Module 4 — Wiring Methods & Materials
Chapter 3 (e.g., EMT, RMC, FMC, PVC, NM, MC, AC)
Need the actual NEC text?
Open NEC 2023 Free Access Viewer (NFPA.org)
Open NEC 2023 Free Access Viewer (NFPA.org)
Jump to specific wiring method articles (e.g., 358 EMT, 334 NM). Confirm support, protection, and use limits.
Learning Objectives
- Choose permitted wiring methods by location/condition.
- Apply securing/supporting, protection from damage, and bending rules.
- Cross-check fill tables and ambient/derating impacts.
Quick Reference (Common Methods)
EMT (358)
- Indoor/dry, some damp; corrosion protection as needed.
- Bends: maintain min radius; proper fittings.
- Support spacing per article; protect where subject to damage.
NM (334)
- Dwelling type locations; not in wet/damp or where exposed to damage.
- Protect within specified distances from edges; secure/support per intervals.
- Use listed staples/clamps; box entry protection.
MC (330)
- Widespread use; equipment grounding path via armor (types vary).
- Support per intervals; fitting compatibility.
- Consider vibration and bonding bushings if required.
PVC (352)
- Corrosion resistant; thermal expansion compensation.
- Support spacing changes with size/temperature.
- Protect at grade transitions and penetrations.
Tool — Support Spacing Helper
Result is a study prompt. Always confirm the exact spacing/conditions in the article for your wiring method.
🔎 Practice Tool: Codebook Navigation
Enter an NEC Article number (e.g., 210) to see what it covers.
Glossary Tool
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