NEC Quiz: Article 314, Part 6 Answers

by Mark Lamendola

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  1. At least twice the cross-sectional area of the conduit or tubing to which it is attached [314.16(C)(1)].
     

  2. Yes, but only if said body is durably marked (by the manufacturer) with its volume [314.16(C)(2)]. And it cannot be a short-radius body [314.16(C)(3)].
     

  3. Those would be Table 314.16(A) and Table 314.16(B). The first tells you the minimum volume and maximum number of conductors for a given box trade size. The second tells you the volume allowance per conductor.
     

  4. They must be adequately closed 314.17(A).
     

  5. They must be suitable for the lowest temperature-rated conductor entering the box [314.17(C)]. Also, be careful which temperature columns you use in those ampacity tables. The lowest temperature rating of any conductor brings down the temperature rating of all conductors enclosed in a box or raceway.