Choosing an Electrical Switch
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Durable Disconnect Switches
Protected by a steel enclosure, these switches withstand tougher conditions than switches in a plastic housing. Also known as safety switches, they have quick-make/quick-break action to eliminate arcing and prolong switch life. They have a lockout to secure in the off position using a padlock (not included).
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.
Switches with a fuse holder are used where overload protection is needed. When the current exceeds the fuse’s rating, the fuse will blow, interrupting the circuit to prevent the switch from overheating, breaking, or causing a fire. These switches require rejection-style fuse clips when used with UL Class RK1, RK5, or T fuses. Note: Horsepower ratings are based on time-delay fuses installed.
Switches with a viewing window let you see the switch position without opening the enclosure.
For technical drawings and 3-D models, click on a part number.
Switches | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching | Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class | |||||||||||||
Current, A | Voltage | Switch Action | Industry Designation | Electrical Phase (hp) | For No. of Wires | For Fuse Class | Ht. | Wd. | Environmental Rating | Specifications Met | Each | Each | ||
Enamel-Coated Steel with Black/Red Actuator | ||||||||||||||
3 Circuits with Lockout, Safety Interlock, Fuse Holder, Viewing Window | ||||||||||||||
| 200 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (150 hp @ 600 V AC) | 4 | RK1, RK5, J, K5, H | 29" | 17" | NEMA 1 | UL Listed, CSA Certified | 0000000 | 000000000 | 00000000 | 000000 |
Outdoor Durable Disconnect Switches
A raintight NEMA 3R rated enclosure protects these switches from falling liquids and light splashing. The enclosure is steel, so it withstands tougher conditions than plastic enclosures. All have quick-make/quick-break action to eliminate arcing and prolong switch life. They have a lockout to secure in the off position using a padlock (not included).
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.
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.
Switches with a viewing window let you see the switch position without opening the enclosure.
For technical drawings and 3-D models, click on a part number.
Switches | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching | Rejection-Style Fuse Clips for RK1 and RK5 Fuse Class | |||||||||||
| Current, A | Voltage | Switch Action | Industry Designation | Electrical Phase (hp) | For No. of Wires | For Fuse Class | Ht. | Wd. | Each | Each | ||
Gray Enamel-Coated Steel with Black/Red Actuator | ||||||||||||
3 Circuits with Lockout, Safety Interlock, Fuse Holder, Viewing Window | ||||||||||||
| 200 | 600V AC/ 600V DC | Stays Switched (Maintained) | 3PST | Three (150 hp @ 600 V AC) | 4 | RK1, RK5, J, H | 29" | 17" | 0000000 | 000000000 | 00000000 | 000000 |
Automatic Transfer Switches
When the microcontroller inside detects a power outage, these switches automatically fire up a backup generator. They’ll switch back to utility power once power is restored. To prevent injury and damage to your generator, 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. These switches also have built-in overload protection, so they can isolate themselves from utility power to protect your facility. LED status lights let you know which power source is in use. Add a padlock (not included) to the lockout to prevent unauthorized changes to the switch. Rated NEMA 1, these switches should only be used indoors.
They're compatible with generators that have a two-wire remote starting system.
NEMA 3R doors make these switches safe for use outdoors since they seal out rain, snow, and sleet. These doors cover the LED status lights on the switch when closed.
For technical drawings and 3-D models, click on a part number.
Transfer Switches | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Switching | Housing | NEMA 3R Doors | ||||||||||||
| Current | Voltage | Circuit Breaker Breakthrough Current | Industry Designation | Electrical Phase | For Number of Wires | Housing Material | Ht. | Wd. | Dp. | Specifications Met | Each | Each | ||
NEMA 1 | ||||||||||||||
2 Circuits | ||||||||||||||
| 200A | 120V AC | 10,000A | DPDT | Single | 4 | Aluminum | 33" | 18 7/8" | 8 1/4" | UL Listed, UL 1008, NEC Article 702 | 0000000 | 000000000 | 00000000 | 0000000 |
3 Circuits | ||||||||||||||
| 200A | 120V AC | 10,000A | 3PDT | Three | 6 | Aluminum | 33" | 18 7/8" | 8 1/4" | UL Listed, UL 1008, NEC Article 701 | 0000000 | 00000000 | 00000000 | 000000 |