Hint: Exterior ENT installation
That loop of blue raceway in the photo is Electrical Nonmetallic Tubing (ENT). ENT is often referred to a “Smurf Tube” due its blue coloring matching the color of the Smurf cartoon characters. Installing ENT on the exterior of a building is not one of the wiring methods permitted in Sec. 225.10 for outside branch circuits and feeders. I was only able to see this from the street level, so I am not 100% sure what this ENT is being used for, however, Sec. 362.12(7) prohibits ENT from being installed where it is exposed to the direct rays of the sun unless it is identified as being sunlight resistant. I’m not sure if there is any ENT that is identified as being sunlight resistant. Where nonmetallic equipment is exposed sunlight, Sec. 300.6(C)(1) requires raceways, cable trays, cablebus, auxiliary gutters, boxes, cables with a nonmetallic outer jacket and internal metal armor or jacket, cable sheathing, cabinets, enclosures, elbows, couplings, nipples, fittings, supports, and support hardware to be either listed as being sunlight resistant or identified as being sunlight resistant.
