Clamp-On Circuit Breaker Lockouts
A lockout for every style of circuit breaker switch—these lockouts clamp over your switch, so it doesn’t matter if it has a through hole. Secure these lockouts with a padlock. Less disruptive than locking access to an entire panel, they isolate a single circuit or group of circuits. These lockouts help you comply with OSHA 29 CFR 1910.147 requirements for the control of electrical circuits to prevent injuries.
Single-pole lockouts secure a single switch.
Use mounting cleats for switches with a recess that’s too large for your lockout. To prevent accidental flipping when locked out, attach the cleat to your lockout and it will wedge into your switch’s recess.


Style C have a large plastic knob that’s easy to tighten, even if you’re wearing gloves.
For Max. Switch | Overall | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Voltage | Wd. | Thick. | Lg. | Wd. | Dp. | For Circuit Breaker Type | For Manufacturer | For Max. No. of Padlocks | For Max. Padlock Shackle Dia. | Temp. Range, °F | Color | Includes | Each | |
Plastic | ||||||||||||||
120V AC 277V AC | 5/8" | 3/8" | 2" | 1 1/8" | 1 1/2" | Single Pole | ABB, Airpax, Cutler-Hammer, Federal Pacific Electric, Fuji, General Electric, Merlin Gerin, Siemens, Square D, Thomas & Betts, Westinghouse | 1 | 9/32" | 0° to 175° | Red | Mounting Cleat | 00000000 | 000000 |
480V AC 600V AC | 1 1/2" | 1/2" | 2 3/4" | 2 5/16" | 2" | Single Pole | ABB, American Circuit Breakers, Challenger, Cutler-Hammer, Federal Pacific Electric, General Electric, Merlin Gerin, Siemens, Square D, Westinghouse | 1 | 9/32" | 0° to 175° | Red | Mounting Cleat | 00000000 | 00000 |
480V AC 600V AC | 2 1/4" | 7/8" | 3 3/4" | 3 3/4" | 2 1/2" | Single Pole | Cutler-Hammer, General Electric, Merlin Gerin, Siemens, Square D, Westinghouse | 1 | 5/16" | 0° to 175° | Red | __ | 00000000 | 00000 |
Circuit Breaker Lockouts


Installed (Padlock and
Cable Tie Not Included)
Lock out circuit breaker switches with a through-hole to prevent accidental start-ups. These lockouts have pins that fit in the hole for a more secure hold than clamp-on lockouts. Less disruptive than locking access to an entire panel, they secure with a padlock to isolate a single circuit. These lockouts help you comply with OSHA 29 CFR 1910.147 requirements for the control of electrical circuits to prevent injuries.
Lockouts with a cable tie slot let you insert a tie so you can apply lockout tags directly to the lockout instead of attaching them to a padlock. This adds an extra layer of security—even after you remove your padlock, these lockouts won’t open until you cut off your cable tie. To secure multiple lockouts with one tie, run one through adjacent lockouts.
Snap-on lockouts have two halves that snap together over your switch to insert the pins inside. There are two slots to fit different switch sizes. With space to fit two cables ties, two people can add a tag to these lockouts. Or, you can weave a single cable tie through both slots.
Overall | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Circuit Breaker Lockout Type | For Voltage | Lg. | Wd. | Dp. | For Circuit Breaker Type | For Manufacturer | For Max. No. of Padlocks | For Max. Padlock Shackle Dia. | Temp. Range, °F | Color | Specifications Met | Each | |
Lockouts | |||||||||||||
Plastic | |||||||||||||
Snap On | 120V AC | 2 1/8" | 13/16" | 5/16" | Single Pole | Challenger, Cutler-Hammer, General Electric, Siemens, Square D, Westinghouse | 1 | 9/32" | 0° to 175° | Red | OSHA Compliant 29 CFR 1910.147 | 00000000 | 00000 |
Lockouts with Cable Tie Slot | |||||||||||||
Plastic | |||||||||||||
Snap On | 120V AC | 2 11/16" | 1" | 5/8" | Single Pole | Challenger, Cutler-Hammer, General Electric, Siemens, Square D, Westinghouse | 1 | 9/32" | 0° to 245° | Red | OSHA Compliant 29 CFR 1910.147 | 000000000 | 0000 |