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3M™ Aluminium  Conductor Composite Reinforced received the R&D 100 Award for recognition as a technological breakthrough.

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3M™ Aluminium Conductor Composite Reinforced (ACCR)

Transmission Operators need more flexibility and transit capacity to take acount of the increase of renewable energies in the energy mix and the need for increased reliability.

Reliability matters. Power lines must have the capacity and connectivity to transmit electricity on demand as requirements for increased ampacity and contingency lines grow. Enter 3M™ Aluminium Conductor Composite Reinforced (ACCR) all-Aluminium composite overhead conductor with an all-Aluminium composite core.

A lighter weight, high temp low sag conductor (HTLS) with twice the ampacity (or more), 3M ACCR doesn’t place extra weight or force on towers while meeting mechanical and clearance requirements. It carries more power in the same size cable and can run at higher temperatures without additional power line sag.

Designed as an alternative to replace ACSR, ACSS and AAC on existing structures, 3M Aluminium Conductor Composite Reinforced is designed to be a less labour-intensive and a less expensive option for installers to reconductor power lines.

  • 3M™ Aluminum Conductor Composite Reinforced

    3M ACCR's low weight and thermal expansion results in less sag at high ampacities

    • The unique combination of an Aluminium matrix core and heat resistant Al-Zr outer strands provides many advantages over other conductors. Compared to a conventional steel core, the composite core has:

      • Lower thermal expansion for less sag
      • Equivalent strength and durability
      • Less weight
      • Consistent performance at high temperatures over long periods of time

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3M ACCR Construction Services

Help save time, money and extra labour with project planning and installation support from 3M.

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    Send us your project plan and profile drawings.

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    We review your project plan and provide a recommended cable length plan, along with installation procedures.

  • Delivery truck icon

    After receiving your order, we consolidate the shipment of conductors and related accessories.

  • Training icon with people

    We provide complimentary onsite training to your selected installation contractors to help ensure a successful installation.


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We can perform complimentary hands-on demonstrations and cable installation training, bring utilities and their selected contractors together to help coordinate the project, and provide follow-up training.

3M offers a fast and potentially cost-saving way to increase capacity and achieve greater clearances using cables that can perform for many years.

CONSULT WITH AN ACCR EXPERT

ACCR Frequently Asked Questions

  • 3M™ Aluminium Conductor Composite Reinforced (ACCR) is a proven, high temperature low sag (HTLS) overhead transmission conductor. Designed as a replacement for similar sized ACSR and ACSS, it provides up to twice the ampacity with less thermal expansion (sag) while maintaining or improving mechanical loads, tensions and clearances on existing structures.

  • Depending on the application, 3M ACCR can carry two or more times the current of a standard conductor of comparable diameter. It has less weight and sag, but the same strength and can be installed to meet your tension and clearance requirements.

    This allows you to maximise the capacity of your transmission upgrade using existing structures and rights of way. Compared to a rebuild project, you can get your upgrade done faster and with fewer planning permission requirements.

  • By eliminating the need for expensive new towers, foundations and construction; land acquisition; lengthy and controversial planning permission processes and long construction outages, upgrading with 3M ACCR can offer substantial savings even at a higher conductor cost-per-mile.

    3M ACCR can also provide more capacity for the same size conductor as even other high temperature low sag conductors, maximising the value and longevity of your upgrade.

  • 3M ACCR is installed on 5 continents and in a variety of applications, including areas with significant ice loading or corrosive conditions; densely populated, fast growing urban areas; environmentally sensitive installations; and critical lines.

  • 3M ACCR is specifically designed to be installed much the same as ACSR. Equipment differences are minimal. Larger diameter running blocks and puller-tensioners are required. Roller arrays should be used for break over towers and certain angles. Also a tensioning grip, rather than a Chicago or pocketbook grip, should be used. Check the Installation Guide (PDF, 3.2MB) for more details.

    Because the outer wires are hardened Aluminium, they are more resistant to damage and bird caging during installation than ACSS and ACCC, which use annealed Aluminium. In addition, we offer installation training and support during your project.

  • Dervaux:

    • Single tongue, double tongue and Clevis-type dead ends
    • Mid span joints
    • Jumper terminals
    • Repair joints
    • Helica | fittings
    • Spacers
    • Stockbridge dampers
    • High temperature compounds
    • Suspension clamps

    More info about Dervaux Accessories


Key Resources for ACCR


3M ACCR Field & Lab Test Reports

Both 3M ACCR and its accessories have been rigorously tested and verified to ASTM, IEEE, ANSI or IEC specifications – both in the laboratory and in the field. Field test sites include the Oak Ridge National Laboratory and various utility locations subject to heat and cold, heavy icing, heavy loading, and corrosive atmospheres.


3M Power Utilities Services

If you're unsure what you need, our team can visit your site to help you find the right solution. We also have a wide range of resources available including videos, brochures and product data sheets to help you increase your knowledge.

  • Need assistance with your project? 3M will work with you to determine the products you need.

  • Stay up to date with the latest news and events for the Power Utilities Industry. We would like to share new product information, technical guidance and upcoming trends with you.

  • Watch helpful videos demonstrating a variety of 3M electrical products.


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