NEMA 2 Switches | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	For Panel Cutout Diameter For Panel Cutout Diameter

1 3/16"

30 mm

	Reset Type Reset Type

Pull

Twist

	Push-Button Style Push-Button Style

	Mushroom

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 Off (Normally Open) and
1 On (Normally Closed)

1 Off (Normally Open) or 1
On (Normally Closed)

1 On (Normally Closed)

2 Off (Normally Open) or 2
On (Normally Closed)

2 On (Normally Closed)

	Actuator Style Actuator Style


Push Button	Foot Pedal

	Switching Voltage Switching Voltage

	Illumination Illumination

Not Illuminated

Illuminated

	Number of Terminals Number of Terminals

	Actuator Color Actuator Color

	Red

	Actuator Base Material Actuator Base Material

Metal

Plastic

	Switch Action Switch Action

Stays Switched (Maintained)

Springs Back (Momentary)

	Environment Environment

	Number of Circuits Controlled Number of Circuits Controlled

	Maximum Voltage Maximum Voltage

600V AC

250V DC

	Switching Current Switching Current

20A

	Push-Button Shape Push-Button Shape

Round

	Mounting Location Mounting Location

Panel

	Diameter Diameter

1 1/2"

	Industry Designation Industry Designation

	Environmental Rating Environmental Rating	Show

NEMA 2

	Environmental Rating Environmental Rating	Hide

Warning: Products have one, but not necessarily all, of the selected characteristics.

Associated Apparatus for
IEC Zone 0 Groups IIC,
IIB, IIA

Associated Apparatus for
IEC Zone 20 Groups IIIC,
IIIB, IIIA

IEC Zone 0 Groups IIC,
IIB, IIA

IEC Zone 1 Groups IIC,
IIB, IIA

IEC Zone 2 Groups IIC,
IIB, IIA

IEC Zone 20 Groups
IIIC, IIIB, IIIA

IEC Zone 21 Groups
IIIC, IIIB, IIIA

NEC Class I Division 1
Groups A, B, C, D

NEC Class I Division 1
Groups B, C, D

NEC Class I Division 2
Group D

NEC Class I Division 2
Groups A, B, C, D

NEC Class I Division 2
Groups B, C, D

NEC Class I Divisions
1, 2 Group D

NEC Class I Divisions
1, 2 Groups A, B, C, D

NEC Class I Divisions
1, 2 Groups B, C, D

NEC Class I Divisions
1, 2 Groups C, D

NEC Class II Division 1
Groups E, F ,G

NEC Class II Division 2
Groups F, G

NEC Class II Divisions
1, 2 Groups E, F, G

NEC Class II Divisions
1, 2 Groups F, G

NEC Class III
Divisions 1, 2

NEC Zone 1 Group IIA

NEC Zone 1 Groups
IIB, IIA

NEC Zone 1 Groups
IIC, IIB, IIA

NEC Zone 2 Groups
IIB, IIA

	Bulb Voltage Bulb Voltage

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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Choosing an Electrical Switch

About Hazardous Location Environmental Ratings

30 mm Emergency Stop Panel-Mount Push-Button Switches

Immediately cut power with a single push. These switches are rated for protection from low-pressure streams of water and oil/coolant spraying. They have positive force contacts that will open a circuit when actuated even if a spring fails or the contacts stick. Switches include enough contact blocks to control the number of circuits listed.

Turn twist switches back on by twisting the button and pull switches by pulling it. Add an optional lockout on either kind to cover the button and prevent changes its position.

Note: Illuminated switches include a bulb. If wiring the switch and the bulb to the same circuit, the circuit voltage must not exceed bulb voltage.

Additional contact blocks (sold separately) can be added to control more circuits, or to replace the included contact block.

Pull Reset

Twist Reset

Illuminated Pull Reset

Metal Base with Screw Terminals
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Actuator Color	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	For Max. No. of Contact Blocks	Choose a Bulb Voltage		Each
Pull Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
Twist Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
Metal Base with Screw Terminals—Illuminated
Pull Reset
1	1 Off (Normally Open)	Stays Switched (Maintained)	4	SPST-NO	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 1/16"	4	24V AC/24V DC, 120V AC/120V DC	0000000	000000
1	1 On (Normally Closed)	Stays Switched (Maintained)	4	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 1/16"	4	240V AC/240V DC	00000000	000000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	6	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 15/16"	4	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	6	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	2 15/16"	4	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000
Plastic Base with Screw Terminals
Pull Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	00000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
Twist Reset
1	1 On (Normally Closed)	Stays Switched (Maintained)	2	SPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	00000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000
2	2 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-NC	Red	6 A @ 120 V AC, 5 A @ 24 V DC	250V DC 600V AC	1 1/2"	1 1/2"	8	__	00000000	000000

Contact Blocks

For 1 1/2" Diameter Switches
No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation		Each
1	1 Off (Normally Open)	2	SPST-NO	00000000	000000
1	1 On (Normally Closed)	2	SPST-NC	00000000	00000

Replacement Actuators for 1 1/2" Diameter Switches

					Pull Reset		Twist Reset
Actuator Clarity	Actuator Color	Bulb Type	Bulb Color	Choose a Bulb Voltage		Each		Each
Metal Base—Not Illuminated
Opaque	Red	__	__	__	00000000	000000	00000000	000000
Metal Base—Illuminated
Clear	Red	LED	Red	24V AC/24V DC, 120V AC/120V DC, 240V AC/240V DC	0000000	000000	000000	00
Plastic Base—Not Illuminated
Opaque	Red	__	__	__	00000000	00000	00000000	00000

Replacement Bulbs for Pull Reset Switches

Replacement Bulb

	Bulb
Voltage	Shape Number	Diameter	Overall Length	Bulb Material	Color	Light Technology	Rated Life, hrs.		Each
For 1 1/2" Diameter Switches
For Switches with 24V AC/24V DC Bulb
24V AC, 24V DC	T3 1/4	3/8"	1 1/8"	Plastic	Red	LED	100,000	00000000	000000
For Switches with 120V AC/120V DC Bulb
130V AC, 130V DC	T3 1/4	3/8"	1 1/8"	Plastic	Red	LED	100,000	00000000	00000

Optional Lockouts for 1/2" Diameter Switches

For Maximum Padlock Shackle Diameter		Each
1/4"	00000000	000000

Hazardous Location Foot Switches

With One Pedal

With Two Pedals

These switches are rated for environments where hazardous material is present. Press the pedal with your foot for hands-free operation. They have an oversized guard that accommodates bulky footwear.

Hazardous location environmental ratings indicate whether manufacturers have included safety features in products to facilitate their safe use in a hazardous environment. Before selecting a product for a hazardous location, ensure it is rated for your environment. See About Hazardous Location Environmental Ratings.

					Mounting
No. of Circuits Controlled	Switch Starting Position	Switch Action	Industry Designation	Switching Current @ Voltage	Fasteners Included	No. of Holes	Hole Dia.	Environmental Rating		Each
1 Speed with Screw Terminals
Aluminum Housing with 1 Pedal, Oversized Guard, and Back Pivot
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	20 A @ 125 V AC/250 V AC	No	6	0.28"	NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9	0000000	0000000
2	2 Off (Normally Open) or 2 On (Normally Closed)	Springs Back (Momentary)	DPDT	20 A @ 125 V AC/250 V AC	No	6	0.28"	NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9	0000000	000000
Aluminum Housing with 2 Pedals, Oversized Guard, and Back Pivot
2	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	20 A @ 125 V AC/250 V AC	No	6	0.28"	NEC Class I Divisions 1, 2 Group D NEC Class II Divisions 1, 2 Groups F, G NEC Zone 1 Group IIA IP41 NEMA 2 NEMA 7 NEMA 9	0000000	000000