FMC connects a junction box to a luminaire within an accessible ceiling. Applying the 2023 NEC 348.30(A) Exception No. 4 support allowance, what maximum length may extend from the last point where the raceway is securely fastened?

Electrician exam practice question · Wiring Methods & Materials

FMC connects a junction box to a luminaire within an accessible ceiling. Applying the 2023 NEC 348.30(A) Exception No. 4 support allowance, what maximum length may extend from the last point where the raceway is securely fastened?

A18 inches
B3 feet
C4½ feet
6 feet

Where to look it up

https://docinfofiles.nfpa.org/files/AboutTheCodes/70/70_A2025_NEC_P08_FD_PIResponses.pdf

Why D is correct

This accessible-ceiling connection allowance is 6 feet. It is distinct from the luminaire-tap allowance and from the separate flexibility exception, whose length depends on trade size. Do not memorize 3 feet as a limit for every flexible connection. Source: unchanged 2023 baseline in NFPA Public Input 2255, PDF page 174 (printed 149). https://docinfofiles.nfpa.org/files/AboutTheCodes/70/70_A2025_NEC_P08_FD_PIResponses.pdf

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FMC connects a junction box to a luminaire within an accessible ceiling. Applying the 2023 NEC 348.30(A) Exception No. 4 support allowance, what maximum length may extend from the last point where the raceway is securely fastened?

FMC connects a junction box to a luminaire within an accessible ceiling. Applying the 2023 NEC 348.30(A) Exception No. 4 support allowance, what maximum length may extend from the last point where the raceway is securely fastened?

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