NEC / IEC Code Reference Lookup

The code is not a book you memorise - it is a list of places you go to verify before you cut. The craft is knowing which clause owns which question, and that is exactly what this reference keeps at your fingertips.

NEC / IEC Code Reference Lookup curates the most-used NEC articles and IEC 60364 clauses into one searchable table, grouped by topic: sizing, protection, grounding, motors, testing.

It points you to the rule. The authority text of the code edition in force decides the answer.

• Curated entries: The sections working electricians actually open.
• Keyword search: Filters by topic and wording.
• Section search: Jump to 210.20 or 250.122 directly.
• Both standards: NEC and IEC side by side.
• Topic filter: Sizing, protection, grounding, motors, testing.
• Related tools: Links to the calculators that do the math.
• Export: Copy or download the filtered result.

1. Type a keyword (continuous, grounding, motor) or a section number.
2. Filter by topic if you want to narrow further.
3. Read the matching entries for section and scope.
4. Open the related calculator to apply it.
5. Consult the code text for the exact wording.

Lookup "continuous": NEC 210.19/210.20 and IEC 60364-4-43 appear - the 125% rules for continuous loads.

Lookup "250.122": The equipment grounding conductor table for NEC installations.

Lookup "motor": NEC 430 and IEC 60364-5-55 surface with overload and feeder rules.

• Faster fieldwork: Find the rule, not the whole book.
• Cross-standard: NEC and IEC in one place.
• Topic grouped: Like with like.
• Calculator-linked: Apply the rule immediately.
• Private: No uploads, no accounts, no logging.