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  • ⚡ Code Corner:🔸 NEC 300.4(B)(1) – Protection from Physical Damage

⚡ Code Corner:🔸 NEC 300.4(B)(1) – Protection from Physical Damage

Sharpen your knowledge with a quick dive into the NEC.

Author

Chris Martinez
June 05, 2025

📘 What NEC 300.4(B)(1) Says:

When nonmetallic-sheathed cable, MC cable, or other wiring methods pass through holes in wood framing members (like studs) and those holes are less than 1 ¼ inches from the edge of the wood, the cables must be protected from nails, screws, or anything else that might puncture them.

❓ Quick Code Quiz:

True or False?

❓ Question:
You’re running NM cable through a 2x4 stud wall. The hole you drilled is 1 inch from the edge of the stud. What must you do to comply with NEC 300.4(B)(1)?

A) Nothing — the cable is fine as is
B) Cover the hole with electrical tape
C) Install a steel plate at least 1/16" thick to protect the cable
D) Move the hole closer to the edge so it’s easier to staple

Answer below 👇

✅ Answer:

C) Install a steel plate at least 1/16" thick to protect the cable