BHR Series Explosionproof Interlocked Receptacles with Factory Sealed Switch


BHR Interlocked Receptacles are used:

  • To supply power to portable electrical equipment such as motor-generator sets, compressors, heating and cooling units, lighting systems, and conveyors
  • In areas which are hazardous due to the presence of hydrogen or gases, or vapors of equivalent hazard
Amperages 30; 60; 100A
Configurations 2W 3P; 3W 4P; 4W 5P
Hub Sizes 3/4"; 1"; 1 1/4"; 1 1/2"; 2" (Receptacle)
Cable Diameters 0.500-0.875; 0.875-1.375; 1.375-1.875 (Plug)
Voltage 480VAC
Receptacle Housing Material Copper-free aluminum
Seal Material Malleable iron
Insulation Material High impact glass filled phenolic


  • Feature a built-in rotary switch which is operated automatically when the plug is inserted and withdrawn; the switch, capable of making and breaking the circuit at full rated load, is operated by a helical blade in the center of the plug
  • The plug and receptacle contacts cannot be made or broken under load; when the plug is inserted, the plug and receptacle contacts engage before the switch closes; when the plug is withdrawn, the switch opens before the plug and receptacle contacts disengage; this sequence of operation provides maximum safety in a dead front receptacle; arcing is isolated in a flametight and dusttight chamber
  • Operation is simple, safe and positive; to disconnect the portable device, the plug fastening ring is unscrewed and the plug simply pulled straight out; no separate interlock device or operating handle need be actuated
  • Positive engagement without mismatching is assured by a distinct physical polarization of the plug and receptacle in every rating
  • Plugs are furnished with pressure terminations; receptacles are furnished with flexible leads for splicing to the supply conductors; a large threaded cover provides access to the wiring compartment
  • Assemblies are available for top, bottom or through feed conduit arrangements in 3/4" to 2" sizes