Isolated Ground Outlets | McMaster-Carr

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20 Products

About NEMA Straight-Blade Plugs, Connectors, and Receptacles

About NEMA Plugs, Sockets, and Receptacles

Interference-Limiting Straight-Blade Receptacles and Plugs

Protect computers and other sensitive equipment from electromagnetic interference (EMI).

Receptacles have a ground terminal that is insulated from the mounting strap so you can run an isolated ground wire through the conduit. Also known as isolated ground receptacles. They fit standard wall plates (not included).

Plugs do not limit EMI on their own. Some are orange to match receptacles.

Note: The current rating of your plug should not exceed that of your receptacle.

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

Three-Blade Plugs

NEMA 5-15 Male

NEMA 5-20 Male

Grounded
NEMA Style	Voltage	Current	OD	Wire Connection Type	For Cable OD	Specifications Met	Color		Each
5-15	125V AC	15A	1.5"	Screw Terminals	0.25"-0.66"	UL Listed, CSA Certified	Orange	0000000	000000
5-20	125V AC	20A	1.5"	Screw Terminals	0.34"-0.64"	__	Black	0000000	00000

Three-Slot Single Female Receptacles

NEMA 5-15 Female

NEMA 5-20 Female

Grounded
NEMA Style	Voltage	Current	Face Dia.	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Features	Specifications Met	Color		Each
5-15	125V AC	15A	1.4"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	UL Listed, CSA Certified	Orange	0000000	000000
5-20	125V AC	20A	1.4"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	UL Listed, CSA Certified	Orange	0000000	00000

Three-Slot Duplex Female Receptacles

NEMA 5-15 Female

NEMA 5-20 Female

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Features	Specifications Met	Color		Each
5-15	125V AC	15A	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 498	Orange	0000000	000000
5-20	125V AC	20A	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	UL Listed, CSA Certified, Fed. Spec. W-C-596, UL 498	Orange	0000000	00000

Three-Slot Quad Female Receptacles

NEMA 5-15 Female

NEMA 5-20 Female

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Features	Specifications Met	Color		Each
5-15	125V AC	15A	Screw Terminals	Back	Outlet Box	Green Triangle, Isolated Ground Connection	UL Listed, CSA Certified	Orange	0000000	000000
5-20	125V AC	20A	Screw Terminals	Back	Outlet Box	Green Triangle, Isolated Ground Connection	UL Listed, CSA Certified	Orange	0000000	00000

Interference-Limiting Turn-Lock Receptacles

Protect computers and other sensitive equipment from electromagnetic interference (EMI). Also known as isolated ground receptacles, they have a ground terminal that is insulated from the mounting strap so you can run an isolated ground wire through the conduit. When mated with a plug, a quarter turn locks them in place to remain secure in high-vibration applications and prevent accidental disconnection. Receptacles fit standard wall plates (not included).

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

Three-Slot Single Female Receptacles

NEMA L5-15 Female

NEMA L5-20 Female

NEMA L5-30 Female

NEMA L6-15 Female

NEMA L6-20 Female

NEMA L6-30 Female

Grounded
NEMA Style	Voltage	Current	Face Dia.	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Features	Color		Each
L5-15	125V AC	15A	1.4"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	000000
L5-20	125V AC	20A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000
L5-30	125V AC	30A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000
L6-15	250V AC	15A	1.4"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000
L6-20	250V AC	20A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000
L6-30	250V AC	30A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000

Three-Slot Duplex Female Receptacles

NEMA L5-15 Female

NEMA L6-15 Female

Grounded
NEMA Style	Voltage	Current	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Features	Color		Each
L5-15	125V AC	15A	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	000000
L6-15	250V AC	15A	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000

Four-Slot Single Female Receptacles

NEMA L14-20 Female

NEMA L14-30 Female

Grounded
NEMA Style	Voltage	Current	Face Dia.	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Features	Color		Each
L14-20	125V AC/250V AC	20A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	000000
L14-30	125V AC/250V AC	30A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000

Five-Slot Single Female Receptacles

NEMA L21-20 Female

NEMA L21-30 Female

Grounded
NEMA Style	Voltage	Current	Face Dia.	Wire Connection Type	Receptacle Terminal Location	Mounting Location	Features	Color		Each
L21-20	120V AC/208V AC	20A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	000000
L21-30	120V AC/208V AC	30A	1.6"	Screw Terminals	Back, Side	Outlet Box	Green Triangle, Isolated Ground Connection	Orange	0000000	00000