EPC Series Explosionproof Circuit Breakers


EPC Circuit Breakers are used:

  • For service entrance, feeder or branch circuit protection for lighting, heating, appliance and motor circuits
  • To provide disconnect means, short circuit protection and thermal time delay overload protection
  • Indoors or outdoors at petroleum refineries, chemical or petrochemical plants and other process industry facilities where similar hazards exist
Frame Sizes 100; 150; 225; 250A
Internal Diameter 7" or 7" W
Number of Poles 2 or 3
Enclosure Hub Sizes 1 1/4" or 2"
Body, Cover, and Operating Handle Material Copper-free aluminum
Operating Shaft Material Stainless steel
Interior Parts Material Sheet steel
Available Options Auxiliary switch; insulated neutral; grounded neutral; side bosses; back boss; breather/drains


  • Quick-opening covers – less than two turns to remove or install
  • Three section design for ease of installation
  • Water shedding construction with female threads on top cover, male threads on bottom cover, and top cover skirted
  • Specially located stops and locks ensure adequate thread engagement and prevent overtightening
  • Separate replaceable mounting bracket attached to the rear of the body provides three-point suspension for quick installation and leveling – one keyhole slot at top and two open slots at bottom
  • Bodies have two taper tapped conduit hubs with integral bushings on the top, and two more directly below
  • Mounting plates are supplied with all necessary holes and hardware to attach any of the circuit breakers shown in the catalog listings; breaker and interior mounting frames are easily removed as a unit, providing free access to the wiring chamber
  • Breaker is operated by an external handle which can be padlocked in either "ON" or "OFF" positions by as many as three padlocks; breaker is trip-free of the handle and will open under short circuit or overload, even if the handle is locked in the "ON" position