NEMA
enclosure
type no. |
NEMA definition |
IEC
enclosure
class |
1 |
General-purpose. Protects against dust, light,
and indirect splashing but is not dust-tight; primarily prevents
contact with live parts; used indoors and under normal atmospheric
conditions. |
IP10 |
2 |
Drip-tight. Similar to Type 1 but with addition
of drip shields; used where condensation may be severe (as
in cooling rooms and laundries). |
IP11 |
3 and 3S |
Weather-resistant. Protects against weather
hazards such as rain and sleet; used outdoors on ship docks,
in construction work, and in tunnels and subways. |
IP54 |
3R |
Intended for outdoor use. Provides a degree
of protection against falling rain and ice formation. Meets
rod entry, rain, external icing, and rust-resistance design
tests. |
IP14 |
4 and 4X |
Watertight (weatherproof). Must exclude at least
65 GPM of water from 1-in. nozzle delivered from a distance
not less than 10 ft for 5 min. Used outdoors on ship docks,
in dairies, and in breweries. |
IP56 |
5 |
Dust-tight. Provided with gaskets or equivalent
to exclude dust; used in steel mills and cement plants. |
IP52 |
6 and 6P |
Submersible. Design depends on specified conditions
of pressure and time; submersible in water; used in quarries,
mines, and manholes. |
IP67 |
7 |
Hazardous. For indoor use in Class I, Groups
A, B, C, and D environments as defined in the NEC. |
— |
8 |
Hazardous. For indoor and outdoor use in locations
classified as Class I, Groups A, B, C, and D as defined in
the NEC. |
— |
9 |
Hazardous. For indoor and outdoor use in locations
classified as Class II, Groups E, F, or G as defined in the
NEC. |
— |
10 |
MSHA. Meets the requirements of the Mine Safety
and Health Administration, 30 CFR Part 18 (1978). |
— |
11 |
General-purpose. Protects against the corrosive
effects of liquids and gases. Meets drip and corrosion-resistance
tests. |
— |
12 and 12K |
General-purpose. Intended for indoor use, provides
some protection against dust, falling dirt, and dripping noncorrosive
liquids. Meets drip, dust, and rust resistance tests. |
IP52 |
13 |
General-purpose. Primarily used to provide protection
against dust, spraying of water, oil, and noncorrosive coolants.
Meets oil exclusion and rust resistance design tests. |
IP54 |