CEP National Electrical Code (NEC) & Code Compliance Flashcards

NEC Article 406 regulates receptacles, cord connectors, and attachment plugs. What is required when replacing a non-grounding-type receptacle in an older installation where no grounding means exists?

Answer: Replace with another non-grounding receptacle or a GFCI receptacle

NEC 406.4(D)(2) permits replacing a non-grounding receptacle with a GFCI-type and labeling it 'No Equipment Ground'.

Under NEC 300.3(B), all conductors of the same circuit must be contained in the same raceway, cable, or trench primarily to:

Answer: Minimize inductive heating of ferrous metal enclosures

Grouping all circuit conductors together cancels the magnetic fields and prevents inductive heating in metal conduit or enclosures.

NEC 110.26 specifies working space in front of electrical equipment. For a 480V panelboard with exposed live parts on one side, what is the minimum depth of working space (Condition 2)?

Answer: 4 feet

NEC Table 110.26(A)(1) requires 4 feet of working clearance for 151–600V equipment under Condition 2 (grounded surfaces opposite live parts).

Which NEC article specifically addresses wiring for health care facilities, including patient care areas?

Answer: Article 517

NEC Article 517 covers electrical installations in health care facilities, including essential electrical systems and patient care areas.

Per NEC 314.28, what is the minimum inside dimension of a pull box installed on a straight pull of 3-inch conduit?

Answer: 24 inches

NEC 314.28(A)(1) requires that for straight pulls the box length be at least eight times the trade size of the largest conduit, so 8 × 3 = 24 inches.

According to NEC 240.4(D), small conductors of 14 AWG copper must be protected at a maximum overcurrent device rating of:

Answer: 15 amperes

NEC 240.4(D)(3) limits the overcurrent protection for 14 AWG copper conductors to a maximum of 15 amperes.