Find the Answer
It sure looks like these rusty enclosures and equipment were never designed to be installed in a wet location. In addition, take note of how far the mounting board has slipped down from its original mounting position. The original "dog house" has also disappeared because it was exposed to the elements. It's obvious this equipment is showing signs of corrosion and lack of proper maintenance.
Article 100 features the following definition for Location, Wet: "Installations underground or in concrete slabs or masonry in direct contact with the earth; in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather." It also features the following definition for Rainproof: "Constructed, protected, or treated so as to prevent rain from interfering with the successful operation of the apparatus under specified test conditions."
See Table 110.28 for the selection of the proper type of enclosure to be installed outdoors. Section 300.6 also provides guidance on the protection of metal equipment against corrosion and deterioration. Sections 314.40(A) and 314.72(A) provide the construction specifications for corrosion-resistant metal boxes, conduit bodies, and fittings. Section 358.10(B) outlines the corrosion protection requirements when installing electrical metallic tubing.
On a final note, the trash bin also violates working space rules as outlined in 110.26. This could have also caused some damage to the equipment as well.