In a retail store, a new branch circuit is being installed for lighting fixtures. The ceiling height is 12 feet. Which type of wiring method is required for this installation?
- Concealed wiring in ceiling joists
- BExposed wiring on ceiling joists
- CConcealed wiring in ceiling plenum
- DExposed wiring in ceiling plenum
Exam tip
Always check the code requirements for the appropriate wiring method based on the ceiling height and the type of installation.
Why A is correct
According to 2026 NFPA 70 NEC Article 348.4, concealed wiring in ceiling joists is the required method for lighting fixtures in a ceiling height of 12 feet or less. Exposed wiring is not allowed in ceiling joists. Options b, c, and d are not the correct methods for this installation.