NEC 2008
406.8 Receptacles in Damp or Wet Locations.
(A) Damp Locations. ... A receptacle shall be considered to be in a location protected from the weather where located under roofed open porches, canopies, marquees, and the like, and will not be subjected to a beating rain or water runoff. All 15- and 20-ampere, 125- and 250-volt nonlocking receptacles shall be a listed weather-resistant type.
NEC 2008
Article 100 Definitions
Location, Damp. Locations protected from weather and not subject to saturation with water or other liquids but subject to moderate degrees of moisture. Examples of such locations include partially protected locations under canopies, marquees, roofed open porches, and like locations, and interior locations subject to moderate degrees of moisture, such as some basements, some barns, and some coldstorage warehouses.
Location, Dry. A location not normally subject to dampness or wetness. A location classified as dry may be temporarily subject to dampness or wetness, as in the case of a building under construction.
Location, Wet. Installations underground or in concrete slabs or masonry in direct contact with the earth; in locations subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected locations exposed to weather.
Que tampa de saída externa é exigida pela NEC?
Existem dois tipos de tampas de saída usadas em tomadas externas. O primeiro tipo é para locais úmidos que cobrem a tomada quando não estão em uso:
E o segundo tipo é para locais úmidos que permitem que a saída seja vedada durante o uso:
Como o wet vs húmido é definido pela NEC para diferenciar quando uma capa é necessária sobre outra?
NEC 406.8 Receptacles in Damp or Wet Locations: "A receptacle installed outdoors in a location protected from the weather or in other damp locations shall have an enclosure for the receptacle that is weatherproof when the receptacle is covered (attachment plug cap not inserted and receptacle covers closed).". And "receptacles installed in a wet location shall have an enclosure that is weatherproof whether or not the attachment plug cap is inserted."
2 respostas
Se não houver nada conectado em mais de 3 hiours (uso contínuo), uma capa à prova de tempo regular é adequada para locais úmidos, e as tampas de bolhas se quebram.
Tags electrical exterior