Lesson 3 Applied Codeology: Navigating the 2023 NEC Flashcards

Vocabulary-style flashcards covering requirements for conduits, boxes, conductor sizes, and wiring methods based on the 2023 National Electrical Code (NEC) Lesson 3 quiz.

Minimum length of a pull box (straight run)

For a straight run of five $4 ext{"}$ conduits containing $2 ext{ AWG}$ copper conductors, the minimum length is $32 ext{"}$ per NEC $314.28(A)(1)$.

Free conductor length for splicing

In a $12 ext{-inch}$ by $12 ext{-inch}$ junction box, there shall be at least $6 ext{"}$ of free conductor left for splicing per NEC $300.14$.

Flat conductor cable

A wiring method that is not recognized for use as feeder or branch-circuit conductors per NEC $324.10(A)$.

Maximum hole size in a wood stud

For a nominal $1.5 ext{-inch}$ by $3.5 ext{-inch}$ wood stud without additional protection, the largest size hole permitted is $1 ext{"}$ per NEC $300.4(A)(1)$.

Type MI cable strapping interval

This cable type is required to be strapped at intervals not exceeding $6'$ per NEC $332.30$.

Cellular metal floor raceway conductor limit

Generally, no conductor larger than $1/0 ext{ AWG}$ shall be installed in this type of raceway per NEC $374.20$.

Insulated conductor operating temperature

No conductor shall be used in a manner where its operating temperature exceeds that designated for the type of insulated conductor involve per NEC $310.14(A)(3)$.

Article 358

The Chapter 3 article in the NEC that covers the requirements for electrical metallic tubing.

Minimum-size parallel aluminum feeders

The smallest size aluminum feeder conductors permitted to be installed in parallel is $1/0 ext{ AWG}$ per NEC $310.10(G)(1)$.

Damp locations

Locations protected from weather and not subject to saturation with water or other liquids, but subject to moderate degrees of moisture.

Smallest single current-carrying conductor in cable tray

In an industrial establishment, the smallest size permitted is $1/0 ext{ AWG}$ per NEC $392.10(B)(1)(a)$.

Pull box length for conductors $4 ext{ AWG}$ or larger

Where conductors are pulled straight through, the box length shall be at least $8$ times the trade diameter of the largest raceway per NEC $314.28(A)(1)$.

Flush device enclosure design

A box used to enclose flush devices must be designed so that devices are completely enclosed on the back and sides per NEC $314.19$.

6 AWG THW copper conductor ampacity

When installed in a raceway with not more than three current-carrying conductors, it can carry $65 ext{ A}$ continuously per Table $310.16$.

Integrated gas-spacer cable

A wiring method that is not permitted for use as an interior wiring method per NEC $326.12$.

Minimum covering for 4,160-volt feeder

For nonmetallic conduit identified for direct burial without concrete encasement, the minimum covering is $18 ext{"}$ per Table $305.15(A)$.