Placing an oversized Breaker on a circuit - NEC Compliance

[TacoEngineer]

Let's say we have a 480VAC 33.6Amp load branching off of a 480VAC 50Amp Circuit Breaker.
3/C #6 Conductor, everything is sized correctly for Ampacity and Voltage Drop.

Unfortunately, the existing cable is too short. We do however have a existing panel with a 125Amp breaker we can run the cables to and then bring in a cable to run to the load.

The 50Amp upstream breaker should provide all necessary protection, but the 125Amp breaker downstream sets up a question.
The 125Amp breaker would never trip, we are thinking it would be more of a maintenance switch if anything.
Is there anything in the NEC code that doesn't allow the 125Amp breaker to be used in this setup?
Setup:
Power Source ---> 50Amp Breaker ---> 125Amp Breaker ---> Load

 

[infinity]

Setup:
Power Source ---> 50Amp Breaker ---> 125Amp Breaker ---> Load

Code compliant.

 

[charlie b]

Agreed. But why use the 125 amp breaker at all? Use the panel as a junction box. Of course, you didn't tell us what else is in that panel, so this might not be an option.