NEC Article Guide

Master Article 406 - Receptacles

Article 406 covers receptacle ratings, installation, and replacement.

Key Rules and Sections

Code Rule

406.4: General installation.

Code Rule

406.5: Receptacle mounting.

Code Rule

406.6: Attachment plugs.

Code Rule

406.9: Receptacles in damp and wet locations.

Code Rule

406.12: Tamper-resistant receptacles.

Code Rule

406.13: Tamper-resistant in guest rooms.

Sample Questions With Answers

Question 1

According to NEC 2026 Article 210.8(A), GFCI protection is now required for all 125-volt, single-phase, 15- and 20-ampere receptacles installed in which new location?

  1. Laundry rooms
  2. Attached garages
  3. Finished basements
  4. All enclosed porches and decks

Correct Answer: All enclosed porches and decks

Why: NEC 2026 Section 210.8(A)(11) expands GFCI requirements to include all enclosed porches and decks, not just those at grade level

Question 2

Per NEC 2026 Article 210.52(E)(4), what is the maximum distance allowed between a dwelling unit parking space and the required receptacle for electric vehicle supply equipment?

  1. 15 feet
  2. 25 feet
  3. 35 feet
  4. 50 feet

Correct Answer: 25 feet

Why: NEC 2026 Section 210.52(E)(4) requires receptacles within 25 feet of each parking space designated for electric vehicle charging

Question 3

According to NEC 2026 Article 210.12(A), AFCI protection is now required for branch circuits supplying outlets in which additional areas of dwelling units?

  1. Kitchens only
  2. Laundry rooms only
  3. Kitchens and laundry rooms
  4. All habitable rooms and bathrooms

Correct Answer: Kitchens and laundry rooms

Why: NEC 2026 Section 210.12(A) expands AFCI requirements to include kitchens and laundry rooms in addition to previously required areas

Question 4

What is the minimum branch circuit rating required by NEC 2026 Article 210.11(C)(1) for dwelling unit kitchen small appliance circuits?

  1. 15 amperes
  2. 20 amperes
  3. 25 amperes
  4. 30 amperes

Correct Answer: 20 amperes

Why: NEC 2026 Section 210.11(C)(1) requires 20-ampere branch circuits for kitchen small appliance circuits in dwelling units

Question 5

Per NEC 2026 Article 210.8(B)(10), GFCI protection is now required for all 125-volt, 15- and 20-ampere receptacles in commercial building what areas?

  1. Break rooms
  2. Copy rooms
  3. Server rooms
  4. All indoor wet locations

Correct Answer: All indoor wet locations

Why: NEC 2026 Section 210.8(B)(10) expands commercial GFCI requirements to all indoor wet locations beyond the specific areas previously listed

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