ACSS/AW (Aluminum Conductor Steel Supported)

Aluminum Conductor Steel Supported (ACSS/AW) wire provides corrosion resistance and improved ampacity. Learn how this wire from Peak Substation Services is ideal for your overhead transmission and distribution lines.

ACSS/AW Applications

ACSS/AW is mainly used in overhead transmission and distribution lines. Its meticulous design allows it to work continuously in environments of up to 250°C—all while retaining its strength.

ACSS/AW wire is robust, providing reduced conductor sag even with emergency electrical loadings. Pre-stretching the conductor during installation activates its self-damping capabilities. Additionally, the long-term aluminum creep doesn't affect its final sags.

Aluminum Conductor Steel Supported wire is ideal for reconductoring applications that require more current with existing clearances and tensions. It also serves new line operations that allow for structure economization because of lower conductor sag. Additionally, you can use this conductor for lines that experience aeolian vibration and in new line applications for high emergency loadings.

ACSS/AW Specifications

ACSS/AW conductors from Peak Substation Services meet or exceed the following ASTM specifications:

It’s also worth noting ACSS/AW strandings match B232 ASTM specification.


The ACSS/AW conductor consists of concentric-lay-stranded components. Its central core is made of steel strands, surrounded by one or more layers of aluminum 1350-0 wire. In addition, it features the "0" (soft or fully annealed) temper aluminum, which means the steel core primarily bears the conductor's mechanical load. The steel core wire is coated with aluminum to prevent corrosion.

ACSS/AW offers strength characteristics similar to ACSS; however, it features aluminum-clad steel core wire. As such, it delivers slightly higher ampacity and corrosion resistance. 

ACSS/AW Conductor Types

The ACSS/ AW spec sheet consists of these conductor variations:

Squab, Parakeet, Bittern, Rook, Canary, Starling, Gannet, Scoter, Junco, Lark, Brant, Eagle, Linnet, Drake, Mallard, Tern, Hen, Parrot, Lapwing, Falcon, Condor, Rail, Chukar, Mockingbird, Macaw, Roadrunner, Towhee, Cuckoo, Cardinal, Peacock, Bluebird, Ostrich, Kiwi, Ibis, Curlew, Dove, Bluejay, Finch, Flicker, Grackle, Redwing, Thrasher, Hawk, Joree Snowbird, Stilt, Canvasback, Grosbeak, Oriole, Flamingo, Nuthatch, Ruddy, Dipper, Egret, Martin, Teal, Bobolink, Pheasant, Wood Duck, Bunting, Plover.

It can be difficult to get the right cable for your project with all these different variations. However, you might have an easier time with the following checklist for reference:

Use the Substation Packaging Experts

Peak Substation Services is the right partner for pre-engineering and packaging structural and electrical elements. You can count on us for quality ACSS/AW cables as well as other materials and items for transmission and utility distribution substations. Our expertise covers a wide voltage range, from 4,160 to 500,000 extra-high voltage (EHV). In addition, we have experience working with aluminum and steel materials in lattice structures. We boast a well-established record of partnership with contractors, investor-owned utilities, municipal utilities, consultants, and rural electrical associations. Whatever substation component you need—whether new or replacement—we've got you covered.

Apart from high-quality structural components, customers can also count on us for:

  • Metering
  • Current carrying
  • Switching
  • Grounding
  • Connecting
  • Fusing
  • Lighting arresting
  • Overload protection

Additionally, we specialize in substation design, adhering to different standards, including the American Society of Civil Engineers (ASCE), the Rural Utilities Service (RUS), and the Institute of Electrical and Electronics Engineers (IEEE). Besides supporting the design stage, we want to see your vision come to life, supplying all the components you need for a successful project. You don't just benefit from technical expertise: Our team offers a collaborative partnership to ensure the final project aligns with your needs and specifications.

Another area of expertise is utility poles. Whether you need a long-term solution or are looking for temporary support for your transmission lines until steel poles arrive, we have something for every need. Our poles come in high-quality materials for maximum safety and reliability, especially during extreme conditions. Superior wood poles also last longer, which cuts down on maintenance costs. The best part is we ship across the U.S., delivering your wooden poles wherever and whenever you need them.


Peak Substation Services is your one-stop materials packager for structural and electrical components. It's not just about getting quality ACSS/AW wire: We also guarantee reliable service and peace of mind in every transaction.

Since our start in 2006, we've consistently and successfully catered to clients across the U.S. Additionally, we've completed over 1,000 packages, helping hundreds of satisfied customers throughout the years.

Our experts' combined experience spans more than a century, with team members specializing in substation procurement, manufacturing, design, construction, distribution, and packaging. As such, you can be confident you're partnering with an experienced resource.

You can count on Peak Substation Services for all-inclusive takeoffs for all substation materials. We offer budget details, shopping guides, and free shipping to customers in the U.S. We have a team in our Product Sales division that primarily handles high-voltage components as necessary.

At Peak, we can help you save time on project coordination and completion. Thanks to our network of vendor relationships, we can maximize your purchasing experience and reduce combined material costs.

Additionally, we operate on the following PEAK guiding principles:

  • Professionalism: Peak Substation Services upholds the highest standards of integrity and courtesy in all of our client interactions. Our entire team works with customers based on a strong foundation of trust and respect, and we diligently stick to industry best practices and ethical guidelines.
  • Experience: Our employees have combined experience that covers more than a century. We’re exceptionally well-prepared for a wide range of challenges and tasks. Thanks to this extensive expertise, we can efficiently provide comprehensive solutions and successfully navigate complex projects.
  • Accountability: We hold ourselves responsible for meeting and surpassing client expectations and take full ownership of our commitments. This promise has earned us the trust of countless clients.
  • Knowledge: We're consistently at the forefront of industry advancements, with our team continuously expanding their knowledge of substation technology, regulations, and best practices. Therefore, you can rely on us for cutting-edge, innovative solutions.

Bill-Of-Material & Purchase Orders

Substation or overhead power line installation requires various materials and components. Most items must arrive at the workstation following a pre-established schedule, but others use a just-in-time basis. Peak Substation Services stands in for professional consultants with our bill of materials and purchase orders.

Our comprehensive bill of materials specifies the components and materials required for your substation projects. It also ensures efficient procurement and assembly, allowing you to streamline ordering, minimize errors, and enhance project management.

Our purchase orders clearly outline the terms, quantities, and material delivery schedules. This ensures timely and accurate delivery while providing a structured and accountable procurement process. By reducing direct engagement with consulting agencies, you'll cut costs and save time in the long run.

Finally, our Product and Component Sales Division will ensure you get high-voltage materials and components as needed. Our staff members exceed typical substation packaging services to assist with your project from start to finish. You can be confident in the following categories:

  • Procurement
  • Design
  • Materials receipt
  • Purchasing coordination
  • Delivery logistics

Contact Us Today for Your ACSS/AW Wire Needs

Why struggle to shop for ACSS/AW wire and other electrical substation appliances? Peak Substation Services will address your needs with our unmatched, one-stop experience. Everyone in our organization strives to make your life easier, working as part of your team to ensure the success of your substation project.

Your search is over. Choose us as your packager and receive all specified components on time and within budget. Contact us if you have questions about ACSS/AW wire or for other substation needs.

HAve Questions? Contact US TOday!