Appleton™ U-Line™ ECS Factory Sealed 15 and 20 Amp Plugs and Receptacles

U-Line™ ECS Factory Sealed 15 and 20 Amp Plugs and Receptacles feature a dead front design making them ideal for use with electrical equipment in hazardous locations. The neoprene gasket in the throat of the receptacle seals against the plug or the spring-loaded cover to seal out water, dust and corrosive compounds. Although U-Line plugs can be used with ordinary receptacles, U-Line receptacles are designed so that they can’t be energized by an ordinary plug.


  • Factory sealed, external seals not required. Arcing is safely confined to receptacle interior
  • Unique blade-type, brass contacts exert constant pressure along entire contact surface and provide superior electrical contact
  • Energized receptacle contacts deeply recessed to reduce danger of accidental touching
  • Insulators provide superior dielectric and mechanical strength and lowest arc tracking
  • ECP plug fits any standard non-explosionproof receptacle (NEMA 5-15R, 5-20R, or 6-20R) as well as U-Line explosionproof receptacles
  • Intermateable with competitor’s plugs of like configurations


Hazardous Area Classification
Class I, Division 1 and 2 Groups B, C, D; Class II, Division 1 and 2 Group G (Coal Dust); Class III; CSA Type 7BCD, 9G
15 or 20
127 Vac or 250 Vac
Number of Poles
Number of Wires
Horsepower Ratings
1, 2
Plug Cable Diameter
.538 – .639
Mounting Box Entries
Materials and Finishes
Receptacle, cover, mounting box, connector housings, caps, ECP plug are copperfree (4/10 of 1% max.) aluminum with epoxy powder coat. Fiberglass reinforced polyester insulating blocks
Glodok Exproof Product