UFC 3 -520-01
June 10, 2002
Table 8-2. NEMA Enclosure Types
NEMA Type
Description
Application
NEMA 1 (vented)
General purpose. Primarily used to provide a degree of
Indoor
protection against contact with the enclosed equipment or
locations where unusual service conditions do not exist.
NEMA 1
General purpose against limited amounts of falling dirt.
Indoor
Primarily used to provide a degree of protection against
contact with the enclosed equipment or locations where
unusual service conditions do not exist.
NEMA 2 (vented)
General purpose and drip-proof. Provides protection
Indoor
against limited amounts of falling water and dirt. Not dust-
tight.
NEMA 2
General purpose, drip -proof and dust-proof. Provides
Indoor
protection against limited amounts of falling water and dirt.
NEMA 3
Dust tight, rain tight, and sleet/ice resistant.
Outdoor
NEMA 3R (vented)
Rain-proof, sleet/ice resistant. Vented version is not dust-
Outdoor
tight.
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
Indoor/Outdoor
windblown dust and rain, splashing water, and hose directed
water. Undamaged by ice formation.
NEMA 4X
Water tight, dust tight, corrosion resistant. Provides
Indoor/Outdoor
protection against corrosion, windblown dust and rain,
splashing water, and hose directed water. Undamaged by
ice formation.
NEMA 5
General purpose against dust and falling dirt
Indoor
NEMA 6
Temporary submersion, dust tight, rain tight, sleet/ice
Indoor/Outdoor
resistant.
NEMA 6P
Prolonged submersion, dust tight, rain tight, sleet/ice
Indoor/Outdoor
resistant.
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 -
Indoor
corrosive liquids.
NEMA 13
Oil tight, dust tight, non-corrosive coolants.
Indoor
8-6
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