Plugs Allow You to Safely Connect Power


In a move to drive greater electrical safety in industrial facilities, Emerson is now offering its Appleton UPR Series plugs and switched receptacles with the capability to satisfy the most demanding electrical codes, including ATEX and IECEx. Compact, lightweight and corrosion resistant, UPR Series plugs and receptacles are ideal for connecting power to portable or stationery electrical equipment, such as industrial lighting systems, heaters, conveyors, motor generators and pumps.


UPR Series plugs and receptacles simplify specification in oil refineries, offshore rigs, and other hazardous locations. In addition, the same UPR plug employed in a hazardous location can be used safely in a standard, non-hazardous area when connected to an interlocking non-hazardous receptacle, an advantage that broadens the use of portable electrical equipment throughout a facility.


Both 16 Amp and 32 Amp UPR models are constructed of rugged non-metallic polyamide for superior corrosion-resistance, and provide critical safety features like color-coding to ensure safe identification of matching voltages, mechanical interlock so that disengagement cannot occur while energized, along with a keyed design to prevent insertion of plugs into receptacles wired for a different voltage or phase configuration. Adding to operational safety is a lockable external switch that complies with IEC 60309-1, allowing the receptacle to be locked in either "on" or "off" position while giving visual confirmation of status to workers.



  • Plug and socket system is designed with a mechanical interlock to insure disengagement cannot occur while energized
  • Large ON/OFF actuator on the receptacle gives clear, visible indication of the receptacle status for maximum hazardous location protection
  • LV receptacle can be locked in 0 (Off) and 1 (On) positions
  • Different voltages are color coded for easy identification
  • The receptacles are keyed to accept UPR plugs of the proper voltage
  • Receptacle explosionproof switch
  • UPR plugs can be used in non-hazardous IEC 60309-2 sockets
  • Operating temperature of -20 to +55°C (-4 to +131 °F)
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