Perhaps a more detailed description is in order for the "out of towners."
Both pictures use PVC pipe and fittings. The white ones are plumbing (cold water) fittings, and the gray ones are intended for electrical use.
Common to both pics are exceptionally clean joints. Even clear PVC cement will smear printed marks on the pipes. I suspect that most of the connections have no glue on them at all.
The box in the first pic is probably made of zinc or aluminum, and intended for outdoor use. Such boxes typically have threaded openings machined into them. Our code requires boxes to be supported- it appears the intent is to simply stick the box atop the threaded vertical fitting; that would leave the box unsupported.
"Bell" is a brand name of such boxes. For similar applications, a much stouter box is used in industrial locations. The heavy cast boxed are generically called "FS" boxes. This link should show you some of the heavier industrial boxes: http://www.emersonindustrial.com/en...-device-box/fs-fd-box/Pages/default.aspx
. Parts are not interchangeable.
The "C" body can also be used to make a splice. I suspect the "designer" planned to connect a photocell, but had to use a box when the tails on the photocell proved too short.
Use of plumbing fittings on electrical work is forbidden, as the fittings do not have the required bending radius for wires; nor can you pull wires through them. Such an installation would need to have the fittings slipped over the wires one at a time; we are required to assemble the conduit completely, and THEN pull the wires in. Naturally, there are no 'approvals' for the plumbing fittings either.
In the second pic, I believe the "slant" of the building is a creation of the camera lens.
The box in the second pic is made of PVC, and is designed to be glued directly to PVC conduit. The top is not open- it is designed to be used with either 1/2" or 3/4" conduit, with the necessary center parts knocked out with a hammer as needed.
We would require an additional strap on the vertical part of that conduit run.
Since you see three 90-degree bends in quick sequence, there are concerns about the run having more than the maximum 360 degrees of bends between pull points. A cleaner install would have replaced the third bend with an LB or LR conduit body. That would have provided a pull point, as well as let you run the pipe right next to the face of the step.
A better plan might have been to run the pipe on the face of the top step- eliminating two bends. Not knowing the rest of the run, I can only guess.