Came up with a question on a generator/transfer switch installation that we see frequently in this area. The contractor used a Reliance PB30 flanged inlet (125/250V, 3-Pole 4-Wire Grounding) with a hinged, gasketed, weatherproof cover for the generator connection to the transfer switch. Makes for a nice set-up. In discussing the installation with the contractor, I wondered whether or not the flanged inlet would require a cover which was weathertight while in use per 406.8(B)(2)(a) (2002 Code). After thinking it over for a while, I don't think it does. A flanged inlet is not a receptacle and U.L. lists them under Attachment Plugs. So, my thinking is that 406.8(B)(2)(a) doesn't apply. Am I thinking correctly on this one, or am I missing something?
