NEC 210: Branch Circuits
What This Article Covers
NEC Article 210 covers the requirements for branch circuits — the wiring from the final overcurrent device protecting the circuit to the outlets. It establishes branch-circuit ratings, the loads they can serve, and the receptacle and lighting outlet requirements that apply to dwelling and non-dwelling occupancies.
Key Requirements
- Branch-circuit ratings: 15, 20, 30, 40, and 50 amperes (210.3)
- Conductors must have ampacity not less than the rating of the circuit
- GFCI protection required for receptacles in specified locations (210.8)
- AFCI protection required for most dwelling unit branch circuits (210.12)
- Small-appliance branch circuits in dwellings: minimum two 20A circuits in kitchen and dining areas (210.11(C)(1))
- Required receptacles in dwelling units, including outdoor and garage outlets
- Lighting outlet requirements in each habitable room and certain non-habitable spaces
Common Field Applications
- Sizing a kitchen counter receptacle circuit
- Determining whether a bathroom needs GFCI (yes — 210.8(A)(1))
- Choosing between a 15A and a 20A circuit for a small appliance
Common Mistakes & Inspection Failures
- Putting receptacles and lighting on the same 20A small-appliance circuit
- Forgetting AFCI protection on bedroom outlets
- Using 14 AWG on a 20A branch circuit
Related NEC Articles
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What does NEC 210 cover?
NEC Article 210 covers the requirements for branch circuits — the wiring from the final overcurrent device protecting the circuit to the outlets. It establishes branch-circuit ratings, the loads they can serve, and the receptacle and lighting outlet requirements that apply to dwelling and non-dwelling occupancies.
What are the key requirements of NEC 210?
Key requirements include: Branch-circuit ratings: 15, 20, 30, 40, and 50 amperes (210.3); Conductors must have ampacity not less than the rating of the circuit; GFCI protection required for receptacles in specified locations (210.8). See the full requirements list on this page.
What are common mistakes with NEC 210?
Putting receptacles and lighting on the same 20A small-appliance circuit Forgetting AFCI protection on bedroom outlets Using 14 AWG on a 20A branch circuit
Related Resources
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IBEW Local 134 Journeyman Electrician · Licensed Electrical Contractor
Michael is a licensed electrical contractor and IBEW Local 134 journeyman with years of field experience. He built Sparky AI after ChatGPT gave him wrong NEC code information on a job — costing him $800 in callbacks. Every answer in Sparky AI is verified against the actual NEC.