less time to act on.
The round asks about fifty numbers, which is what this site has read rather than what exists. It is the 2023 to 2026 delta only, and it is not the whole edition.
Getting a question right here is not the same as knowing the rule. The quiz asks where the rule lives, and your own copy holds what it says.
Nothing here reproduces code text, a code table or a table row. Local amendments sit on top of the adopted edition and are a question for the authority having jurisdiction.