Hint: An alarming installation
See the answer below.
I spotted this alarm bell dangling off the side of a strip mall building. I’m guessing it is probably part of a fire alarm system. The most obvious problem here is the lack of proper support for the box, which is required to be “rigidly and securely fastened in place” in accordance with the requirements in Sec. 314.23(A). The next problem requires a closer look and may not be as obvious.
The set-screw type of connector used to secure the raceway into the top of the round box is a violation of Sec. 314.15, which requires fittings installed in wet locations (such as this) to be listed for use in wet locations. This set screw connector is not listed for this wet location application.
On a separate note, Sec. 300.7(A) requires raceways that pass from the interior to the exterior of a building to be sealed with an approved material that prevents the circulation of warm air into a colder section of the raceway. This seal could be fiberglass, duct seal, foam or some other type of material that won’t harm the conductor but will minimize the chance of condensation forming inside the raceway.