Ground-fault protection wrapper
Why you care (60 seconds)
Ground-fault protection of equipment can be required at services and feeders. Missing it is a common inspection issue on larger installations.
Where people lose time
- Confusing GFP for equipment with GFCI for personnel.
- Forgetting GFP requirements at higher service ratings.
- Misapplying settings without coordination considerations.
This is
The rule in plain language
Provide equipment-level ground-fault protection where required so faults clear before causing extensive damage.
When it applies
Services and feeders above specified ratings or as required by the code.
What you must do (checklist)
- Determine if service or feeder ratings trigger GFP requirements.
- Choose listed equipment with GFP functionality.
- Set and document trip settings per listing and design intent.
Quick examples
- A large service disconnect may require GFP even if branch circuits do not.
- GFP settings should align with downstream coordination.
This is not
Common misreads
- Treating GFP as a substitute for GFCI.
- Assuming GFP is optional at higher service ratings.
What it doesn't cover
- Detailed coordination studies.
- Specialized industrial protection schemes.
False friends
- A ground fault on equipment is not the same as personnel protection needs.
Exceptions & edge cases
- Certain occupancies or system types can modify GFP requirements.
- Some systems have alternative protection methods when documented.
Cross-references (NEC map)
- Primary: 230.95
- Secondary: 215.10
Exam traps
- Mixing GFCI and GFP triggers.
- Missing GFP requirements on high-amperage services.
Field notes
- Document GFP settings for inspection and future maintenance.
- Confirm GFP testing procedures after commissioning.
AHJ / Local amendments notes (placeholder)
- Add local amendments or interpretations here.
Revision notes
- Draft wrapper created for ground-fault protection fundamentals.