Page 1
Plugs and RecePtacles: nec/cec HazaRdous location
© November 2016
U-Line™ Factory Sealed 20 Amp Plugs and Receptacles
Explosionproof, Dust-Ignitionproof
Dead-Front Safety Construction. 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 3, 3R, 7BCD, 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 with damp or corrosive conditions.
• Class I: classied locations where ignitable vapors or gases
are present such as:
— Petrochemical plants
— Petroleum reneries
— Paint and chemical plants
• Class II: classied locations such as:
— Process industries where there are dust hazards from
handling such products as our, grain and starch or any
location where ignitable amounts of dust are present or
amounts which would adversely affect performance.
Features
• Intermateable with competitor's plugs of like congurations.
• Factory sealed, external seals not required in most areas.
Arcing is safely conned to receptacle interior.
• Choice of aluminum receptacle with malleable iron mounting
box or all malleable iron receptacle and box.
• Energized receptacle contacts deeply recessed to reduce
danger of accidental touching.
• 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.
• ECP plug ts any standard non-explosionproof receptacle
(NEMA 5-20R, or 6-20R) as well as U-Line™ explosionproof
receptacles.
Standard Materials
• U-Line™ receptacle and cover: copperfree (4/10 of 1% max.)
aluminum
• U-Line™ mounting box: malleable iron
• U-Line™ M Series receptacle and mounting box: malleable iron
• ECP plugs: copperfree (4/10 of 1% max.) aluminum housings
• Insulating blocks: glass-lled reinforced polyester
Standard Finishes
• Malleable iron mounting boxes: triple-coat—(1) zinc electroplate,
(2) chromate and (3) epoxy powder coat
• U-Line™ receptacles: epoxy powder coat
• Cord connector housings and caps: epoxy powder coat
Options
• U-Line™ all-aluminum receptacle cover and box. Add sufx -A.
NEC/CEC Certifications and Compliances
• UL Listed: E10784, E81751
• UL Standard: 1203, 1010, 894
• CSA Standard: C22.2 No. 25, C22.2 No. 30, C22.2 No. 42,
C22 No.159
• CSA Certied: 038644
Illustrated Features
Mounting lugs.
Malleable iron mounting box
with triple-coat finish standard.
Aluminum back box available.
Select items suitable for Class I, Group B, C and D; Class II, Groups F, G; and Class III. See product selection pages for suitable items.
Note: Special U-Line™ receptacles are UL Classified to mount on Killark SWB boxes. Killark is a registered trademark of Hubbell Incorporated.
Stainless steel slotted hex
head mounting screws.
Receptacle housing and
cover optional malleable
iron on EFS-M Series.
Spring-loaded cover seats
against neoprene gasket.
U-Line™ NEMA 4X corrosion
resistance screw cover kit
available: ULINEREC4XKIT.
381
Page 2
Plugs and RecePtacles: nec/cec HazaRdous location
© November 2016
U-Line™ Factory Sealed 20 Amp Plugs and Receptacles
Explosionproof, Dust-Ignitionproof
Dead-Front Safety Construction. 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 3, 3R, 7BCD, 9FG
Illustrated Features
Spring door 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.
With plug in use, neoprene
gasket in throat of receptacle
”seals” around plug keeping
out dirt, water, dust and other
foreign matter.
With plug not in use, spring-
loaded door seats against
neoprene gasket to seal
receptacle from corrosive
atmospheres.
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.
Solderless lugs—all terminals are pressure type to facilitate wiring. Longer plug housing for better gripping and easier plug insertion
For safety... Ordinary location
plug will NOT activate
explosionproof U-Line™
receptacle.
Special neoprene watertight plug bushing accommodates
flexible cord ranging from .538” to .639” in diameter.
and withdrawal.
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.
Select items suitable for Class I, Group B, C and D; Class II, Groups F, G; and Class III. See product selection pages for suitable items.
382
Page 3
Plugs and RecePtacles: nec/cec HazaRdous location
© November 2016
U-Line™ Factory Sealed 20 Amp Aluminum Receptacles
Explosionproof, Dust-Ignitionproof
125 Vac, 20 Amp, 1 HP; 250 Vac, 20 Amp, 2 HP. Dead-Front Safety Construction.
NEC/CEC:
Class I, Division 1 Groups B, C, D
Class I, Division 2 Groups B, C, D
Class II, Division 1 and 2 Groups F, G
Class III
NEMA 3, 3R
Aluminum Receptacle and Malleable Iron Mounting Box
Type Wire/Pole
Hub Size
(Inches)
125 Vac, 1 HP 250 Vac, 2 HP
Catalog Number
Single Gang
Class I, Division 1 and 2 Groups B, C, D; Class II, Division 1 and 2 Groups F, G; Class III.
Suitable for use in Class I, Division 1, Group B
when used with external seals.
1/2 EFS150-2023 EFS150-20232
Dead-End 2W, 3P
3/4 EFS175-2023 EFS175-20232
1 EFS110-2023 EFS110-20232
1/2 EFSC150-2023 EFSC150-20232
Feed-Thru 2W, 3P
3/4 EFSC175-2023 EFSC175-20232
1 EFSC110-2023 EFSC110-20232
Dead-End Feed-Thru
Two Gang
Class I, Division 1 and 2 Groups C, D; Class I, Division 2, Groups B, C, D; Class II, Division 1 and 2 Groups F, G; Class III.
1/2 EFS250-2023 EFS250-20232
Dead-End 2W, 3P
3/4 EFS275-2023 EFS275-20232
1 EFS210-2023 EFS210-20232
1/2 EFSC250-2023 EFSC250-20232
Feed-Thru 2W, 3P
3/4 EFSC275-2023 EFSC275-20232
1 EFSC210-2023 EFSC210-20232
Dead-End Feed-Thru
Replacement Receptacles
2W, 3P EFSR-2023 EFSR-20232
Spring Door Replacement Assembly (aluminum) ULSCA
Receptacle for use on Killark
SWB Boxes.
EFSR-2023K EFSR-20232K
NEMA 4X Corrosion Resistance Kit
Standard back box malleable iron. For aluminum back box, add suffix –A to catalog number.
Seals (not furnished—see Hazardous Location Fittings Section) must be placed within 2 inches from each conduit opening. Seals are not required in Class I,
Division 2 locations.
NEMA Type 4X when the screw cover is installed and the cover is fully engaged.
Shaded area indicates items suitable for Class I, Group B, C and D; Class II, Groups F, G; and Class III.
Killark is a registered trademark of Hubbell Incorporated.
ULINEREC4XKIT
383
Page 4
Plugs and RecePtacles: nec/cec HazaRdous location
© November 2016
U-Line™ Factory Sealed 20 Amp Malleable Iron Receptacles
Explosionproof, Dust-Ignitionproof
125 Vac, 20 Amp, 1 HP; 250 Vac, 20 Amp, 2 HP. Dead-Front Safety Construction.
NEC/CEC:
Class I, Division 1 Groups B, C, D
Class I, Division 2 Groups B, C, D
Class II, Division 1 and 2 Groups F, G
Class III
NEMA 3, 3R
Malleable Iron Receptacle and Malleable Iron Mounting Box
125 Vac, 1 HP 250 Vac, 2 HP
These models have separate factory sealed
chamber— suitable for Class I, Group B as well as
Class I, Groups C and D, Class II, Groups F , G and
Class III. No external seals required.
Type Wire/Pole
Single Gang — Class I, Group B
Class I, Division 1 and 2 Groups B, C, D; Class II, Division 1 and 2 Groups F, G; Class III
Dead-End 2W, 3P
Feed-Thru 2W, 3P
Hub Size
(Inches)
1/2 EFSB150-2023M EFSB150-20232M
3/4 EFSB175-2023M EFSB175-20232M
1/2 EFSCB150-2023M EFSCB150-20232M
3/4 EFSCB175-2023M EFSCB175-20232M
Catalog Number
Dead-End Feed-Thru
Single Gang
Class I, Division 1 and 2 Groups B, C, D; Class II, Division 1 and 2 Groups F, G; Class III
Dead-End 2W, 3P
Feed-Thru 2W, 3P
Dead-End Feed-Thru
Suitable for use in Class I, Division 1, Group B
when used with external seals.
1/2 EFS150-2023M EFS150-20232M
3/4 EFS175-2023M EFS175-20232M
1 EFS110-2023M EFS110-20232M
1/2 EFSC150-2023M EFSC150-20232M
3/4 EFSC175-2023M EFSC175-20232M
1 EFSC110-2023M EFSC110-20232M
Seals (not furnished—see Hazardous Location Fittings Section) must be placed within 2 inches from each conduit opening. Seals are not required in Class I,
Division 2 locations.
Shaded area indicates items suitable for Class I, Group B, C and D; Class II, Groups F, G; and Class III.
384
Page 5
Plugs and RecePtacles: nec/cec HazaRdous location
© November 2016
U-Line™ Factory Sealed 20 Amp Malleable Iron Receptacles
Explosionproof, Dust-Ignitionproof
125 Vac, 20 Amp, 1 HP; 250 Vac, 20 Amp, 2 HP. Dead-Front Safety Construction.
NEC/CEC:
Class I, Division 1 Groups B, C, D
Class I, Division 2 Groups B, C, D
Class II, Division 1 and 2 Groups F, G
Class III
NEMA 3, 3R
Malleable Iron Receptacle and Malleable Iron Mounting Box
Type Wire/Pole
Two Gang
Class I, Division 1 and 2 Groups C, D; Class I, Division 2, Groups B, C, D; Class II, Division 1 and 2 Groups F, G; Class III.
Hub Size
(Inches)
1/2 EFS250-2023M EFS250-20232M
125 Vac, 1 HP 250 Vac, 2 HP
Catalog Number
Dead-End Feed-Thru
Malleable Iron Replacement Receptacle Only
2W, 3P EFSR-2023M EFSR-20232M
Spring door replacement assembly (iron) ULSCM
Dead-End 2W, 3P
Feed-Thru 2W, 3P
3/4 EFS275-2023M EFS275-20232M
1 EFS210-2023M EFS210-20232M
1/2 EFSC250-2023M EFSC250-20232M
3/4 EFSC275-2023M EFSC275-20232M
1 EFSC210-2023M EFSC210-20232M
Select items suitable for Class I, Group B, C and D; Class II, Groups F, G; and Class III. See product selection pages for suitable items.
385
Page 6
Plugs and RecePtacles: nec/cec HazaRdous location
© November 2016
U-Line™ Factory Sealed 20 Amp Receptacles
Explosionproof, Dust-Ignitionproof
125 Vac, 20 Amp, 1 HP; 250 Vac, 20 Amp, 2 HP. Dead-Front Safety Construction.
NEC/CEC:
Class I, Division 1 Groups B, C, D
Class I, Division 2 Groups B, C, D
Class II, Division 1 and 2 Groups F, G
Class III
NEMA 3, 3R
Dimensions in Millimeters (Inches)
Single Gang Box
Two Gang Box
Receptacle Cover
Select items suitable for Class I, Group B, C and D; Class II, Groups F, G; and Class III. See product selection pages for suitable items.
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