A searchable 2023 NEC quick reference: sections, tables, drawings, field testing and code topics, with calculators for the neutral count, overcurrent device sizing, series ratings and wire-bending space. Tick any mix and it writes one PDF with a contents page.
The app’s own example, in order: the screen as it opens, one entry read through, and three entries saved to a PDF. 18 steps.
STEP 1 OF 18The example opens filled in: the neutral and overcurrent calculators. Search first, then each entry with its Select tick.
STEP 2 OF 18More entries: 310.15(C)(1), 240.21(B) feeder taps, 240.21(C), Feeder Tap Rules, fill adjustment, and the neutral.
STEP 3 OF 18Does the neutral count? By circuit, with the NEC section and the current-carrying count for each.
STEP 4 OF 18The row people miss: two ungrounded off a 3-phase wye. The calculator below is set to that circuit.
STEP 5 OF 18The neutral answer: YES, count the neutral. The equipment grounding conductor is never counted, 310.15(F).
STEP 6 OF 18What an overcurrent device protects: branch circuit, motor branch circuit, motor overload, motor feeder, drive.
STEP 7 OF 18Overcurrent protection, size a device for my circuit: feeder, 300 A continuous load.
STEP 8 OF 18100 A noncontinuous, conductor ampacity 475 A. The answer: 500 A.
STEP 9 OF 18Hazardous locations, series ratings, wire-bending space Tables 312.6(A) and (B)(2), and Chapter 9 Table 8.
STEP 10 OF 18Chapter 9 Table 9, NEMA enclosure types, 240.6(A) standard ratings with AIC vs SCCR, and Table 250.122.
STEP 11 OF 18Southwire DLO cable, Table 400.5(A)(3), knockouts and spacing, GFPE, and what changed in the 2026 NEC.
STEP 12 OF 18Field Testing & Safety: megohmmeter, motor insulation, ground resistance, live-dead-live, transfer switch, and more.
STEP 13 OF 18The end of the list: Code Finder, Articles 110 to 695, with its own Select tick.
STEP 14 OF 18240.21(B) opened: outside taps, no next size up, and the 10 ft, 25 ft and outside rules.
STEP 15 OF 18The drawing: three taps from a 400 A feeder device, 8 AWG, 3/0 AWG and 1/0 AWG copper, then the worked example.
STEP 16 OF 18The worked example ends: all three from a 400 A feeder device, with the source, 2023 NEC.
STEP 17 OF 18Three entries selected: feeder taps, the neutral and overcurrent protection. Save PDF or Share.
STEP 18 OF 18The PDF, page 1: the contents, then 240.21(B) with its drawing and worked example.
The same 18 screens with the captions burned in. No sound.
MP4, 2.3 MB, 19 seconds.
The PDF of the three selected entries, 3 pages.
On Android, $49.99 once. Everything on this page.
The Suite has the Code Reference screen with the neutral, overcurrent, hazardous locations and series rating dialogs and the core tables. The app's search, a Select tick on everything for one PDF, the drawings, Field Testing & Safety, GFPE, the 2026 change list and the completed Tables 312.6 are being brought back across.
