Appleton Appleton U-Line Contender and U-Line Factory Contender Factory Sealed 20 Amp Plugs and Receptacles, 330062-1 Instruction Sheet

330062-1

INSTRUCTION SHEET

U-LINE®, CONTENDER® U-LINE®, EFS/EFSR/ENR SERIES

Class I, Div. 1 and 2
Groups B◊, C, D

INSTALLATION AND MAINTENANCE INSTRUCTION

Class II, Div. 1 and 2
Groups F, G
Class III
Type: 3RX

APPLICATION and FEATURES:

• U-Line®/Contender® U-Line® receptacles and ECP/NCP
plugs combination are designed for use where power is to be
supplied to portable electric equipment in locations which are
hazardous due to the presence of flammable vapors and gases or
locations where damp or corrosive conditions are encountered.

• These plugs and receptacles are for 15 or 20 ampere use at 125
volts AC and 20 ampere use at 250 volts AC.

• U-Line® receptacles mount on single or double-gang EFD
series boxes. Contender® U-Line® receptacles mount on single
or double-gang EDS series boxes.

• Receptacle is grounded through and extra pole as well as
through the receptacle housing.

INSTALLATION:

ELECTRICAL WARNING
Electrical power supply must be “OFF” before and during
installation and maintenance. Failure to do so may result
in serious or fatal injuries due to electrocution.

Note: Use minimum #12 copper or copper clad building wire

1. Mount receptacle back box in desired location. If receptacle is

already mounted on the box, take out four mounting screws and
remove receptacle. Pull in power source wiring to the box,
making sure wire leads extend out of box far enough for proper
connections to be made (See Figure 2).

2. Strip insulation from power lead ½”. Connect power leads to
receptacle terminals. Wiring must comply with applicable local
codes (See Figure 3).

3. To make connections, loosen wire screws, slide stripped end
of wire into contact and tighten wire screw to 20 in-lb torque (See
Figure 4).

4. Apply a thin film of lubricant (supplied with receptacle) to the
flange. Reinstall receptacle on the flange and tighten four
mounting screws provided to 30 in-lb torque. Receptacle
assembly is now complete and power may now be turned on.

Retain this instruction sheet for future reference.

For Convenience…ECP InterchangerTM Plug fits
ordinary location receptacles (NEMA 5-20 or 15
NEMA 620) and explosion proof U-Line®
Receptacle as well as Killark® “UGR” Series and
Crouse-Hinds® “ENR” Series.

Figure 2

Grounded White Lead
connection for 125V, Black
Lead connection for 250V

Note: For 250V, there are 2 blacks wires, connect
one to black lead and other to indicated white lead
as shown.

Figure 1A

Figure 1B

Figure 3

Black Lead
Connection

ESG Electrical Group • 800-621-1506 • www.appletonelec.com Rev. A 02/18/09 Page 1

The mating flat flange surfaces on both receptacle and
back box are explosion-proof surfaces. Surfaces are not to
be scratched and MUST be clean and flat before assembly.
Gaskets, paint, or any other similar material must NOT be
used in this joint.

OPERATION:

The U-Line®/Contender U-Line® receptacle is dead-front
construction. Electrical connection between it and ECP/NCP plug
is accomplished after plug fully inserts into receptacle and rotate
clockwise.

1. Lift receptacle door and locate polarization on mating plug pin
and receptacle face. Insert plug straight all the way into receptacle
until it can not go further (see figure 5).

2. Rotate plug clockwise limit (37º), this closes internal contacts
and completes circuit. This also mechanically locks plug into
receptacle so it cannot be pulled out.

3. To remove plug, push plug inward and turn to counterclockwise,
pull plug straight out.

MAINTAENANCE:

Electrical and mechanical inspection of all components must be
performed on a regularly scheduled basic, determined by the
environment and frequency of use. It is recommended that
inspection be performed a minimum of once a year.

WARNING
Electrical power supply must be “OFF” before and during
installation and maintenance. Installation and
maintenance procedure must be performed by a trained
and competent electrician.

WARNING
If any parts of the receptacle or plug appear to be missing,
broken, or show signs or damage, DISCONTINUE USE
IMMEDIATELY. Replace with the proper replacement
part(s) before continuing service.

1. Inspect all contact wire terminals for tightness. Discoloration
due to excessive heat is an indicator of a possible problem and
should be thoroughly investigated and repaired as necessary.

2. Inspect contacts for signs of wear and replace if necessary.

3. Clean exterior surfaces making sure nameplates remain legible.

4. Check tightness of all screws before using.

CAUTION

125 V 250 V

EFSR-2023
EFSR-2023K
EFSR-2023M
ENR5201
ULINE3RXKIT ULINE3RXKIT Screw cover kit
ULSCM ULSCM Flip cover & ring kit, malleable iron.
ULSCA ULSCA Flip cover & ring kit, aluminum.
59308097000 59308097000 Receptacle gasket

Catalog No. Description

Replacement Parts

EFSR-20232 Receptacle cover (aluminum).

EFSR-20232K Receptacle for use on Killark SWB boxes

EFSR-20232M Receptacle cover (malleable iron)
ENR6202 Contenter® receptacle cover (aluminum)

Figure 4 (mounting receptacle onto back box with
hinge in UP position)

Figure 5 - Plug Inserts In Receptacle

Figure 6
Receptacle
Cover

Page 2 330032-1 Rev. A 02/18/09 ESG Electrical Group • 800-621-1506 • ww.appletonelec.com