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Extension Boxes

Our Extension Boxes are designed for F144 Fuse Units and DPI Units. The Extension Boxes are made from flame-retardant, self-extinguishing ABS material. They can accommodate larger cable sizes and additional terminal blocks for safe and efficient electrical connections.

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Product Overview

  • B1 + ABS: A compact extension box measuring 49mm in height, 90mm in width, and 67mm in depth.
  • B21 / 5B / E3 + IP7: This larger option measures 123mm in height, 88mm in width, and 58mm in depth, providing additional space for up to five terminal blocks for conductors up to 25mm².
  • B31 + IP8 / 3F: Measuring 123mm in height, 88mm in width, and 95mm in depth, this extension box offers increased capacity for more complex wiring needs.

Features and Benefits

Enhanced Capacity:

Accommodates up to five terminal blocks for conductors up to 25mm², allowing for more extensive wiring configurations.

Flexible Cable Entry:

ABS plates fitted with graduated cone grommets are standard, facilitating various cable entry sizes and types.

Customisation Options:

Brass ferrules with cable clamps or cable glands can be supplied or fitted to any extension box, and external brass plates are also available, ensuring adaptability to specific installation requirements.

Technical Specifications

Case Studies

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Our Extension Boxes are designed for F144 Fuse Units and DPI Units. The Extension Boxes are made from flame-retardant, self-extinguishing ABS material. They can accommodate larger cable sizes and additional terminal blocks for safe and efficient electrical connections.

Contact Us

With decades of expertise, award-winning service, and a commitment to quality, Tofco is your trusted partner for innovative power distribution solutions.

Have questions or need a tailored solution? Our team is here to assist you with any inquiries about our products or services. We aim to respond to all queries within 24-48 hours.


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