SE Rated Protection on transformer secondary (separately derived system)

[PurpleHaze]

Does the NEC require a non-utility transformer (separately dervice system) inside a building to have a service rated disconnect / overcurrent device. For example would a 100A main circuit breaker panelboard on the secondary of a 30kVA transformer be required to be marked as "Suitable for use as Service Entrance" or have some other service rating?

 

[augie47]

Short answer is "not required".
(Under some strange scenario, if your secondary panel was in a separate structure, Service Rated would be required)