TIS TISUL3 Universal 3 Phase MCB Lock

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Sale price £4.38 ex VAT
Sale price (£5.26 inc VAT)
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The TIS TISUL3 Universal 3 Phase MCB Lock, a versatile and essential tool designed to enhance safety measures during maintenance or service procedures involving three-phase electrical systems. Crafted with precision and durability in mind, this universal MCB lock ensures secure isolation of three-phase circuits, preventing accidental re-energization and safeguarding personnel working on electrical equipment.

Key Features:

  1. Universal Compatibility: The TIS TISUL3 is engineered for compatibility with a wide range of three-phase miniature circuit breakers (MCBs). Its adaptable design ensures that it can be used across various brands and models, providing a universal solution for locking out three-phase circuits.

  2. Durable Construction: Constructed with high-quality materials, the TISUL3 MCB Lock is built to withstand the demanding conditions of industrial environments. Its robust design ensures durability, making it a reliable tool for repeated use in challenging settings.

  3. Secure Lockout Mechanism: The MCB lock features a secure lockout mechanism that prevents the accidental closing or activation of three-phase circuit breakers. Once applied, it ensures that the circuit remains safely isolated until the lock is intentionally removed, enhancing safety during maintenance tasks.

  4. Color-Coded Design: The TISUL3 boasts a color-coded design, enhancing visibility and making it easily distinguishable on electrical panels and equipment. This visual indication helps promote a clear understanding of the lockout status and contributes to a safer work environment.

  5. Quick and Easy Application: Designed for user-friendly operation, the TISUL3 MCB Lock allows for quick and easy application. Its intuitive design ensures that personnel can efficiently implement lockout procedures, minimizing downtime during maintenance or service activities.

  6. Tamper-Resistant Construction: The lock is engineered to be tamper-resistant, preventing unauthorized removal and ensuring that the three-phase circuit breaker remains securely locked out throughout the maintenance process.

  7. Versatile Applications: Whether used in industrial facilities, commercial buildings, or construction sites, the TIS TISUL3 Universal 3 Phase MCB Lock is a versatile solution for enhancing safety protocols during electrical maintenance, repair, or servicing.

  8. Compliance Assurance: Incorporating the TISUL3 into your lockout/tagout procedures helps your organization meet safety compliance standards. This universal MCB lock provides a reliable and efficient means of isolating three-phase electrical circuits, preventing accidental energization during critical maintenance tasks.

Upgrade your electrical safety procedures with the TIS TISUL3 Universal 3 Phase MCB Lock. With its universal compatibility, durable construction, and secure lockout mechanism, it stands as an essential tool for professionals seeking a reliable and effective solution for securing three-phase circuit breakers. Trust in TIS for cutting-edge tools that prioritize safety and efficiency.




Brand Test Instrument Solutions
Colour Red
Lockout Type
Grip Tight
Guarantee 1 Year
Datasheet unavailable for this product at the moment.

We recognise that time is of the essence when it comes to your projects, so we offer a next working day delivery service as standard on the majority of our products**

Order by 3pm for next working day delivery (Mon-Fri). 

All our deliveries are free over £100 excluding VAT. We use DHL and Royal Mail as our courier. Once an order is placed, DHL/RM will contact you (If an email and mobile phone number are supplied).

If an order is placed on the weekend, we will dispatch on Monday for delivery to you on Tuesday if in mainland UK. If an order is placed on a Friday it will be with you on Monday.

**Please check the individual product page on estimated delivery times.

Remote areas: Scottish Highlands, Northern Ireland, Channel Islands and UK Islands such as Isle of Man might be subject to an additional delivery charge depending on the size of the order. If this is the case we will contact you.

These locations will also have a 48 hour delivery service due to distance.

Couriers can deliver up to 8pm but you will have received a timed delivery notification prior to this.

Free delivery does not apply to some products that are required to be delivered by pallet to avoid damage. The cost of this is £100 excluding VAT per pallet. Please note that although every effort is made to try and guarantee a next day delivery for orders shipped by pallet. Sometimes it is a two to three day service.  

Free delivery also does not apply to some products over 1.19 metre in length. This is due to the additional costs of shipping products of this size. The cost of this is £25 ex VAT per bundle, with the number of lengths per bundle varying by product. Please note that although every effort is made to try and guarantee a next day delivery for orders for lengths, sometimes it is a two to three day service.    

Please note that orders with products over 1.19 metre or requiring a pallet are not sent on DHL. These orders are currently seeing delivery times of 2-3 days.

Order Confirmation

This will be automatically sent to you straight after placing your order, if you don't receive please check your junk inbox to see if it has gone in there. This confirmation also contains a downloadable VAT invoice on.

Delivery Updates

These will be provided via email from us upon despatch and then with tracking details - our couriers will provide timed deliveries so you can arrange to be in within the delivery window without having to wait in all day.

Delivery Carrier

Deliveries will be by Royal Mail, DHL or DPD.

Out of Stock Items

If an item you require is Out of Stock on our website, please feel free to contact our sales team and they will be able to provide an expected in stock date.

Deliveries on Requested Days

If you have a particular day you require delivery please write it on the order notes at checkout and our friendly team will arrange & confirm for you.

Aborted Deliveries

If you or the intended recipient are not available when the delivery is attempted a delivery card will be put through your letterbox, or the courier will send a text. Please follow the instructions to rearrange delivery.

Late Deliveries

While we strive to maintain the highest possible standards, there may be occasional circumstances beyond our control that can affect the delivery timeline. 

Planning Ahead

Please do not schedule or start any installation work until after you have received your order and checked all goods for any defects or missing parts. This will enable you to resolve any technical questions or to order specific additional fittings if needed. We cannot be held liable for third party delays.

We will make every effort to deliver goods on the date or within the dates quoted, however, such dates are a guideline only and Thomas Electrical Distributors shall not be held liable in any way due to delayed deliveries that are out of our control.

At Thomas Electrical Distributors we are extremely confident in the standard and quality of the products that we offer.

Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. 

To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging. 

To complete your return, we require a receipt or proof of purchase. 
Please do not send your purchase back to the manufacturer. 

There are certain situations where only partial refunds are granted, or we won't be able to provide a refund (if applicable) 
- Any item not in its original condition, is damaged or missing parts for reasons not due to our error 
- Any item that is returned more than 30 days after delivery 

wesupplyfixings 30 day moneyback guarantee

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