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Starter Enclosures
Type NEMA Enclosure
1 General Purpose – Indoor
2 Driproof – Indoor
3 Dusttight, Raintight, Sleettight – Outdoor
3R Raintight, Sleet Resistant – Outdoor
3S Dusttight, Raintight, Sleettight – Outdoor
4 Watertight, Dusttight, Sleet Resistant-Indoor & Outdoor
4X Watertight, Dusttight, Corrosion-Resistant – Indoor & Outdoor
5 Dusttight, Drip-Proof–Indoor
6 Occasionally Submersible, Watertight, Sleet Resistant – Indoor & Outdoor
6P Watertight, Sleet Resistant-Prolonged Submersion – Indoor & Outdoor
12 Dusttight and Driptight – Indoor
12K Dusttight and Driptight, with Knockouts – Indoor
13 Oiltight and Dusttight – Indoor
Hazardous Location Starters
7 Class I, Group A, B, C or D Hazardous Locations – Indoor
8 Class I, Group A, B, C or D Hazardous Location – Indoor & Outdoor
9 Class II, Group E, F or G Hazardous Locations – Indoor
10 Requirements of Mine Safety and Health Administration

 

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Conversion of NEMA Type Numbers to IEC Classification Designations
(Cannot be used to convert IEC Classification Designations to NEMA Type Numbers)

NEMA
Enclosure
Type Number
IEC Enclosure
Classification
Designation
1
2
3
3R
3S
IP10
IP11
IP54
IP14
IP54
4 and 4X
5
6 and 6P
12 and 12K
13
IP56
IP52
IP67
IP52
IP54

Note: This comparison is based on tests specified in IEC Publication 529.
Reference: Information in the above tables is based on NEMA Standard 250-1991.

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