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. Tie-bar multipole lockouts are wider than single-pole lockouts to fit onto most tie bars, which control multiple circuits.
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.
Lockouts with a cable tie slot let you apply tags directly to the lockout instead of attaching them to a padlock. To secure multiple lockouts with one tag, run one cable tie through adjacent lockouts. These lockouts won’t open until the padlock is removed and your cable tie is cut. There are slots for up to three ties for group lockouts.
Style A have a two-piece design that’s easy to install—no tools or tightening required. Place one piece over the switch and slide on the second piece to mount.
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 | Each | |
Plastic | |||||||||||||
| 120V AC | 5/8" | 3/8" | 1 1/16" | 2 1/4" | 13/16" | Single Pole | American Circuit Breakers, Cutler-Hammer, GE, Merlin Gerin, Siemens, Square D | 1 | 9/32" | 0° to 250° | Red | 000000000 | 00000 |
Style B have a compact profile for breaker boxes with tight clearance. Use a flat-head screwdriver to tighten them onto your switch. These lockouts have a warning label on the front for visibility. Made of 100% recycled materials, they’re rated UL 2809-2 to meet purchasing requirements in LEED-certified facilities.
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 | Message | Each | |
Plastic | ||||||||||||||
| 120V AC 240V AC | 5/8" | 7/16" | 1" | 3/4" | 2" | Single Pole | American Circuit Breakers, Cutler-Hammer, GE, Merlin Gerin, Siemens, Square D | 1 | 9/32" | -40° to 250° | Red | Danger—Locked Out—Do Not Operate | 000000000 | 000000 |
| 120V AC 277V AC | 5/8" | 7/16" | 1" | 1 5/8" | 2" | Tie-Bar Multipole | American Circuit Breakers, Cutler-Hammer, GE, Merlin Gerin, Siemens, Square D | 1 | 9/32" | -40° to 250° | Red | Danger—Locked Out—Do Not Operate | 000000000 | 00000 |
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 | Features | 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 |
| 120V AC 277V AC | 2 5/8" | __ | 1 3/8" | 1 1/16" | 1 1/4" | Single Pole | ABB, Airpax, American Circuit Breakers, American Switch, Bryant, Challenger, Cutler-Hammer, Federal Pacific Electric, Fuji, GE, Heinemann, Lemag, Merlin Gerin, Siemens, Square D, Thomas & Betts | 1 | 9/32" | -40° to 230° | Red | Cable Ties, Mounting Cleat | Cable Tie Slot | 000000000 | 00000 |
| 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 |
| 480V AC 600V AC | 2 1/4" | 7/8" | 4 1/8" | 3 3/4" | 2 3/8" | Single Pole | American Circuit Breakers, Cutler-Hammer, GE, Merlin Gerin, Siemens, Square D, Westinghouse | 1 | 9/32" | 0° to 175° | Red | Cable Ties | Cable Tie Slot | 000000000 | 00000 |
| 480V AC 600V AC | 3 3/4" | __ | 1 7/8" | 2 3/16" | 3 3/16" | Single Pole | ABB, American Circuit Breakers, Challenger, Cutler-Hammer, GE, Merlin Gerin, Siemens, Square D, Westinghouse | 1 | 9/32" | 0° to 175° | Red | Cable Ties, Mounting Cleat | Cable Tie Slot | 000000000 | 00000 |
Style D have a slotted metal knob you can tighten by hand or with a flat-head screwdriver. With durable metal hinge points, they’ll stand up to repeated use.
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 240V AC | __ | 3/8" | 2 1/16" | 3/4" | 1 7/16" | Tie-Bar Multipole | Cutler-Hammer, GE, Schneider Electric, Siemens, Square D, Westinghouse | 1 | 9/32" | -40° to 200° | Red | __ | 000000000 | 000000 |
| 480V AC 600V AC | 13/16" | 9/16" | 3" | 1" | 1 3/4" | Single Pole | ABB, Cutler-Hammer, GE, Schneider Electric, Siemens, Square D, Westinghouse | 1 | 9/32" | -40° to 200° | Red | Mounting Cleat | 000000000 | 00000 |
| 480V AC 600V AC | 2 3/4" | 1" | 4 1/16" | 3 3/8" | 1 7/8" | Single Pole | ABB, Cutler-Hammer, Schneider Electric, Siemens, Square D, Westinghouse | 1 | 9/32" | -40° to 200° | Red | Mounting Cleat | 000000000 | 00000 |
Circuit Breaker Lockouts
Installed (Padlock and
Cable Tie Not Included)
Shown 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.
Pin-in lockouts are faster to install than snap-on lockouts. Press the button on the end to open the pins, then slide the lockout over your switch.
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 |
| Pin In | 120V AC | 2 7/16" | 15/16" | 3/4" | Single Pole | American Switch, Cutler-Hammer, Siemens, Square D | 1 | 9/32" | 0° to 245° | Red | OSHA Compliant 29 CFR 1910.147 | 000000000 | 00000 |
Tie-Bar Circuit Breaker Lockouts
Shown Installed (Padlock
and Cable Tie Not Included)
From a single point, lock out multiple breaker switches—these lockouts wrap around an entire tie bar so it won’t budge. Compared to clamp-on lockouts, they’re more secure because they affix below the switch. They lock with a padlock to keep circuits closed during maintenance. Less disruptive than locking out an entire panel, they lock out one tie bar. You can’t use them on single-pole switches. 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. Run one cable tie through adjacent lockouts to secure them all.
Overall | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Voltage | Lg. | Wd. | Dp. | For Circuit Breaker Type | For Circuit Breaker Switch Type | For Manufacturer | For Max. No. of Padlocks | For Max. Padlock Shackle Dia. | Temp. Range, °F | Color | Specifications Met | Features | Each | |
Plastic | ||||||||||||||
| 120V AC, 277V AC | 2 1/4" | 1 1/4" | 1 1/16" | Tie-Bar Multipole | Through Hole, No Hole | Bryant, Challenger, Crouse-Hinds, Cutler-Hammer, GE, General Switch, ITE, Proteus, Siemens, Square D, Sylvania, Westinghouse | 1 | 9/32" | 0° to 175° | Red | OSHA Compliant 29 CFR 1910.147 | __ | 00000000 | 000000 |
| 120V AC, 277V AC | 2 7/16" | 2 1/8" | 1 5/16" | Tie-Bar Multipole | Through Hole, No Hole | American Switch, Bryant, Challenger, Crouse-Hinds, Cutler-Hammer, Federal Pacific Electric, Frank Adams, GE, General Switch, ITE, Siemens, Square D, Sylvania, Thomas & Betts, Westinghouse, Zinsoo | 1 | 9/32" | 0° to 175° | Red | OSHA Compliant 29 CFR 1910.147 | Cable Tie Slot | 000000000 | 00000 |
Circuit Breaker Group Lockouts
Secure a single breaker switch with multiple padlocks to keep electricity safely off until the entire team is finished with a maintenance task. The key that unlocks these lockouts is at the end of a 2-ft. cable—wind it through the lock mount and secure by adding a padlock for each person working. The key is released only when all padlocks are removed.
Less disruptive than locking access to an entire panel, these lockouts isolate a single circuit. Because they're small and don't hold the padlocks, you'll still have room in your breaker box to flip adjacent switches on and off or close the panel door. These lockouts help your organization comply with OSHA 29 CFR 1910.147, which requires electrical circuits to be locked out during maintenance to prevent injuries.
Clamp-on lockouts can be installed on switches with or without through holes, since they clamp onto the surface of the switch.
Pin-in lockouts have two pins that snap into a switch’s through holes. Press a button on the end to open the pins and slide them over a switch.
For Max. Switch | Overall | Lock Mount | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Circuit Breaker Lockout Type | For Voltage | Wd. | Thick. | Lg. | Wd. | Dp. | For Circuit Breaker Type | For Manufacturer | For Max. No. of Padlocks | For Max. Padlock Shackle Dia. | Lg. | Wd. | Dp. | Temp. Range, °F | Each | |
Plastic | ||||||||||||||||
| Clamp On | 120V AC, 277V AC | 1/2" | 7/16" | 2 3/8" | 3/4" | 1" | Single Pole | American Switch, Bryant, Challenger, Crouse-Hinds, Federal Pacific Electric, Frank Adams, GE, ITE, Square D, Sylvania, Thomas & Betts, Westinghouse, Zinsoo | 7 | 5/16" | 4" | 13/16" | 11/16" | 0° to 250° | 00000000 | 000000 |
| Pin In | 120V AC, 277V AC | 1/2" | 5/16" | 1 7/8" | 3/4" | 1" | Single Pole | American Switch, Cutler-Hammer, ITE, Square D | 7 | 5/16" | 4" | 13/16" | 11/16" | 0° to 250° | 00000000 | 00000 |
Overall | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| For Max. No. of Padlocks | For Max. Padlock Shackle Dia. | Lg. | Wd. | Dp. | Mount Type | Temp. Range, °F | Specifications Met | Pkg. Qty. | Pkg. | |
Small Pack | ||||||||||
Plastic | ||||||||||
| 7 | 5/16" | 4" | 13/16" | 11/16" | Adhesive Back | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 1 | 00000000 | 000000 |
| 15 | 5/16" | 8" | 13/16" | 11/16" | Adhesive Back | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 1 | 00000000 | 00000 |
Large Pack | ||||||||||
Plastic | ||||||||||
| 7 | 5/16" | 4" | 13/16" | 11/16" | Adhesive Back | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 6 | 00000000 | 00000 |
| 15 | 5/16" | 8" | 13/16" | 11/16" | Adhesive Back | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 6 | 00000000 | 00000 |
Circuit Breaker Lockout Bars
Snap these bars into place to block circuit breaker switches from being flipped—even large, high-voltage switches. They attach to mounts on either side of your switch to physically block its movement. Secure them with a padlock. Use these lockouts to either keep equipment from starting up when it’s getting repaired or prevent critical equipment from powering down. After you’ve locked out a switch, you can still use the rest of your breaker box. These lockouts help you comply with OSHA 29 CFR 1910.147 requirements for the control of electrical circuits to prevent injuries.
For a complete lockout, you’ll need a bar and two lock mounts. You can either buy them individually or in a kit. Choose a red bar to lock out the off position; choose a green bar for the on position.
Mount lockout bar holders near your breaker box to store your lockout bars.
Lockout bar kits come with an alcohol prep pad. To ensure the mounts and lockout bars adhere to your circuit breaker housing, clean them off with the pad first. These kits cannot be sold outside the United States due to import restrictions.
Overall | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| For Max. Switch Wd. | Lg. | Wd. | Dp. | For Circuit Breaker Type | For Circuit Breaker Switch Type | Temp. Range, °F | Specifications Met | Each | |
Red Plastic | |||||||||
| 5 7/8" | 7 5/8" | 5/16" | 1/4" | Single Pole, Double Pole, Triple Pole, Multipole, Tie-Bar Multipole | No Hole, Through Hole | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 0000000 | 00000 |
Green Plastic | |||||||||
| 5 7/8" | 7 5/8" | 5/16" | 1/4" | Single Pole, Double Pole, Triple Pole, Multipole, Tie-Bar Multipole | No Hole, Through Hole | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 0000000 | 0000 |
Lock Mount | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Overall Lg. | For Circuit Breaker Type | For Circuit Breaker Switch Type | For Max. No. of Padlocks | For Max. Padlock Shackle Dia. | Lg. | Wd. | Dp. | Mount Type | Temp. Range, °F | Specifications Met | Pkg. Qty. | Pkg. | |
Yellow Plastic | |||||||||||||
| 4" | Single Pole, Double Pole, Triple Pole, Multipole, Tie-Bar Multipole | No Hole, Through Hole | 7 | 5/16" | 4" | 13/16" | 11/16" | Adhesive Back | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 2 | 0000000 | 000000 |
Overall | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Lg. | Wd. | Dp. | For Circuit Breaker Type | For Circuit Breaker Switch Type | Mount Type | Temp. Range, °F | Specifications Met | Each | |
Yellow Plastic | |||||||||
| 4" | 13/16" | 3/4" | Single Pole, Double Pole, Triple Pole, Multipole, Tie-Bar Multipole | No Hole, Through Hole | Adhesive Back | 0° to 250° | OSHA Compliant 29 CFR 1910.147 | 0000000 | 00000 |
Lock Mount | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| For Max. Switch Wd. | Overall Lg. | For Circuit Breaker Type | For Circuit Breaker Switch Type | For Max. No. of Padlocks | For Max. Padlock Shackle Dia. | Lg. | Wd. | Dp. | Type | Temp. Range, °F | Includes | Specifications Met | Cannot Be Sold To | Each | |
Plastic | |||||||||||||||
| 5 7/8" | 7 5/8" | Single Pole, Double Pole, Triple Pole, Multipole, Tie-Bar Multipole | No Hole, Through Hole | 7 | 5/16" | 4" | 13/16" | 11/16" | Adhesive Back | 0° to 250° | One Red Lockout Bar, One Green Lockout Bar, Two Lock Mounts, Alcohol Prep Pad | OSHA Compliant 29 CFR 1910.147 | Outside United States | 0000000 | 000000 |