Return to Table of Contents - EASA Engineering Handbook

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

 

back to table of contents

 

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.

back to table of contents