There is this also;
406.9(B) Wet Locations.
(1) 15- and 20-Ampere Receptacles in a Wet Location.
15- and 20-ampere, 125- and 250-volt receptacles installed in
a wet location shall have an enclosure that is weatherproof
whether or not the attachment plug cap is inserted. For other
than one- or two-family dwellings, an outlet box hood installed
for this purpose shall be listed, and where installed on
an enclosure supported from grade as described in 314.23(B)
or as described in 314.23(F) shall be identified as ?extra-duty.?
All 15- and 20-ampere, 125- and 250-volt nonlocking-type
receptacles shall be listed weather-resistant type.
Informational Note No. 1: Requirements for extra-duty
outlet box hoods are found in ANSI/UL 514D-2000, Cover
Plates for Flush-Mounted Wiring Devices.
Pete