Electrical Code & Standards Flashcards

According to NEC 404.2(C), a grounding conductor must be provided at switch locations where switches control lighting in certain locations. Which location specifically triggers this requirement?

Answer: Bathroom

NEC 404.2(C) requires an equipment grounding conductor at switch locations in bathrooms, as well as garages and outdoor locations.

Under NEC 314.16, the volume allowance for a No. 12 AWG conductor used when calculating box fill is:

Answer: 2.25 cubic inches

NEC Table 314.16(B) assigns 2.25 cubic inches per No. 12 AWG conductor for box fill calculations.

Which NEC article covers the installation requirements for transformers rated 600V or less?

Answer: Article 450

NEC Article 450 covers the installation of transformers, including those rated 600V or less.

Per NEC 300.14, at least how much free conductor must be left at each outlet, junction, and switch point?

Answer: 6 inches

NEC 300.14 requires at least 6 inches of free conductor measured from the point where it emerges from the raceway or cable sheath.

What is the NEC term for the low-impedance path intended to facilitate overcurrent device operation in the event of a ground fault?

Answer: Effective ground-fault current path

NEC Article 100 defines the 'effective ground-fault current path' as the intentionally constructed low-impedance path from the fault point to the electrical supply source.

Under NEC 210.8(A), GFCI protection is required for 125-volt, 15- and 20-amp receptacles in which dwelling unit location?

Answer: Crawl space

NEC 210.8(A)(4) requires GFCI protection for receptacles in crawl spaces at or below grade level.

When conductors of different systems (e.g., 120V and 277V) are installed in the same raceway, NEC 300.3(C)(1) requires they be:

Answer: Insulated for the highest voltage present

NEC 300.3(C)(1) requires all conductors in the same raceway to be insulated for the maximum voltage present in that raceway.