Eaton Crouse-Hinds EIH21 Instrument Enclosure - Hazardous

Part Number: EIH22 2 MF
Eaton Crouse-Hinds logo
Manufacturer
Eaton Crouse-Hinds
Part number
EIH22 2 MF
Category

Quick Summary

EIH21 instrument enclosure protects electrical equipment in hazardous locations for field instruments in harsh industrial settings. In the real world, electricians face limited access, corrosion, and compliance paperwork when selecting enclosures for classified areas. This model supports NEC/CEC hazardous ratings and NEMA configurations, including Class I, II, and III divisions and ratings such as 3, 4, 4X, 7, and 9, helping you track certification requirements. Built with copper-free aluminum and a glass cover, it blends durability with visibility, while its 2 inch cover opening and 3/4 inch trade size simplify wiring and installation. For teams seeking reliable protection with clear fault diagnosis, this enclosure reduces downtime and accelerates project timelines.

Product Information

Extended Description

EIH22 2 MF Eaton Crouse-Hinds: Eaton Crouse-Hinds series EIH instrument enclosure, 4" cover opening, Dome cover, Copper-free aluminum, Additional 3/4" drilled and tapped opening in external boss, cast mounting feet, 3/4" trade size
Product Name
Eaton Crouse-Hinds series EIH instrument enclosure
Catalog Number
EIH22 2 MF
Product Length/Depth
5.25 in
Product Height
6.54 in
Product Width
5.25 in
Product Weight
3 lb
UPC
782274669021
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class III Class I, Division 2 Class II, Division 1 Class II, Division 2 Class I, Division 1
NEMA Rating
9 3 7 4X 4
Trade size
3/4"
Cover type
Dome
Cover opening size
4 in
Material
Copper-free aluminum
Special features
Additional 3/4" drilled and tapped opening in external boss, cast mounting feet
Crouse-Hinds series EIH and EIHT Explosionproof Instrument Enclosures catalog page EIH and EIHT Explosionproof Instrument Enclosures UL certification (Instrument Housing) EIH and EIHT Explosionproof Instrument Enclosures UL certification (Instrument Housing) EIH and EIHT Explosionproof Instrument Enclosures UL certification (Instrument Housing) IF 1458 - Type EIH and EIHT Declaration of Manufacturer IF 1458 - Type EIH and EIHT Declaration of Manufacturer Eaton Specification Sheet - EIH22 2 MF
Feature: Glass cover provides clear visibility of internal indicators and status LEDs, enabling quicker fault diagnosis and reduced maintenance cycles. Business impact: Faster troubleshooting translates to lower downtime and improved process uptime. Application: Ideal for instrument panels in control rooms and field cabinets where visibility matters in hazardous locations. Feature: Copper-free aluminum construction delivers corrosion resistance with lighter weight, improving handling during installation and long-term durability in harsh environments. Business impact: Lower maintenance costs and easier retrofits in offshore, chemical, and power generation facilities. Application: Suitable for outdoor enclosures and corrosive atmospheres in Class I/II hazardous areas. Feature: 2 in cover opening combined with a 3/4 in trade size provides accessible wiring and straightforward conduit integration. Business impact: Reduces install time and simplifies field termination for motor and instrumentation panels. Application: Serviceable enclosures for process instrumentation and control wiring in industrial plants. Feature: NEMA ratings 3, 4, 4X, 7, 9 and NEC/CEC classifications ensure robust protection against water ingress, dust, corrosion, and blast events. Business impact: Compliance assurance and risk reduction across multiple regulatory regimes. Application: Suitable for indoor and outdoor hazardous location installations in oil, gas, and chemical processing. Feature: Glass-covered view and rugged gasket interfaces improve sealing integrity without compromising accessibility. Business impact: Maintains enclosure integrity under pressure and vibration while enabling quick visual checks. Application: Control cabinets and instrumentation enclosures in vibration-prone environments. Feature: EIH21 catalog and installation resources, including IF 1179 guidance, streamline procurement and on-site commissioning. Business impact: Shorter project cycles and fewer field queries. Application: Engineering approvals and technician training for hazardous location installations.

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FAQs

To install the EIH21, mount the enclosure on a suitable surface using the provided mounting holes, verify the door/cover seals are intact, and route wiring through the 3/4 in trade size entries. Use the 2 in cover opening to access terminal blocks and follow the IF1179 installation sheet for torque and enclosure continuity. Ensure the copper-free aluminum frame remains corrosion-free during installation.
Yes. The EIH21 is designed for NEC/CEC hazardous locations, including Class I Division 1 and Division 2, Class II Division 1 and Division 2, and Class III. It also carries NEMA ratings 3, 4, 4X, 7, and 9, supporting a wide range of indoor and outdoor hazardous environment applications. Always verify local codes and exact division/subdivision requirements for your installation.
Key specifications include a 5.25 in length/depth, 4.54 in height, and 5.25 in width, with a weight of 3.15 lb. The enclosure features a 2 in cover opening, a 3/4 in trade size, copper-free aluminum construction, a glass cover, and Catalog Number EIH21 along with UPC 782274414812 for identification and procurement.
EIH21 carries NEC/CEC hazardous location ratings (Class I, II, III divisions) and multiple NEMA ratings (3, 4, 4X, 7, 9). Area classification is listed as Hazardous/Classified Locations, which informs its suitability for regulated environments. These certifications address electrical safety, enclosure integrity, and performance under hazardous conditions across various jurisdictions.
Installation instructions are available in Eaton’s IF 1179 documents for EIH/EIHT Instrument Enclosures, plus specific sheets like IF1458. Catalog data can be accessed through Eaton’s EIH21 specification sheet, the Crouse-Hinds catalog page, and UL/Canada certification pages linked in the product downloads. These resources support procurement, design, and on-site commissioning.