Clamp-On Breaker Lockout
FREE DELIVERY
Secure Switches in Seconds
- All-in-One Safety Solution: The Clamp-On Breaker Lockout offers reliable circuit breaker security across offices, workshops and industrial sites, ensuring effortless lockout/tagout.
- Versatile Compatibility: Fits virtually any built-in tripping plastic-case circuit breaker models, providing a single lockout solution that works across diverse breaker brands and sizes.
- Rock-Solid Grip: The thumbscrew mechanism clamps securely onto the switch tongue, delivering unwavering hold under vibration or force, so your lockout remains intact.
- Lockdown Cover: The pull-on cover plate engages effortlessly over the clamp, creating a tamper-resistant seal that stops unauthorised tampering or loosening.
- Customisable Security: Designed to accept padlocks with shackles up to 7 mm diameter, this lockout device lets you choose your preferred lock type, enhancing safety.
- Enhanced Locking Splint: The extended sliding cleat securely engages the breaker handle, preventing accidental trips and offering an extra layer of mechanical reinforcement.
- Built to Last: Constructed from rugged polypropylene, the lockout withstands abrasion, impacts and temperature fluctuations, promising reliable, long-term performance.
- No-Tool Setup: Quickly secure the lockout device without the need for additional tools – just clamp onto the breaker, snap on the cover and lock to streamline safety procedures.
- Overall Dimensions: 55(H) × 30(W) × 40(D) mm – compact, lightweight design at just 0.1 kg ensures easy handling, storage and compatibility with diverse breaker installations.

Elevate Workplace Safety Effortlessly
Step into a new standard of lockout efficiency with the Clamp-On Breaker Lockout. Whether you’re working in an office, workshop or heavy-duty site, this device delivers dependable protection against accidental power activation. Its intuitive design ensures rapid deployment without extensive training or tools.
Designed to simplify lockout/tagout procedures, it keeps maintenance teams safe and operations running smoothly. You’ll spend less time fumbling with safety gear and more time on critical tasks. With durable construction and a compact profile, it integrates seamlessly into any toolkit.
Universal Compatibility
This lockout equipment accommodates a broad spectrum of built-in, plastic-case breakers without the need for multiple adapters. By fitting breakers of various brands and models, it streamlines inventory and reduces the risk of incorrect sizing. Maintenance crews can reach for a single solution, confident it will work every time.
One versatile device now covers incompatible panels and mismatched parts, eliminating delays and frustration. Teams benefit from a consistent approach that works across residential, commercial, and industrial installations. You’ll cut procurement complexity and simplify safety audits with standardised lockout practices.


Secure Clamping
A precision-engineered thumbscrew applies firm pressure directly to the switch tongue, preventing any slip or movement under vibration. This reliable grip keeps the breaker firmly immobilised, even in high-traffic or demanding environments. Service personnel can trust that once clamped, the breaker remains off until deliberately released.
By focusing force where it’s needed most, the device avoids over-torquing and potential damage to delicate breaker handles. The engineered clamp design minimises wear on both tool and breaker, extending service life. It’s an essential safeguard for any maintenance team seeking both reliability and care for equipment.
Item Information
- Fits built-in plastic-case circuit breakers from major manufacturers.
- Thumbscrew clamp applies precision torque to switch tongue.
- Sliding splint secures handle position against accidental activation.
- Accepts padlocks with up to 7 mm shackle diameter.
- No tools required for installation; clamp, cover, lock.
- Handle width options: up to 16 mm, 38 mm and 68 mm.
- Dimensions: 55 (H) × 30 (W) × 40 (D) mm.
- Weight: just 0.1 kg per unit.
- Made from impact-resistant, UV-stable polypropylene.
- Resistant to abrasion, chemicals and temperature fluctuations.
- Tamper-proof cover prevents unauthorised clamp loosening.
- Suitable for offices, workshops and heavy-duty industrial environments.

Tamper-Proof Cover
An easy-to-attach cover plate slips over the clamp, sealing off access points and thwarting unauthorised adjustments. This additional layer of security reinforces the initial clamp and gives managers confidence that safety protocols are truly locked in. During extended maintenance or multi-shift operations, there’s no worry of accidental loosening or interference.
The robust cover snaps firmly into place without tools, creating a tamper-resistant barrier around the switch tongue. It resists prying or accidental bumps, ensuring that safety remains uncompromised. With this simple yet effective design, you maintain uninterrupted protection for your workforce.


Padlock Ready
By accepting standard padlocks with up to a 7 mm shackle diameter, this lockout equipment lets you choose the level of security that suits your site’s requirements. You can easily swap between different padlocks without altering or replacing the device, simplifying inventory and ensuring compatibility.
Whether you prefer keyed or combination locks, the design accommodates your safety protocols without compromise. Maintenance teams gain the flexibility to match corporate security standards and prevent unauthorised access during critical work.
Locking Splint
A long sliding cleat engages directly with the breaker handle, creating an extra layer of mechanical resistance that stops accidental or unauthorised trips. By securing the handle in position, it ensures power remains off until the lockout is intentionally removed.
This added strength is especially valuable in high-vibration or high-traffic areas where simple clamps might loosen over time. Technicians can trust that once set, the breaker will stay immobilised, reducing the risk of unexpected energisation.


Durable Construction
Its rugged polypropylene body withstands abrasion, impacts and extreme temperature shifts without cracking or deforming. This resilience ensures reliable performance across diverse environments, from busy workshops to harsh industrial sites.
With high chemical resistance and UV stability, the device won’t degrade under prolonged exposure to oils, solvents or sunlight. You’ll benefit from extended service life and lower replacement costs, keeping your safety budget on track.
Tool-Free Installation
No additional tools are required to secure the device—simply clamp onto the switch tongue, snap on the cover and apply your chosen padlock. This intuitive process cuts installation time to under 10 seconds, letting teams focus on core tasks rather than fiddly setup.
Quick adaptability means you can move between different breaker panels seamlessly, reducing downtime during maintenance schedules. The straightforward method also minimises training needs, making it ideal for mixed-skill workforces.

Full Specifications
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Free Next Day Delivery
Enjoy the luxury of free next-working-day delivery to mainland Great Britain when you order before 3 pm. Whether you’re topping up your workshop supplies or stocking up on a Clamp-On Breaker Lockout, you’ll have essential safety gear at your door by the very next day. This swift service removes downtime worries and lets you focus on your core operations without delay.
Our seamless dispatch process ensures every order is prioritised for rapid handling, with proactive tracking updates keeping you informed every step of the way. No hidden fees, no surprises—just fast, reliable delivery that matches your urgent needs.
Dedicated Support
Our friendly support team is just a phone call away on 0800 0126777, available Monday to Friday from 8 am to 5 pm. From product guidance to order queries, you’ll receive personalised attention from experts who understand your workplace challenges.
We pride ourselves on resolving issues swiftly, with every call handled by a real person committed to finding the right solution. That accessibility and reliability build lasting trust, ensuring you never feel stranded when you need assistance most.


Guaranteed Quality
All our products come with a comprehensive 1-year parts and labour warranty, reflecting our unwavering confidence in every piece of lockout equipment. You can purchase with peace of mind, knowing that any manufacturing fault will be rectified promptly and at no extra cost.
This commitment to quality underpins our brand promise, ensuring you invest in solutions that deliver long-term reliability. Trust in our standards and rest assured your safety protocols remain uncompromised throughout the warranty period.
Warranty
1 year parts / labour
Price Promise
We match any price
Easy Returns
Return or exchange
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