NEC Navigation & Tabbing
The SP-PH exam is open book. That sounds easy — it isn't. With ~4.5 minutes per question, the people who fail are the people who go page-hunting. The fix is a well-tabbed, familiar book.
The one rule: Don't look up everything. Look up what you must verify. Know the structure cold so you land on the right article in seconds, then read only the line you need.
How the NEC is organized
The Code is laid out in a predictable order. Internalize this and you'll know roughly where to flip before you even open the index:
| Chapter 1 (Art. 90–110) | General — definitions, working space, terminations |
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| Chapter 2 (Art. 200–285) | Wiring & protection — grounding (250), overcurrent (240), branch circuits (210), loads (220) |
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| Chapter 3 (Art. 300–399) | Wiring methods & materials — boxes (314), conductors/ampacity (310), raceways |
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| Chapter 4 (Art. 400–490) | Equipment — appliances (422), heating (424), motors (430), A/C (440) |
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| Chapter 9 + Tables | Conduit fill tables, examples |
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| Index (back) | Your fastest tool for anything you haven't tabbed |
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Priority tab set for SP-PH
Tab these first — they cover the bulk of the question bank. Write the article number on the tab so you can scan the page edge.
- Table 250.66 — grounding electrode conductor sizing
- Table 250.122 — equipment grounding conductor sizing
- 240.4(D) — small-conductor overcurrent limits
- 240.6(A) — standard OCPD ratings
- Table 310.16 — conductor ampacity
- 110.14(C) — termination temperature ratings
- Table 314.16(A) & (B) — box fill
- Tables 430.248 & 430.250 — motor full-load currents
- 430.22 / 430.32 — motor conductor & overload sizing
- Article 440 — air-conditioning & refrigeration equipment
- Article 422 & 424 — appliances & fixed electric heat
- Table 220.12 — general lighting loads
- Table 110.26(A)(1) — working space depths
- 210.8 — GFCI requirements
🖨 Get the printable tab set →
Code-book rules at the testing center: references must be softbound, spiral, or hardbound — no loose-leaf. You may highlight, underline, and tab/annotate before the exam. Confirm the current rules (and whether you bring your own NEC or it's furnished) in the PSI exam handbook when you register.
A 3-step lookup routine
- Identify the topic — grounding? motor? box fill? That tells you the article.
- Go to your tab — not the index, if you tabbed it.
- Read only the rule — find the number/percentage, confirm, answer, move on.
Practice the routine on real questions
Every practice answer names the article — use it to find the rule in your own book.
Start the Practice Exam →