NEMA L7-20 Connectors | McMaster-Carr

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NEMA Style

L7-20

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Voltage

277V AC

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20 amp

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Electrical Connection

Shape

Color

Receptacle Type

Application

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19 Products

About NEMA Plugs, Sockets, and Receptacles

Turn-Lock Plugs, Sockets, and Receptacles

A quarter turn locks these connectors in place to remain secure in high-vibration applications and prevent accidental disconnection.

Receptacles for outlet boxes fit standard wall plates (not included).

For technical drawings and 3-D models, click on a part number.

Three-Blade Plugs

NEMA L7-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Specifications Met	Color		Each
L7-20	277V AC	20A	2.2"	Screw Terminals	0.23"-1.15"	UL Listed, CSA Certified	Black	0000000	000000

Three-Blade 90° Elbow Plugs

NEMA L7-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Specifications Met	Color		Each
L7-20	277V AC	20A	2.6"	Screw Terminals	0.23"-1.15"	UL Listed	Black	000000	000000

Three-Slot Sockets

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Specifications Met	Color		Each
L7-20	277V AC	20A	2.2"	Screw Terminals	0.23"-1.15"	UL Listed, CSA Certified	Black	000000	000000

Three-Slot Single Female Receptacles

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	Face Dia.	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Specifications Met	Color		Each
L7-20	277V AC	20A	1.6"	Screw Terminals	Back, Side	Outlet Box	UL Listed, CSA Certified	Black	0000000	000000

Three-Slot Panel-Mount Female Receptacles

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	For Panel Cutout Dia.	Specifications Met	Color		Each
L7-20	277V AC	20A	Screw Terminals	Back, Side	2.1"	UL Listed, CSA Certified	Gray	0000000	000000

Three-Blade Panel-Mount Male Receptacles

NEMA L7-20 Male

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	For Panel Cutout Dia.	Specifications Met	Color		Each
L7-20	277V AC	20A	Screw Terminals	Back, Side	2.1"	UL Listed, CSA Certified	Gray	0000000	000000

Premium Turn-Lock Plugs, Sockets, and Receptacles

Also known as twist-lock devices, these connectors are built to handle tough, repetitive-use applications, and are more durable than standard turn-lock connectors. A quarter turn locks them in place to remain secure in high-vibration applications and prevent accidental disconnection.

Receptacles for outlet boxes fit standard wall plates (not included).

For technical drawings and 3-D models, click on a part number.

Three-Blade Plugs

NEMA L7-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color	Environmental Rating	Specifications Met		Each
L7-20	277V AC	20A	2.3"	Screw Terminals	0.36"-0.93"	Black	IP20	UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 94 HB, UL 498	00000000	000000

Three-Slot Sockets

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color	Environmental Rating	Specifications Met		Each
L7-20	277V AC	20A	2.3"	Screw Terminals	0.36"-0.93"	Black	IP20	UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 94 HB, UL 498	00000000	000000

Three-Slot Single Female Receptacles

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	Face Dia.	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Color	Environmental Rating	Specifications Met		Each
L7-20	277V AC	20A	1.6"	Screw Terminals	Back, Side	Outlet Box	Black	IP20	UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 94 V-2, UL 498	00000000	000000

Three-Slot Panel-Mount Female Receptacles

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	For Panel Cutout Dia.	Color	Environmental Rating	Specifications Met		Each
L7-20	277V AC	20A	Screw Terminals	Back	2.1"	White	IP20	UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 94 V-2, UL 498	00000000	000000

Washdown Turn-Lock Connectors and Cords

When mated, connectors meet NEMA 6P for protection against corrosion and washdowns. All have a multiple-ring seal and rubber housing to keep out liquid. They resist heat, oil, and chemicals. A quarter turn locks them in place to remain secure in high-vibration applications and prevent accidental disconnection.

Plugs mate with female receptacles and female sockets with an attached cover.

Male receptacles mate with female sockets without an attached cover.

For technical drawings and 3-D models, click on a part number.

Three-Blade Plugs

NEMA L7-20 Male

Plugs									Caps for Plugs
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each		Each
Grounded
L7-20	277V AC	20A	2.5"	Screw Terminals	0.38"-0.69"	Yellow	000000000	000000	000000000	000000

Three-Slot Sockets

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each
L7-20	277V AC	20A	2.5"	Screw Terminals	0.38"-0.69"	Yellow	000000000	000000

Three-Slot Sockets with Attached Cover

NEMA L7-20 Female

Sockets									Replacement Caps for Sockets
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Color		Each		Each
Grounded
L7-20	277V AC	20A	2.5"	Screw Terminals	0.38"-0.69"	Yellow	000000000	000000	000000000	000000

Three-Slot Single Female Receptacles with Attached Cover

NEMA L7-20 Female

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Color		Each
L7-20	277V AC	20A	Screw Terminals	Back, Front, Side	Outlet Box	Yellow	000000000	000000

Outlet Box—3/4 NPT Female Conduit Connection	00000000	Each	000000
Outlet Box—1/2 NPT Female Conduit Connection	00000000	Each	00000

Three-Blade Single Male Receptacles with Attached Cover

NEMA L7-20 Male

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Color		Each
L7-20	277V AC	20A	Screw Terminals	Back, Front, Side	Outlet Box	Yellow	000000000	000000

Outlet Box—3/4 NPT Female Conduit Connection	00000000	Each	000000
Outlet Box—1/2 NPT Female Conduit Connection	00000000	Each	00000