That was the section mentioned in a recent discussion but it's specifically for underground. Seems kind of strange to require the underground wiring to be more than 5' but not the wiring in this installation. The wiring in question is for the LED pool lights and their associated drivers.
Maybe this scenario hasn't come up to the CMP? Or maybe it has and that's why they specifically wrote "underground".
It seems the chances for shock would be more likely in an underground situation though. I've heard several instances firsthand of people being shocked in a pool, but I've never personally seen this happen.
A few years ago, I kneeled down on a damp sidewalk to glue PVC together that was trenched alongside the sidewalk. When my hands touched the dirt, I felt a very strong shock. The shoulder of the guy kneeling beside me was 2" from mine, and I watched a small arc pass between us.
There was an existing RMC install 3' away from us feeding site lighting, and there was a break in the wire inside. It wasn't enough to trip the breaker, but the RMC was energized and lit us up.
EDIT...... Looking at the pics again..... Are you talking about a crawl space beneath the structure, or that space between the shell and the steel beams it sits on top of?