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Clamped EBMXS Explosionproof Motor Starters

The only NEMA 7 clamped enclosure for hazardous areas.  One of the biggest challenges with enclosures located in hazardous areas is accessibility.  To access internal components for preventative maintenance or troubleshooting, up to 70 bolts have to be loosened and then retightened, leading to extended periods of downtime and safety risks due to improperly torqued or missing bolts.

Crouse-Hinds series clamped EBMX enclosures utilize patented clamping technology to reduce downtime, increase safety and lower maintenance costs.  EBMXS motor starters provide across-the-line starting, stopping, speed changing and reversing of polyphased AC induction motors with overload and undervoltage.  It is ideal for harsh and hazardous motor control environments in refineries, chemical and petrochemical plants, corrosive process facilities, food and beverage facilities, marine and mining applications. 

And now, Eaton’s Smart EBMX enclosure combines the industry’s first explosionproof clamping enclosure design for hazardous environments with IoT-enabled circuit breakers and intelligent motor management relays—enabling safer, faster and smarter operations in the most demanding applications.

Clamped EBMXS Explosionproof Motor Starters
Clamps ensure error-proof install
Withstands extreme temps, water and dust
Ease of Use
Opens and closes in seconds

Safer. Faster. Smarter.

Crouse-Hinds series EBMX now available with Power Defense circuit breakers and Power Xpert C445 intelligent motor management relays. 

With Smart EBMX you get motor starters, breakers and combination starters all with the latest protection technology, keeping your system connected, your equipment and employees protected, and your customers informed.


Smart EBMX 500 x 400

Power Xpert C445

The Smart EBMX with C445 motor management intelligence relay offers industry-leading protection, diagnostics and energy usage analytics. Advanced motor management, extensive communications, superior diagnostics, integrated logic, ground fault detection and protection make Smart EBMX with C445 option ideal for critical motor applications where uptime is key.

Certifications and compliances


  • Class I, Divisions 1 & 2, Groups B*, C, D
  • Class I, Zones 1 & 2
  • Class II, Groups E, F, G
  • Class III

UL standards

  • UL1203 – Explosionproof and Dust-ignitionproof Electrical Equipment for use in Hazardous (Classified) Locations
  • UL2062 – High AIC Ratings for Groups C, D
  • cUL to CSA C22.2 No. 30
Additional certifications
  • UL/cUL certified for -50°C to +60°C
  • SASO Certificate of Conformity

Environmental ratings

  • NEMA 3R, 4X**, 7BCD, 9EFG

*High AIC and -50°C temperature certifications do not apply for Group B.

**Enclosures with PB23, RR2 and RR3 options are rated NEMA 3R.  All other options maintain NEMA 4X rating.

Design features

  • Clamped enclosure significantly reduces time to enter enclosure and reduces opportunity for missing, stripped or broken bolts
  • -50°C to +60°C temperature range for extreme environments
  • Bi-metallic and electronic overload protection options
  • Normally open (NO) holding circuit contact supplied standard
  • Up to six cover operators for a variety of applications
  • Side operated handle provides visual confirmation of proper operator alignment while cover is open
  • Neoprene cover gasket provides NEMA 4X protection for hose down applications
  • Maximum wiring room compliance with National Electrical Code requirements allows for easy and safe installation
  • Rugged, corrosion-resistant, cast copper-free aluminum construction provides NEMA 4X protection
  • Semi-clamshell enclosure design, with an external flanged ground joint between body and cover, provides increased access to interior components
  • Minimum enclosure-to-enclosure spacing with little interference between the opened cover and adjacent enclosure
  • Detachable tap-on mounting feet
  • Steel brackets supplied standard for lifting during installation
  • Bodies have top and bottom drilled and tapped entries for power and control conduits; removable reducers are supplied standard to accommodate smaller size conduits; all conduit entries are plugged

Standard materials

  • Body and cover – copper-free aluminum
  • Clamp – anodized copper-free aluminum
  • External hardware – stainless steel
  • Internal parts – galvanized steel


Drawings and design support

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