Is there a max length for this?

Reason for the question is this:

From a SDS, 480x208/120Y transformer, I need to go to building steel with the GEC, but the transformer is in the middle of the floor.

Is there a max length that it can be, and does it have to be protected from damage in conduit, or can it be supported, say with ty-wraps, to the feeder conduit?

Dnk....