Eaton EMH521 20000 Instrument Housing - Hazardous Locations
Part Number: EMH521 20000
Manufacturer
Eaton Crouse-Hinds
Part number
EMH521 20000
Quick Summary
EMH521 20000 instrument housing protects meters in hazardous locations across industrial facilities. In challenging environments, unreliable enclosures can expose meters to dust, moisture, and accidental contact, causing downtime and costly maintenance. This unit meets NEC/CEC standards and carries NEMA ratings for hazardous areas, supporting Class I, II, and III service with Division 1 and 2 classifications. With surface-mount deployment, a single conduit opening, and a 3/4 inch trade size, it delivers straightforward installation and reliable meter protection. Designed for Weston, Westinghouse, and Simpson meters and built from copper-free aluminum, it reduces weight and corrosion risk while staying compliant and easy to procure.
Product Information
Extended Description
EMH521 20000 Eaton Crouse-Hinds: Eaton Crouse-Hinds series EMH instrument housing, 1 conduit opening, Copper-free aluminum, Surface mount, Dead end, 3/4", Used with select Weston, Westinghouse and Simpson meters
Product Name
Eaton Crouse-Hinds series EMH instrument housing
Catalog Number
EMH521 20000
Product Length/Depth
5.75 in
Product Height
5.75 in
Product Width
5.69 in
Product Weight
4.7 lb
UPC
782274310107
Area classification
Hazardous/Classified Locations
Standards type
NEC/CEC
NEC hazardous rating
Class I, Division 1 Class I, Division 2 Class II, Division 1 Class II, Division 2 Class III
NEMA Rating
3 7 9 12
Mounting style
Surface
Conduit openings
1
Style
Dead end
Trade size
3/4"
Used with
Select Weston, Westinghouse and Simpson meters
Material
Copper-free aluminum
Crouse-Hinds series EMH Explosionproof Instrument Enclosures catalog page
Eaton Specification Sheet - EMH521 20000
Copper-free aluminum construction delivers outstanding corrosion resistance while keeping weight manageable, a combination that extends enclosure life in outdoor, chemical, and damp environments. Lighter enclosures reduce labor and forklift time during installation and replacements, contributing to lower total cost of ownership. In harsh facilities, this material choice also minimizes galvanic risks with other grounded components, providing stable electrical performance over time. One conduit opening at 3/4 inch trade size simplifies wiring, minimizes penetrations, and reduces the number of fittings required. This translates to faster field assembly, fewer potential leaks, and easier inspection and maintenance. Its compact entry aligns with tight panel spaces and retrofit projects, saving both time and material costs. Surface mounting and dead-end style offer versatile installation across wall surfaces, equipment housings, or control panels. The surface-mount footprint accommodates common mounting patterns without special brackets, while the dead-end design reduces cable bend radius and strain on terminations. For technicians, this means predictable mounting outcomes and fewer field adjustments. NEC/CEC compliance paired with NEMA ratings 3, 7, 9, and 12 provides regulatory alignment for a wide range of hazardous/classified locations. Area classification as Hazardous/Classified Locations ensures suitability in Class I/II/III, Division 1 and 2 environments. These certifications support audits and cross-border deployments, helping procurement and engineering teams avoid redesigns when expanding plant footprints. Compatibility with Weston, Westinghouse, and Simpson meters ensures reliable integration with existing metering ecosystems. Copper-free aluminum construction and a 4.7 lb weight support easy handling in field service, while dimensions of approximately 5.75 in by 5.75 in by 5.69 in fit compact installations. Overall, EMH521 20000 delivers a robust, compliant, and install-ready solution for demanding industrial environments.
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FAQs
Plan for surface-mount installation in approved HazLoc zones, using the 1 conduit opening for a 3/4 in trade size conduit. Ensure enclosure is mounted away from heat sources and vibrations; use appropriate sealing gaskets and fittings per NEC/CEC requirements. Verify compatibility with existing Weston, Westinghouse, or Simpson meters before wiring.
EMH521 20000 carries NEC/CEC compliance, NEMA ratings for hazardous locations (3, 7, 9, 12), and Hazardous/Classified Area usage. It supports Class I, II, and III service with Division 1 and 2 designations, making it suitable for a wide range of industrial environments and helping with regulatory audits.
Yes. EMH521 20000 is designed for use with select Weston, Westinghouse, and Simpson meters. Confirm meter model compatibility during specification review to ensure proper fit, mounting, and electrical connections, and verify conduit and knock-out alignment in the enclosure.
The single 3/4 inch conduit opening simplifies wiring, reduces penetration points, and minimizes required fittings. This streamlines field routing, lowers installation time, and reduces material costs, especially in retrofit projects or tight-panel installations where space is at a premium.
EMH521 20000 measures approximately 5.75 inches in length and height, 5.69 inches in width, and weighs about 4.7 pounds. These compact dimensions support installation in limited spaces while still providing robust protection for meters in hazardous locations.