NEMA 3R Switches | McMaster-Carr

Filter by

Environment

System of Measurement

Switching Voltage

Switching Current

Enclosure Rating

Electrical Phase

Current @ Voltage

Actuator Style

Electrical Connection

Number of Wires

Wire Connection

Material

Number of Circuits Controlled

Certification

Color

For Number of Fuses

RoHS

Compliant

Compliant with Exemptions

Sensing Component

Switch Designation

Horsepower @ Switching Voltage

Input Voltage

Number of Terminals

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Exempt

Forward

How can we improve?

61 Products

Airflow-Actuated HVAC Switches

Use this switch to sense changes in airflow velocity in duct. The paddle extends into the duct and actuates the switch when airflow reaches the setpoint. Switch is rated NEMA 3R for protection from dirt, falling liquids, and light splashing.

								Paddle
	Speed Set Point, fpm	Temp. Range, ° F	Current @ Voltage	Electrical Connection	Switch Designation	For Conduit Trade Size	Knockout Dia.	Material	Ht.	Wd.	For Use Outdoors	Enclosure Rating	Certification		Each
Paddle Sensors



		350 to 500	32 to 104	10 amp @ 240V AC 16 amp @ 120V AC	Screw Terminal	SPDT	1/2	7/8"	Stainless Steel	6 7/8"	3 1/8"	Yes	IP43, NEMA 3R	UL Listed, C-UL Listed, CE Marked	1783K13	0000000

Outdoor Durable Disconnect Switches

All switches have quick-make/quick-break action to eliminate arcing and prolong switch life.

Maintained Switch About Maintained Switch

Image of Product. Front orientation. Disconnect Switches. Outdoor Durable Disconnect Switches.

Enamel-Coated Steel Housing and Powder-Coated Steel Housing—The enclosure is steel, so it withstands tougher conditions than plastic enclosures.

Fuse Holder—Use switches with a fuse holder where overload protection is needed. When the current exceeds the rating of the fuse, it blows. This interrupts the circuit and prevents overheating, damage, and fire. When used with UL Class RK1, RK5, or T fuses, they require rejection-style fuse clips. Note: Horsepower ratings are based on time-delay fuses installed.

Lockout—They have a lockout to secure in the off position using a padlock (not included).

Safety Interlock—Switches with safety interlock keep the door closed when the switch is on and prevent the switch from turning on when the door is open.

Viewing Window—Switches with a viewing window let you see the switch position without opening the enclosure.

NEMA 3R Enclosure Rating—A raintight NEMA 3R rated enclosure protects these switches from falling liquids and light splashing.

	Switches															Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class
	Switching
	Current, amp	Voltage	Switch Designation	Electrical Phase (hp)	For No. of Wires	For Fuse UL Class	Ht.	Wd.	For Max. Padlock Shackle Dia.	Wire Connection	Enclosure Rating	Certification	Specs. Met		Each		Each
Gray Enamel-Coated Steel with Black/Red Actuator







				3 Circuits Controlled with Lockout, Safety Interlock, and Viewing Window

				30	600V AC/600V DC	3PST	Single (10 hp @ 240V AC) Three (30 hp @ 600V AC)	3	—	15"	7 3/4"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K91	0000000	———	0


				60	600V AC/600V DC	3PST	Single (30 hp @ 240V AC) Three (60 hp @ 600V AC)	3	—	18 1/2"	9 1/16"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	—	7499K83	000000	———	0




						3 Circuits Controlled with Lockout, Safety Interlock, Fuse Holder, and Viewing Window

						30	600V AC/600V DC	3PST	Three (20 hp @ 600V AC)	3	RK1, RK5, J, H	15"	7 3/4"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K76	000000	7499K111	000000


						30	600V AC/600V DC	3PST	Three (20 hp @ 600V AC)	4	RK1, RK5, J, H	15"	7 3/4"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K93	000000	7499K111	00000
						60	600V AC/600V DC	3PST	Three (50 hp @ 600V AC)	3	RK1, RK5, J, H	17 1/2"	10 1/2"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	Fed. Spec. W-S-865	7499K68	000000	7499K112	00000
						60	600V AC/600V DC	3PST	Three (50 hp @ 600V AC)	4	RK1, RK5, J, H	18 1/2"	9 1/16"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	—	7499K74	000000	7499K112	00000
						100	600V AC/600V DC	3PST	Three (100 hp @ 600V AC)	4	RK1, RK5, J, H	22 1/8"	9 1/16"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	—	7499K75	00000000	7499K113	00000
						200	600V AC/600V DC	3PST	Three (150 hp @ 600V AC)	4	RK1, RK5, J, H	29"	17"	3/8"	Tab	NEMA 3R	UL Listed, CSA Certified	—	7499K77	00000000	7499K114	00000


						Gray Powder-Coated Steel Housing with Red Actuator







										2 Circuits Controlled with Lockout, Safety Interlock, and Fuse Holder

										100	240V AC/250V DC	DPST	Single (15 hp @ 240V AC)	3	RK1, RK5, K5, T, H	17 1/2"	11 3/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K26	000000	7524K413	00000




												2 Circuits Controlled with Lockout and Fuse Holder

												30	240V AC/250V DC	DPST	Single (3 hp @ 240V AC)	3	RK1, RK5, K5, H	8 9/16"	5 7/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K24	00000	7524K411	000000


												60	240V AC/250V DC	DPST	Single (10 hp @ 240V AC)	3	RK1, RK5, K5, H	10 1/16"	6 7/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K25	000000	7524K412	00000




														3 Circuits Controlled with Lockout and Safety Interlock

														100	240V AC/250V DC	3PST	Three (30 hp @ 240V AC)	3	—	17 1/2"	11 3/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K36	000000	———	0




																3 Circuits Controlled with Lockout, Safety Interlock, and Fuse Holder

																100	240V AC/250V DC	3PST	Single (15 hp @ 240V AC) Three (30 hp @ 240V AC)	4	RK1, RK5, K5, T, H	23 1/8"	11 3/4"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K16	000000	7524K413	00000




																3 Circuits Controlled with Lockout and Fuse Holder

		30	240V AC/250V DC													3PST	Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	4	RK1, RK5, K5, H	8 9/16"	5 7/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K14	000000	7524K411	000000


		60	240V AC/250V DC													3PST	Single (10 hp @ 240V AC) Three (15 hp @ 240V AC)	4	RK1, RK5, K5, H	10 1/16"	6 7/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K15	000000	7524K412	00000




																3 Circuits Controlled with Lockout

				30	240V AC/250V DC											3PST	Three (7 1/2 hp @ 240V AC)	3	—	6 3/8"	4 9/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K34	000000	———	0


				60	240V AC/250V DC											3PST	Three (15 hp @ 240V AC)	3	—	8 9/16"	5 7/16"	5/16"	Tab	NEMA 3R	UL Listed	—	7524K35	000000	———	0

Fuse Holders

		Each
Rejection-Style Fuse Clip for T Fuse Class	7524K421	000000

Outdoor Rocker Light Switches

Switch lights on and off no matter the forecast. NEMA 3R rated, these switches have a gasket that blocks out weather. They are rocker switches, so they protrude less off your wall than other switches.

	Switching Current @ Voltage	Terminal Location	Mounting Location	Enclosure Rating	Certification	Choose a Color		Each
Screw-Terminal Wire Connection







	Rocker Switch Actuator—Not Illuminated

	1	2	Maintained	20 amp @ 120V AC/277V AC	Back, Side	Outlet Box	NEMA 3R	UL Listed, C-UL Listed	Gray, Ivory, White	7812N11	000000

Raintight Enclosed Motor Switches

Start and stop motors outdoors and in other wet environments. Rated NEMA 3R, these switches seal out rain and light splashes. They’re housed in a protective aluminum enclosure, so you don’t need to mount them inside an electrical panel. The enclosure is lighter in weight than stainless steel enclosures yet still stands up to water and oil.

In addition to turning motors on and off, these switches work with other circuits, such as lighting and electric heat circuits. They do not provide overload protection.

					Switching
	No. of Circuits Controlled	Electrical Phase (hp)	Switch Starting Position	Switch Designation	Current, amp	Voltage, V AC	Housing Material	Ht.	Wd.	Wire Connection	Environment	Enclosure Rating	Certification	Flammability Rating		Each
Maintained



		2	Single (3 hp @ 240V AC)	2 Off	DPST-NO	30	600	Aluminum	5.8"	4.5"	Screw Terminal	Outdoor, Wet	NEMA 3R	UL Listed, CSA Certified	UL 94 V-2	7657K34	000000


		3	Three (7 1/2 hp @ 240V AC)	3 Off	3PST-NO	30	600	Aluminum	5.8"	4.5"	Screw Terminal	Outdoor, Wet	NEMA 3R	UL Listed, CSA Certified	UL 94 V-2	7657K24	000000

Easy-Clean Touch Light Switches


White ABS Switch for 1 Gang	Stainless Steel Switch for 1 Gang	White ABS Switch for 2 Gang	Replacement Switch

Flat and completely smooth, these switches are easy to wipe down. They’re rated NEMA 3R, so they seal out water that could damage the circuitry. They also won’t corrode from mild cleaning solutions. With just a light tap, you can switch lights on and off, even if you’re wearing gloves.

302-304 Stainless Steel—Switches with a stainless steel wall plate resist wear and tear better than switches with a plastic wall plate.

	Light Switches											Replacement Wall Plates
	For Outlet Box Designation	Wall Plate Material	No. of Circuits Controlled	Switch Action	Message Color	Switching Current @ Voltage	Mounting Location	Enclosure Rating	Certification		Each		Each
3-Way/4-Way Switches with Wire Lead Connection







				Finger Touch Actuator—Not Illuminated

				1 Gang	White ABS	1	Maintained	Black	10 amp @ 120V AC, 8 amp @ 277V AC	Outlet Box	NEMA 3R	UL Listed, C-UL Listed	7826N11	0000000	7826N15	000000


				1 Gang	302-304 Stainless Steel	1	Maintained	Black	10 amp @ 120V AC, 8 amp @ 277V AC	Outlet Box	NEMA 3R	UL Listed, C-UL Listed	7826N12	000000	7826N16	00000
				2 Gang	White ABS	2	Maintained	Black	10 amp @ 120V AC, 8 amp @ 277V AC	Outlet Box	NEMA 3R	UL Listed, C-UL Listed	7826N13	000000	7826N17	00000

Replacement Light Switches

For Outlet Box Designation	No. of Circuits Controlled	Switch Action	Switching Current @ Voltage	Wire Connection	Enclosure Rating	Certification		Each
1 Gang	1	Maintained	10 amp @ 120V AC, 8 amp @ 277V AC	Wire Leads	NEMA 3R	C-UL Listed, UL Listed	7826N14	000000

Enclosed Disconnect Switches


Power Pole	Neutral Pole

Cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance. These switches are housed in a protective enclosure that resists denting, chipping, and cracking. Mount them to the wall when you run out of space in an electrical panel.

Use additional power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three phase system.

Maintained Switch About Maintained Switch

Two-Circuit

Switch with

Lockout

Lockout—Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of _5/16” (not included).

Photovoltaic—Photovoltaic switches can be used with photovoltaic cells which convert sunlight into electricity.

	Switching
	Current, amp	Voltage, V DC	Switch Designation	Ht.	Wd.	For Max. Padlock Shackle Dia.	Wire Connection	Enclosure Rating	Certification		Each
Yellow Plastic Housing with Red Actuator







				2 Circuits Controlled with Lockout/Photovoltaic

				50	800	DPST	12 5/8"	8 11/16"	5/16"	Screw Terminal	IP65 NEMA 3R	UL Listed, C-UL Listed, CE Marked	6759K74	0000000


				63	650	DPST	12 5/8"	8 11/16"	5/16"	Screw Terminal	IP65 NEMA 3R	UL Listed, C-UL Listed, CE Marked	6759K71	000000

Labels

		Each
"Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd.	6759K65	000000

Manual Transfer Switches

NEMA 3R

If there’s a power outage, flip the toggle for each circuit on these switches to backup power. Each circuit can also be turned off completely. To prevent injury and damage to your generators, they are open transition, meaning the contacts disconnect from one power source before connecting to another. This is also known as break-before-make switching.

Use them with a portable generator.

NEMA 3R—NEMA 3R switches can be used outdoors since they seal out rain, snow, and sleet.

Key Lock—Switches with a key lock prevent unauthorized changes to the switch.

						Housing					Mounting
	Max. Power, W	Switching Current (No. of Switches)	Circuit Breaker Breakthrough Current, amp	Electrical Phase	Housing Material	Ht.	Wd.	Dp.	Generator Connection NEMA Type	Generator Connection California Std. Style	Fasteners Included	No. of Holes	Hole Dia.	Features	Certification	Specs. Met		Each
NEMA 3R







				10 Circuits Controlled

				7,500	20 amp @ 240V AC (1 DPDT) 20 amp @ 120V AC (2 SPDT) 15 amp @ 120V AC (6 SPDT)	10,000	Single	Powder-Coated Steel	12 3/4"	12"	5"	L14-30	—	Yes	5	1/4"	Key Lock	UL Listed	UL 1008, NEC Article 702	4272N14	0000000


				12,500	20 amp @ 240V AC (1 DPDT) 20 amp @ 120V AC (2 SPDT) 15 amp @ 120V AC (6 SPDT)	10,000	Single	Powder-Coated Steel	12 3/4"	12"	5"	—	CS6375	Yes	5	1/4"	Key Lock	UL Listed	UL 1008, NEC Article 702	4272N16	000000

Outdoor Set-to-the-Minute High-Current Time and Day Activated Switches

Rated NEMA 3R, these rain-tight switches protect against falling liquids and light splashing. More precise than other time and day switches, they program on/off times for equipment down to the exact minute. They control equipment with high currents, such as landscape lighting, pumps, and heaters. A backup battery maintains the program during a power outage.

24-Hr. Timing Cycle—24-hr. switches repeat the same program daily.

7-Day Timing Cycle—Seven-day switches can perform a different program each day of the week.

365-Day Timing Cycle—Seven-day/365-day switches can perform a different program each day of the week or year, and compensate for leap year and daylight savings time. Override regular programming for up to 99 holidays for any length of time. They can also be used to activate equipment such as bells and signals for just a few seconds.

Astronomical Timing—Switches with astronomical timing can be set to turn lights on and off based on sunrise and sunset.

Day Skipper—Switches with a day skipper can be programmed to skip operation for one to six days.

												Mounting
	No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage, V AC	Max. On/Off Cycles	Min. Set Time, min.	Timing Adjustment Style	Housing Material	Switch Designation	Ht.	Wd.	Dp.	Fasteners Included	Hole Dia.	Knockout Trade Size	Wire Connection	Environment	Certification		Each
24-Hr. Timing Cycle—With Battery Backup, Lockout



		1	30 amp @ 240V AC	120/208/240/277	20 per day	1	Push Button	Polycarbonate	SPST	8 3/8"	5"	3 1/8"	No	0.26"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed	7459K65	0000000


		2	30 amp @ 240V AC	120/208/240/277	20 per day	1	Push Button	Polycarbonate	DPST	8 3/8"	5"	3 1/8"	No	0.26"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed	7459K67	000000


		7 day—With Battery Backup, Lockout, Day Skipper



				2	30 amp @ 240V AC	120/208/240/277	20 per day	1	Push Button	Polycarbonate	DPST	8 3/8"	5"	3 1/8"	No	0.26"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed	7459K86	000000


				7 day—With Battery Backup, Lockout, Day Skipper, Astronomical Timing



						1	30 amp @ 240V AC	120/208/240/277	20 per day	1	Push Button	Polycarbonate	SPDT	8 3/8"	5"	3 1/8"	No	0.26"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed	7459K91	000000


						7 day/365 day—With Battery Backup, Lockout, Astronomical Timing



								1	30 amp @ 240V AC	120/208/240/277	4,000 per yr.	1	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed, CSA Certified	70915K77	000000


								2	30 amp @ 240V AC	120/208/240/277	4,000 per yr.	1	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	1/2, 3/4	Screw Terminal	Outdoor, Wet	UL Listed, CSA Certified	70915K81	000000

Outdoor Time and Day Activated Switches

24-Hr. Timing Cycle

Designed to work with landscape lighting and filter pumps, these switches turn equipment on and off at a set time and day. They control two devices at once, and have three-prong outlets to plug devices directly into the switch. All have an override to bypass the programmed on/off settings.

24-Hr. Timing Cycle—24-hr. switches repeat the same program daily. Position trippers around the clock dial to set on and off times.

NEMA 3R Enclosure Rating—NEMA 3R rated switches are protected against falling liquids and light splashing.

Light Sensor Control—Switches with light sensor control allow one device to be controlled by the presence or absence of light.

												Electrical			Mounting
	Max. On/Off Cycles, per day	Min. Set Time, min.	Timing Adjustment Style	Tripper Type	No. of Trippers	Switching Current @ Voltage	No. of Outlets	Features	Ht.	Wd.	Dp.	Connection	No. of Blades	Cord Lg., ft.	Fasteners Included	No. of Holes	Hole Dia.		Each
24-Hr. Timing Cycle—NEMA 3R



		12	30	Tripper	Removable	4	15 amp @ 120V AC	2	Light Sensor Control	9 3/8"	5 1/2"	3 3/8"	Straight Blade	3	2	No	4	1/4"	7185K26	0000000

Trippers

		Pkg.
Additional Trippers (Pkg. of 2 Pairs)	7993K71	00000

Outdoor High-Current Time and Day Activated Switches

Rated NEMA 3R, these rain-tight switches protect against falling liquids and light splashing. They control equipment with high currents, such as landscape lighting, pumps, and heaters. Program them to turn a device on and off at a set time and day. Position trippers around the clock dial to set on and off times.

24-Hr. Timing Cycle—24-hr. switches repeat the same program daily.

7-Day Timing Cycle—Seven-day switches can perform a different program each day of the week.

Day Skipper—Switches with a day skipper can be programmed to skip operation for one to six days.

Trippers—Additional trippers (sold separately) are sold in pairs that include one “on” tripper and one “off” tripper.

	Switches															Trippers
	No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage, V AC	Max. On/Off Cycles, per day	Min. Set Time	Tripper Type	No. of Trippers	Housing Material	Switch Designation	Ht.	Wd.	Dp.	Wire Connection		Each	No. of Trippers Included		Pkg.
24-Hr. Timing Cycle



		1	40 amp @ 240V AC	120	12	1 hr.	Removable	2	Steel	SPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminal	7037K81	0000000	1 Pair	7037K32	00000


		2	40 amp @ 240V AC	120/208/240/277	48	15 min.	Captive	96	Polycarbonate	DPDT	8 7/8"	6 5/8"	3"	Screw Terminal	7037K15	00000	—	———	0
		2	40 amp @ 240V AC	120	12	1 hr.	Removable	2	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminal	7037K83	000000	1 Pair	7037K32	0000
		2	40 amp @ 240V AC	208/240/277	12	1 hr.	Removable	2	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminal	7037K84	000000	1 Pair	7037K32	0000


		24-Hr. Timing Cycle with Day Skipper and Three Skip Screws



				2	40 amp @ 240V AC	120	10	1 hr.	Removable	2	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminal	7037K89	000000	1 Pair	7037K42	0000


				2	40 amp @ 240V AC	208/240/277	10	1 hr.	Removable	2	Steel	DPST	9 3/8"	5 1/2"	3 5/8"	Screw Terminal	7037K91	000000	1 Pair	7037K42	0000


				7-Day Timing Cycle



						2	40 amp @ 240V AC	120/208/240/277	6	2 hr.	Captive	96	Polycarbonate	DPDT	8 7/8"	6 5/8"	3"	Screw Terminal	79915K59	000000	—	———	0


						4	40 amp @ 240V AC	120	3	3.5 hr.	Removable	14	Steel	4PST	12 1/2"	8 1/4"	4"	Screw Terminal	79915K68	000000	7 Pair	79915K71	00000

Screws