Sometime ago I installed Siemens Load Center a 200 amps breaker panel along with upgrading of the meter socket, overhang + cable, and service entrance cable. The 200amps aluminum cable is very rigid and difficult to work with especially in very limited clearance: the cable enter the building through a wall right below the circuit breaker panel as depict in the pic below:
There is no clearance leeway and range to maneuver the cable in order to to get it properly clamped. However, this cable is extremely rigid and heavy duty and could not be disturbed or yanked in any way which would make the clamp irrelevant for most any practical purpose
Only by rerouting SE aluminum cable and drilling another lower hole in the exterior wall would allow another point of entrance with more clearance and thus allowing the reshape of the cable and having it properly clamped as far as appearance goes, but this would be too much work for no gain besides the avoidance of possible hindrances with the inspection. I was wondering whether the NEC would accommodate this type of situation.
I am considering redoing this segment (from bottom of meter box to breaker panel) of the SE cable and replacing it by copper and conduit instead of this type of aluminum SE cable. But I would imagine that this type of situation can crop up and that NEC should have some type of provision to deal with it. Besides the clamps server almost no function in this situation.