EBMB Series Explosionproof Circuit Breakers


EBMB hinged cover motor control enclosures are used:

  • In damp, wet, dirty, dusty hazardous locations without the need for a protective shelter
  • To provide line disconnect means and short circuit protection
  • For service entrance, feeder or branch circuit protection for lighting, heating, appliance and motor circuits
Circuit Breaker Frame Sizes 100; 150; 250; 400; 600; 800A
Number of Poles 3 (standard); 1 or 2 poles (available upon request)
Body, Cover and Operating Handle Material Copper-free aluminum
Operating Shaft and Bushing Material Stainless steel
Interior Parts Material Sheet steel, electrogalvanized
Cover Bolts, Washer and Retractile Springs Material Stainless steel
Available Options Pilot lights; LED pilot lights; start-stop pushbuttons; space heaters; insulated neutral; breather/drains; epoxy finish; auxiliary switches; terminal blocks; control relays


  • Rugged, corrosion resistant, cast copper-free aluminum construction (less than 0.4 of 1%)
  • Circuit breaker operating handle located through the right side wall of the body permits visual confirmation of correct component assembly and operation
  • Total compliance to the wiring end room requirements of the National Electrical Code®
  • Semi-clamshell enclosure design, with an external flanged ground joint between body and cover makes interior components more accessible
  • Minimum enclosure-to-enclosure spacing with little interference between the opened cover and an adjacent enclosure
  • Copper-free aluminum hinges allow the cover to swing well out of the way
  • Stainless steel, quick release, captive, hex head cover bolts
  • Stainless steel springs provide clear indication cover bolts are fully retracted from body
  • Versatile, internal operating mechanisms allow for field adjustment to accommodate popular manufacturers' breakers
  • Simple, straightforward installation of breaker on pre-drilled mounting plate within enclosure; mounting plate also field removable
  • Circuit breaker external operating handle can be padlocked in either "ON" or "OFF" positions
  • Neoprene cover gasket permanently attached to the cover seals out moisture
  • Bodies have top and bottom drilled and tapped entrances for power conduits and control conduits; removable reducers are supplied, as standard, to accommodate smaller size conduits; all conduit entrances are plugged
  • Tap-on mounting feet
  • Optional EMPS control devices may be added to enclosure cover
  • Steel bracket for lifting larger enclosures during installation supplied as standard