About NEMA Plugs, Sockets, and Receptacles
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On/Off Temperature Controllers for Plug-in Heaters
Switch heaters on or off when your process reaches a certain temperature. Both these controllers and your heater will be powered by the same wall outlet. Place the probe into your process, plug the controller into an outlet, and plug your heater into the socket on the back of the controller’s plug. These simple temperature controllers deliver either full power or no power. They’re best used in systems where temperatures change slowly and you don’t need precise control.
IP20 and NEMA 1 rated controllers are best for indoor use. They keep dirt out and will stop objects about the size of a finger from coming into contact with a live circuit.
IP66 and NEMA 4X rated controllers seal out dirt, corrosive liquids, and water from high-pressure washdowns.
Mechanical Relay | Probe | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperature Control Range | No. of Outputs | Output Type | Industry Designation | Max. Switching Current @ Voltage | Reset Type | Dia. | Lg. | Cable Lg., ft. | Input Voltage  | Ht. | Wd. | Dp. | Each | |
IP20 and NEMA 1—DIN-Rail and Wall Mounting | ||||||||||||||
| -40° to 212° F -40° to 100° C | 1 | Heating—One Mechanical Relay | SPDT-NO | 12 A @ 120 V AC | Automatic | 1/4" | 2" | 6 | 120V AC | 5" | 2 7/16" | 2 1/2" | 0000000 | 0000000 |
IP66 and NEMA 4X—Wall Mounting | ||||||||||||||
| -40° to 212° F -40° to 100° C | 1 | Heating—One Mechanical Relay | SPDT-NO | 12 A @ 120 V AC | Automatic | 1/4" | 2" | 6 | 120V AC | 6 5/8" | 2 13/16" | 2 13/16" | 0000000 | 000000 |
Adjustable-Power Temperature Controllers for Plug-In Heaters
Regulate the amount of power flowing to your heater with the turn of a dial. Instead of a temperature sensor or input, these controllers work like a dimmer on a light switch. To incorporate them, first plug in the temperature controller, then plug your heater into the socket on the bottom of the controller. These controllers are NEMA rated for use in hazardous, corrosive, dusty, and washdown environments.
Plug | Socket | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Output Voltage Range | Current, A | Input Voltage | Type | NEMA Style | End Shape | NEMA Style | End Shape | Cord Lg., ft. | Ht. | Wd. | Dp. | Environmental Rating | Each | |
| 36V AC to 120V AC | 10 | 120V AC | Three Prong | 5-15 | Straight | 5-15 | Straight | 6 | 4 5/8" | 2 11/16" | 2" | NEMA 4X, NEMA 7 | 000000 | 000000 |
Temperature-Controlled Outlet Splitters
Automatically power heating and cooling devices on and off when temperatures rise or drop. With two outlets each, you can run multiple devices. Plug them into a standard wall outlet.
Heating outlet splitters turn the power on when your space drops below a set temperature. They cut the power once temperatures warm up. Splitters that turn on at 20° F are often used to switch on engine and battery heaters when working in cold temperatures. Splitters that turn on at 35° F work best with heaters to warm a space and prevent freezing.
Cooling outlet splitters turn the power on when your space rises above a set temperature. They’re often used to turn on fans or other devices for cooling, ventilation, and air circulation. These outlet splitters cut the power once temperatures cool off.
| On/Off Temp. | No. of Outlets | Current, A | Voltage | Material | Specifications Met | Color | Each | |
NEMA 5-15 Plug × NEMA 5-15 Socket | ||||||||
|---|---|---|---|---|---|---|---|---|
Heating/Power | ||||||||
| 20° F On, 30° F Off | 2 | 15 | 120V AC | Plastic | UL Listed, C-UL Listed | White | 0000000 | 000000 |
| 35° F On, 45° F Off | 2 | 15 | 120V AC | Plastic | UL Listed, C-UL Listed | White | 0000000 | 00000 |
Cooling/Power | ||||||||
| 78° F On, 70° F Off | 2 | 15 | 120V AC | Plastic | UL Listed, C-UL Listed | Red | 0000000 | 00000 |