Service disconnects wrapper
Why you care (60 seconds)
Service disconnects are a primary safety control. Inspectors check location, access, and grouping because they affect emergency shutdown and serviceability.
Where people lose time
- Locating the disconnect in a spot that fails accessibility rules.
- Exceeding the allowed number of disconnects for a service.
- Confusing service disconnect rules with feeder disconnect rules.
This is
The rule in plain language
Provide a service disconnecting means that is accessible, properly located, and grouped so the service can be safely shut down.
When it applies
Any time you install or verify service equipment for a building or structure.
What you must do (checklist)
- Identify the service point and equipment classification.
- Place the disconnect where it is readily accessible.
- Keep the disconnects grouped and labeled.
- Verify the number of disconnects stays within limits.
Quick examples
- Group service disconnects in a single location for quick identification.
- Label each disconnect to show what it controls.
This is not
Common misreads
- Treating a feeder disconnect as the service disconnect.
- Assuming location is flexible without checking accessibility rules.
What it doesn't cover
- Detailed service sizing or load calculation methods.
- Special requirements for emergency systems.
False friends
- A nearby disconnect is not a service disconnect unless it is on the service.
Exceptions & edge cases
- Some occupancies have additional disconnecting requirements.
- Multiple service sources may introduce extra grouping rules.
Cross-references (NEC map)
- Primary: 230.70, 230.71
- Secondary: 230.72
Exam traps
- Missing the difference between service equipment and downstream panels.
- Choosing an answer that ignores grouping requirements.
Field notes
- Confirm service disconnect location during layout, not after rough-in.
- Photograph labels and grouping for inspection submittals.
AHJ / Local amendments notes (placeholder)
- Add local amendments or interpretations here.
Revision notes
- Draft wrapper created for service disconnect fundamentals.