Cable support and protection wrapper
Why you care (60 seconds)
Proper support and protection prevents damaged insulation and failed rough inspections. It also keeps wiring accessible and safe over the life of the installation.
Where people lose time
- Missing required support intervals along runs.
- Forgetting protection where cables pass through framing.
- Assuming all cable types have the same support rules.
This is
The rule in plain language
Support cables at required intervals and protect them from physical damage where needed, using methods allowed for the wiring type.
When it applies
Whenever cables are installed in building framing, raceways, or exposed runs.
What you must do (checklist)
- Follow support spacing requirements for the wiring method used.
- Protect cables where they are exposed to physical damage.
- Use proper fittings at entries and transitions.
- Verify burial depth when cables are underground.
Quick examples
- A run across studs needs support and protection at the prescribed intervals.
- Underground segments must meet burial depth requirements.
This is not
Common misreads
- Treating stapling as optional if the cable is "tight".
- Ignoring protection in garages or unfinished spaces.
What it doesn't cover
- Raceway fill calculations.
- Specialty wiring methods with their own dedicated rules.
False friends
- A fastened cable is not necessarily protected from physical damage.
Exceptions & edge cases
- Some cable types allow different support methods or intervals.
- Physical damage exposure depends on the location and use.
Cross-references (NEC map)
- Primary: 334.30, 300.4
- Secondary: 300.5
Exam traps
- Picking support intervals from the wrong wiring method.
- Forgetting to protect cables where they pass through framing.
Field notes
- Carry a quick reference for support intervals by cable type.
- Add nail plates where framing penetrations are close to the surface.
AHJ / Local amendments notes (placeholder)
- Add local amendments or interpretations here.
Revision notes
- Draft wrapper created for cable support and protection fundamentals.