I just came back from a work trip to NJ. We went to nine supermarkets and in each one I saw this same installation.

This controlled water flow to a sprinkler on the roof that would be activated by temperature to aid the cooling of the refrigeration condensers.

I did not have my camera with me when I saw the worst one with 24" of free air THHN.

[Linked Image]

[Linked Image]

Besides the obvious lack of protection for the conductors apparently the person installing these did not know plain gray 4" sq. switch covers are available, all the ones I saw where these oil burner covers.

Anyone think the plumber did the wiring? [Linked Image]

Bob Badger
Construction & Maintenance Electrician
Massachusetts