UFC 3-520-01
June 10, 2002
8-6
Table 8-2. NEMA Enclosure Types
NEMA Type
Description
Application
NEMA 1 (vented)
General purpose. Primarily used to provide a degree of
protection against contact with the enclosed equipment or
locations where unusual service conditions do not exist.
Indoor
NEMA 1
General purpose against limited amounts of falling dirt.
Primarily used to provide a degree of protection against
contact with the enclosed equipment or locations where
unusual service conditions do not exist.
Indoor
NEMA 2 (vented)
General purpose and drip-proof. Provides protection
against limited amounts of falling water and dirt. Not dust-
tight.
Indoor
NEMA 2
General purpose, drip-proof and dust-proof. Provides
protection against limited amounts of falling water and dirt.
Indoor
NEMA 3
Dust tight, rain tight, and sleet/ice resistant.
Outdoor
NEMA 3R (vented) Rain-proof, sleet/ice resistant. Vented version is not dust-
tight.
Outdoor
NEMA 3R
Rain-proof, sleet/ice resistant.
Outdoor
NEMA 3S
Dust tight, rain tight, and sleet/ice proof.
Outdoor
NEMA 4
Water tight, dust tight. Provides protection against
windblown dust and rain, splashing water, and hose directed
water. Undamaged by ice formation.
Indoor/Outdoor
NEMA 4X
Water tight, dust tight, corrosion resistant. Provides
protection against corrosion, windblown dust and rain,
splashing water, and hose directed water. Undamaged by
ice formation.
Indoor/Outdoor
NEMA 5
General purpose against dust and falling dirt
Indoor
NEMA 6
Temporary submersion, dust tight, rain tight, sleet/ice
resistant.
Indoor/Outdoor
NEMA 6P
Prolonged submersion, dust tight, rain tight, sleet/ice
resistant.
Indoor/Outdoor
NEMA 7
Class 1, Division 1, Groups A, B, C, or D.
Indoor hazardous
locations
NEMA 8
Class 1, Division 1, Groups A, B, C, or D.
Indoor/Outdoor
hazardous locations
NEMA 9
Class 2, Division 1, Groups E, F, or G.
Indoor hazardous
locations
NEMA 10
Mining enforcement safety requirements.
NEMA 11
Corrosion resistant by oil immersion.
Indoor
NEMA 12
Industrial use, drip tight, dust tight, non-corrosive liquids.
Indoor
NEMA 12K
Industrial use with knockouts, drip tight, dust tight, non-
corrosive liquids.
Indoor
NEMA 13
Oil tight, dust tight, non-corrosive coolants.
Indoor