15d • General discussion
Key word Hierarchy
When looking at a question, certain subjects trump others. If there’s a special location or condition mentioned then that’s your key word. If not then see if it mentions a type of equipment. And go down the list. Here is a breakdown of the hierarchy and where to look:
NEC Question Hierarchy
1. Special Occupancy / Equipment / Condition
(Chapters 5, 6, 7)
- Hazardous Locations
- Healthcare Facilities
- Fire Pumps
- Emergency Systems
- Solar
- EV Charging
2. Equipment
(Chapter 4)
- Motors
- Transformers
- Generators
- Receptacles
- Switches
- Panelboards
3. Wiring Methods & Materials
(Chapter 3)
- EMT
- RMC
- IMC
- PVC
- FMC
- LFMC
- MC Cable
- AC Cable
- NM Cable
- Conductors
- Boxes
- Raceways
4. General Subject
(Mostly Chapters 2 & 3)
- Ampacity
- Grounding
- Bonding
- Box Fill
- Conduit Fill
- Load Calculations
- Services
- Feeders
5. Detail
- Connector
- Coupling
- Strap
- Bushing
- Locknut
- Fitting
- Support
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Key word Hierarchy
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