Rogue Rooftop Receptacle
This installation violates Sec. 406.9(B)(1) of the Code. When installed in wet locations such as this rooftop, 15A or 20A receptacles must have an enclosure that is weatherproof — even when the attachment plug is inserted. An outlet box hood installed for this purpose must be listed and identified as “extra duty.” This enclosure does not have an “extra-duty” rated cover, and would only be weatherproof when the equipment is unplugged and the cover is closed. This installation is a perfect candidate for installation of a “bubble cover” in order to protect the receptacle and bring it into compliance. The Exception in Sec. 406.9(B)(1) permits a “weatherproof-when-closed” type of cover only if this area is subject to routine high-pressure spray washing, provided the cover is closed during the spray washing. In addition, 125V and 250V non-locking type receptacles are required to be listed as weather-resistant in wet locations.
Another concern I have is the possible lack of GFCI protection. Section 210.8(B)(3) requires this readily accessible rooftop receptacle to be provided with GFCI protection. This protection could be provided through the receptacle or a breaker or another GFCI device. Exception No. 2 would permit GFPE protection instead of GFCI protection if this receptacle was not readily accessible and was installed for snow melting, de-icing, or pipeline/vessel heating purposes.