Phil maybe I can help here.
406.8
(B) Wet Locations.
(1) 15- and 20-Ampere Outdoor Receptacles. 15- and 20-ampere, 125- and 250-volt receptacles installed outdoors in a wet location shall have an enclosure that is weatherproof whether or not the attachment plug cap is inserted.
That section posted above applies to these types of receptacles.
The run of the mill receptacles that we use in every home.
Those types (15- and 20-ampere, 125- and 250-volt receptacles) must get a bubble cover...no exceptions at all.
This code section below....
406.8(B)(2) Other Receptacles. All other receptacles installed in a wet location shall comply with (a) or (b):
(a)A receptacle installed in a wet location where the product intended to be plugged into it is not attended while in use (e.g., sprinkler system controller, landscape lighting, holiday lights, and so forth) shall have an enclosure that is weatherproof with the attachment plug cap inserted or removed
(b)A receptacle installed in a wet location where the product intended to be plugged into it will be attended while in use (e.g., portable tools, and so forth) shall have an enclosure that is weatherproof when the attachment plug is removed.
applies to any receptacles that are
not 15- and 20-ampere, 125- and 250-volt receptacles.
When they say 'other' they mean other than the 15- and 20-ampere, 125- and 250-volt receptacles mentioned in section 406.8(B)(1).
If you install an outlet like this...
in a wet location than you get to use 406.8(B)(2).
What kind of holiday lights or sprinkler system controller will use an outlet above 20 amps or 250 volts?
I don't know but that is not what is important here.
What is important is that if you installing just a regular old duplex outlet 406.8(B)(!) is the only section that applies and a bubble cover is required in use or not.
You really think Mike H. does not know the rules? :wink: