What happens when a page here is wrong
People sit exams on this. A quietly edited mistake is worse than a recorded one.
The policy
Errors get fixed, the fix gets dated, and the error gets recorded here rather than disappearing.
Sites that silently edit their mistakes give you no way to judge how many they make.
Why the stakes are real here
Someone reads a page, sits an exam, and either passes or does not. A retake costs money and a month.
That is why the things this site does not know are stated instead of filled in.
The log
Corrections are recorded here with the date, what was wrong, and what it was changed to. Nothing is quietly edited.
| Date | Page | What was wrong | What it says now |
|---|---|---|---|
| 2026-08-23 | Box fill | Said all equipment grounding conductors in a box share one volume allowance, however many there are. That was the old rule, and it was also the worked answer in a practice question. | Up to four share one allowance and each one after the fourth adds a quarter, per 314.16(B)(5). Six is one and a half. The practice question was rewritten to test the threshold. |
| 2026-08-23 | Grounding vs bonding | Attributed the earth is not an effective fault current path to 250.4(A)(4), and the low impedance path wording to 250.4(A)(3). | Both sit under 250.4(A)(5). The earth sentence is 250.4(A)(5)(c). |
| 2026-08-23 | Services | Said 230.71 requires service disconnects to be grouped. | 230.71 sets the count. 230.72 requires grouping and marking. |
| 2026-08-23 | Code navigation | Sent readers to 312.6 for wire-bending space, to 120.80 for the optional dwelling method, and to 230.71 for grouping. | 312.9, 120.82 and 230.72. There is no 312.6 in the 2026 edition at all. |
| 2026-08-23 | GFCI and AFCI | Said 210.12 is organized around branch circuits rather than locations. | It turns on location. Each subsection is a list of rooms and areas. |
| 2026-08-23 | Overcurrent, small conductors | Said the 2026 edition added the remote adjustable-trip breaker rules at 240.6(D). | The 2026 text marks that section as revised, not as new, so it predates this cycle. |
| 2026-08-23 | Transformer calculations | Cited 450.3 for transformer overcurrent protection, and stated 240.4(F) without its two permitted configurations. | 450.5. In 2026, 450.3 is Reconditioned Equipment and both subsections are reserved. The 240.4(F) note now names the exceptions. |
| 2026-08-23 | Wiring methods, feeders, voltage drop | Cited 300.4 for protection against physical damage and 215.2 for minimum feeder rating. | 300.6 and 215.4. Both moved in the 2026 edition. |
| 2026-08-24 | Code navigation, and a correction to a correction | The entry above, dated 2026-08-23, says there is no 312.6 in the 2026 edition at all. That is wrong, and it is wrong in the dangerous direction. | Article 312 renumbered as a block, so 312.6 exists and carries a different rule. A stale tab lands on real text rather than on nothing, which is harder to notice. The destination for wire-bending space, 312.9, was right. We have not read what now sits at 312.6, so we do not say. |
| 2026-08-24 | Practice bank, answer position | Every question in the bank was written with the correct option first and the practice exam printed options in that order, so answering A to everything scored one hundred percent. | The paper now shuffles each question's options when it is drawn, carrying the answer key and the per-option explanations with it. Three tests were added, and each one fails if the shuffle is removed. |
| 2026-08-24 | Practice bank, exam simulation mix | The simulation drew sixty percent of its questions from the calculation areas. | The published blueprint is twenty-four calculation items out of eighty scored, which is thirty percent. The simulation now matches it and is clocked at the real per-portion pace. Practice mode still leans toward calculations on purpose, because those portions carry the lower pass rates. |
| 2026-08-24 | Practice bank, a motor conductor question | One question offered 152.75 amperes as its correct answer while its own worked explanation reached 151.75 twice. No option on the screen was right. | The option is 151.75. A check was added that fails the build when a numeric answer does not appear in the working that argues for it. |
| 2026-08-23 | Load calculations, branch circuits | Cited 120.14 for dwelling small-appliance and laundry loads, 120.80 for the optional method, and stated the 3 VA per square foot branch circuit figure without scoping it. | 120.52 and 120.82. The 3 VA figure is scoped to dwelling units; non-dwellings use Table 120.42(A). |
Every one of these was found by reading the 2026 code text against pages that were already published, not by a reader reporting it. That is the check working, and it is also the reason the log exists.