300.19 (A) Supporting Conductors in Vertical Raceways

[Carultch]

Long vertical run - agreed.

shorter vertical run - it happens all the time with little issues, to small and large conductors.

So is Table 300.19(A) the definition of the cutoff for a "shorter vertical run" vs a "long vertical run"?

 

[kwired]

So is Table 300.19(A) the definition of the cutoff for a "shorter vertical run" vs a "long vertical run"?

It is the best thing NEC has for that purpose.

First sentence in 300.19(A): "Conductors in vertical raceways shall be supported if the vertical rise exceeds the values in Table 300.19(A)"