Appleton U-Line™ Contender™ Factory Sealed 20 Amp Plugs and Receptacles Catalog Page

U-Line™ Contender™ Factory Sealed 20 Amp Plugs and Receptacles

Explosionproof, Dust-Ignitionproof

NEC:

Class I, Division 1, Groups C, D
Class I, Division 2, Group B
Class I, Zone 1, Group IIB
Class I, Zone 2, Group IIB + H2
Class II, Division 1 and 2, Groups F, G

NEC:

Class III
NEMA 3, 3R, 3RX, 4X, 7CD, 9FG

Applications

• Locations where receptacles are used with stationary or
portable electrically operated devices such as:

— Lighting systems
— Conveyors
— Heaters
— Motor-generator sets
— Air conditioners
— Compressors
— Pumps

• Locations where damp or corrosive conditions exist.

Features

• Receptacle covers are UL Listed when used with Contender

series mounting boxes, and UL Classied when used with

Crouse-Hinds

• ECP plug ts any standard non-explosionproof receptacle

(NEMA 5-20R, or 6-20R) as well as U-Line™ explosionproof
receptacles.

• Insulators provide superior dielectric and mechanical strength
and lowest arc tracking.

• Dead front design: receptacle is not energized until plug is fully
inserted and switch is engaged.

™ 

EDS series mounting boxes.

Standard Materials

• Receptacle covers: copperfree (4/10 of 1% max.) aluminum

• Mounting boxes: malleable iron

• Insulating blocks: berglass reinforced thermoset polyester

Standard Finishes

• Malleable iron mounting boxes: triple-coat– (1) zinc electroplate,
(2) chromate and (3) epoxy powder coat

• Receptacle covers and aluminum mounting boxes: epoxy
powder coat

Options

• Copperfree (4/10 of 1% max.) aluminum receptacle cover and
mounting box. Add sufx –SA.

™

NEC Certifications and Compliances

• UL Listed: E10784

• UL Standard: UL 1203, UL 1010, UL 894

Related Products

• U-Line™ Contender™ receptacles only available for use in
combination with 1- and 2-gang EDS series mounting boxes
incorporating such devices as pilot lights, switches and push
buttons. See Controls Section.

PLUGS AND RECEPTACLES: NEC/CEC HAZARDOUS LOCATION

Illustrated Features

Mounting lugs.

NEMA 3RX spring-loaded
cover seats against
neoprene gasket.

Malleable iron mounting box
with triple-coat finish standard.
Optional aluminum mounting
boxes available.

 NEMA 3RX when the spring-loaded cover is installed and closed. NEMA 4X when the screw cover is installed and fully engaged.
Note: Covers are UL Classified to mount on Crouse-Hinds® EDS mounting boxes. Appleton “ENR” Series receptacles are UL Classified for use with Crouse­Hinds® ENP Series plugs.
 Crouse-Hinds, EDS and ENP are registered trademarks of Cooper Crouse-Hinds.

Stainless steel slotted hex
head mounting screws.

U-Line™ NEMA 4X corrosion

resistance screw cover kit

available: ULINEREC4XKIT.

399

U-Line™ Contender™ Factory Sealed 20 Amp Plugs and Receptacles

Explosionproof, Dust-Ignitionproof

NEC:

Class I, Division 1, Groups C, D
Class I, Division 2, Group B
Class I, Zone 1, Group IIB
Class I, Zone 2, Group IIB + H2
Class II, Division 1 and 2, Groups F, G

NEC:

Class III
NEMA 3, 3R, 3RX, 4X, 7CD, 9FG

Illustrated Features

Spring-loaded cover keeps dust out of receptacle when plug is not
in use, which may be rotated 180° or completely removed. Stainless
steel cover spring-completely enclosed for protection from
corrosive environments.

Factory sealed receptacle/switch interior. Switch is an integral
part of receptacle interior, contained in an aluminum sleeve.
Protective xylan coating on inside of sleeve provides smooth
”rotating” action of internal switch, which is activated by rotating
plug in receptacle. Entire aluminum sleeve is sealed at both ends
with neoprene O-rings to protect receptacle/switch interior against
moisture.

ECP Interchanger plug fits ordinary location receptacles (NEMA
5-20R and NEMA 6-20R) and explosionproof U-Line™ receptacle
as well competitors comparable NEMA blade configured
receptacles.

A twist of the plug produces audible ”click” to indicate fast make
and break of built-in switch contacts. Twisting plug locks it in
place—cannot be accidentally pulled out.

With plug in use, neoprene
gasket in throat of receptacle
”seals” around plug keeping
out dirt, water, dust and other
foreign matter.

For safety... Ordinary location
plug will NOT activate
explosionproof U-Line™
receptacle.

With plug not in use, spring-
loaded cover seats against
neoprene gasket to seal
receptacle from corrosive
atmospheres.

Plug mechanical cable clamps
on the plug prevent strain on
cables and meet or exceed UL
150 lb. strain relief pull-out test
for classified locations.

Special neoprene watertight plug bushing accommodates
flexible cord ranging from .538” to .639” in diameter.

PLUGS AND RECEPTACLES: NEC/CEC HAZARDOUS LOCATION

Solderless lugs—all terminals are pressure type to facilitate wiring.

Longer plug housing for better gripping and easier plug insertion

and withdrawal.

400

U-Line™ Contender™ Factory Sealed 20 Amp Receptacles

Explosionproof, Dust-Ignitionproof

NEC:

Class I, Division 1, Groups C, D
Class I, Division 2, Group B
Class I, Zone 1, Group IIB
Class I, Zone 2, Group IIB + H2
Class II, Division 1 and 2, Groups F, G

Single Gang

Dead-End Feed-Thru

Two Gang

Receptacle with GFI Cover, Two
Gang

Replacement Receptacle Covers and Spare Parts

NEC:

Class III
NEMA 3, 3R, 3RX, 4X, 7CD, 9FG

Dead-End

Feed-Thru

Dead-End

Feed-Thru

Dead-End

Feed-Thru

Type Hub Size

1/2 ENR11201 ENR11202

3/4 ENR21201 ENR21202

1 ENR31201 ENR31202

1/2 ENRC11201 ENRC11202

3/4 ENRC21201 ENRC21202

1 ENRC31201 ENRC31202

1/2 ENR12201 ENR12202

3/4 ENR22201 ENR22202

1 ENR32201 ENR32202

1/2 ENRC12201 ENRC12202

3/4 ENRC22201 ENRC22202

1 ENRC32201 ENRC32202

1/2 ENR12201GFI —

3/4 ENR22201GFI —

1 ENR32201GFI —

1/2 ENRC12201GFI —

3/4 ENRC22201GFI —

1 ENRC32201GFI —

Catalog Numbers 

125 Vac 250 Vac

PLUGS AND RECEPTACLES: NEC/CEC HAZARDOUS LOCATION

Receptacle Cover Assembly ENR5201 ENR6202

Spring-loaded Cover Replacement Assembly
(Aluminum)

ENR5201 GFS1

 Standard mounting box malleable iron. For aluminum mounting box, add suffix –SA to catalog number.
 GFI units rated 20 Amp, 125 VAC. Trip setting is 5 mA.

 NEMA 3RX when the spring-loaded cover is installed and closed. NEMA 4X when the screw cover is installed and fully engaged.

 GFS-1 covers and GFI receptacle combinations are not certified for use in Class I, Division 2 Group B.

GFCI Cover Assembly 

NEMA 4X Screw Cover Kit 

ULINEREC4XKIT

ULSCA

GFS1

401

U-Line

™

Interchanger 20 Amp Plugs

For U-Line™ Contender™ 20 Amp Receptacles. Explosionproof, Dust-Ignitionproof

These watertight  plugs also fit NEMA 5-20R or 6-20R receptacles in nonclassified areas. Choice of Aluminum or Thermoplastic Polyester Plug.

NEC/CEC:

Class I, Division 1 and 2, Groups B, C, D
Class II, Division 1 and 2, Groups F, G
Class III
NEMA Type 4

Applications

• U-Line™ Interchanger ECP plug: suitable for use in such areas

as reneries, petrochemical plants, and other areas subject to

where ignitable gases are present.

• NCP Plug: ideal where moisture or corrosion is a constant
problem, such as production facilities on marine platforms, and
pipeline transportation facilities.

Features

• Unique blade-type, brass contacts exert constant pressure
along entire contact surface and provide superior electrical
contact.

• Insulators provide superior dielectric and mechanical strength
and lowest arc tracking.

• Longer plug housing for better gripping and easier plug
insertion and withdrawal.

Amp Diagram

U-Line™ Interchanger ECP Standard Plug

20 2W, 3P 0.538 to 0.639 ECP-2023 –––

20

NCP Plug

20 2W, 3P 0.538 to 0.639 NCP-2023 –––

• Plugs ts any standard non-explosionproof receptacle

(NEMA 5-20R, or 6-20R) as well as U-Line™ explosionproof
receptacles.

• ECP plug: a twist of the plug produces audible ”click” to
indicate fast make and break of built-in switch contacts.
Twisting plug locks it in place and cannot be accidentally
pulled out.

• NCP plug: special neoprene watertight plug bushing

accommodates exible cord ranging from .538” to .639”

diameter.

Standard Materials

• ECP plug: copperfree (less than 4/10ths of 1%) aluminum.

• NCP plug: 30% glass-reinforced thermoplastic polyester.

Catalog Number

Wire/

Pole

2W, 3P 0.538 to 0.639 ––– ECP-20232

Cable Dia.,

(Inches)

125 Vac 250 Vac

Dimensions in Millimeters (Inches)

PLUGS AND RECEPTACLES: NEC/CEC HAZARDOUS LOCATION

 Watertight when unmated.

402

20

2W, 3P 0.538 to 0.639 ––– NCP-20232

GFS-1 Factory Sealed Ground Fault Circuit Interrupter

For U-Line™ Contender™ 20 Amp Receptacles. Explosionproof, Dust-Ignitionproof

125 Vac Branch Circuits. Installs on Standard Contender Series Mounting Boxes.

NEC:

Class I, Division 1 and 2, Groups C, D
Class II, Division 1 and 2, Groups E, F, G
Class III
NEMA 3, 3X, 3RX, 7CD, 9FG

Applications

• Provides required ground fault protection for portable
electrically-operated devices. Meets all UL and CSA
requirements for ground fault protection in hazardous locations.

• Well suited for use in highly corrosive atmospheres and wet
locations.

• Can be used in conjunction with U-Line™ factory sealed
Contender™ receptacle on 20 Amp, 125 Vac branch circuits.

Features

• GFI covers are UL Listed when used with Contender™ series

mounting boxes, and UL Classied when used with Crouse-

Hinds® EDS series mounting boxes.

• Factory sealed construction; no external seals are required.

Arcing is conned within the device’s interior sealed chamber.

• Rated 20 Amp, 125 Vac, 5 mA trip setting.

• Smooth-operating test and reset buttons.

Standard Materials

• GFI cover and sealing chamber cast copperfree (less than 4/10
of 1%) aluminum

• Cover bolts, test and reset buttons and shafts: stainless steel

Standard Finishes

• GFI cover: Epoxy powder coat

NEC Certifications and Compliances

• UL Listed: E81751

• UL Standard: UL 943, UL 1203

Description Catalog Number

PLUGS AND RECEPTACLES: NEC/CEC HAZARDOUS LOCATION

Aluminum Ground Fault Interrupter Cover/Device GFS1

Dimensions in Millimeters (Inches)

Note: Covers are UL Classified to mount on Crouse-Hinds® EDS mounting boxes. Crouse-Hinds, EDS and ENP are registered trademarks of Cooper Crouse­Hinds.

403

U-Line™ Contender™ 20 Amp Receptacle Mounting Boxes

NEC:

Class I, Division 1 and 2, Groups C, D
Class II, Division 1 and 2, Groups E, F, G
Class III

EDS Cast Device Mounting Boxes

Hub Size

Type A B C Malleable Iron Aluminum

(Inches)

Dimensions in Millimeters (Inches) Catalog Number

Single Gang

Two Gang

Tandem 

Dead-End

Feed-Thru

Dead-End

Feed-Thru

Dead-End

Feed-Thru

1/2 153.9 (6.06) 172.9 (6.81) 19.0 (0.75) EDS171 EDS171-SA

3/4 153.9 (6.06) 172.9 (6.81) 22.3 (0.88) EDS271 EDS271-SA

1 156.7 (6.17) 178.5 (7.03) 25.4 (1.00) EDS371 EDS371-SA

1/2 153.9 (6.06) 172.9 (6.81) 19.0 (0.75) EDSC171 EDSC171-SA

3/4 153.9 (6.06) 172.9 (6.81) 22.3 (0.88) EDSC271 EDSC271-SA

1 156.7 (6.17) 178.5 (7.03) 25.4 (1.00) EDSC371 EDSC371-SA

1/2 153.9 (6.06) 172.9 6.81) 22.3 (0.88) EDS172 EDS172-SA

3/4 153.9 (6.06) 172.9 (6.81) 22.3 (0.88) EDS272 EDS272-SA

1 156.7 (6.17) 178.5 (7.03) 25.4 (1.00) EDS372 EDS372-SA

1/2 153.9 (6.06) 172.9 (6.81) 22.3 (0.88) EDSC172 EDSC172-SA

3/4 153.9 (6.06) 172.9 (6.81) 22.3 (0.88) EDSC272 EDSC272-SA

1 156.7 (6.17) 178.5 (7.03) 25.4 (1.00) EDSC372 EDSC372-SA

1/2 287.2 (11.31) 307.0 (12.09) 22.3 (0.88) EDS147 EDS147-SA

3/4 287.2 (11.31) 307.0 (12.09) 22.3 (0.88) EDS247 EDS247-SA

1 290.5 (11.44) 312.6 (12.31) 25.4 (1.00) EDS347 EDS347-SA

1/2 287.2 (11.31) 307.0 (12.09) 22.3 (0.88) EDSC147 EDSC147-SA

3/4 287.2 (11.31) 307.0 (12.09) 22.3 (0.88) EDSC247 EDSC247-SA

1 290.5 (11.44) 312.6 (12.31) 25.4 (1.00) EDSC347 EDSC347-SA

Dimensions in Millimeters (Inches)

Single Gang Mounting Box

with Receptacle Cover

Two Gang Mounting Box

with Receptacle Cover

Ø 8.1 mm (0.32”)

Single/Two Gang Mounting Box

with Receptacle Cover Side View

Tandem Mounting Box

PLUGS AND RECEPTACLES: NEC/CEC HAZARDOUS LOCATION

88.9 mm
(3.50”)

149.3 mm
(5.88”)

159.2 mm
(5.09”)

33.2 mm
(1.31”)

182.6 mm
(7.19”)

149.3 mm
(5.88”)

60°

81.2 mm
(3.20”)

157.2 mm
(6.19”)

A

B

66.8 mm
(2.63”)

 For tandem mounting boxes, external seals must be installed within 1.52 meters (5 feet) of each conduit entrance for Class I, Groups C and D.

404

77.7 mm
(3.06”)

3.50”

88.9 mm

C