When choosing electrical cables for industrial or commercial projects, the right decision can impact safety, performance, and cost. Many contractors and project managers often ask the same question:
"Is ACWU90 cable always aluminum?"
This confusion is understandable. Aluminum cables are very common in the market due to their cost-effectiveness and lightweight design. However, assuming all ACWU90 cables are aluminum could lead to mistakes in design, installation, and budgeting.
In this article, we'll break down the facts step by step, helping you fully understand ACWU90 cables, make an informed choice, and connect with a reliable supplier.
What is ACWU90 Cable?
Before answering the main question, let's first understand what ACWU90 cable actually is.
ACWU90 stands for:
- AC – Armored Cable: designed with a tough interlocked aluminum armor for superior mechanical protection.
- W – Wet Location: suitable for wet or damp environments.
- U – Underground: safe for direct burial applications.
- 90 – Temperature rating of 90°C.
Key Features of ACWU90 Cables
- Ideal for industrial plants, commercial buildings, high-rise apartments, and underground installations.
- Prevents physical damage thanks to its armored structure.
- Meets CSA C22.2 No. 51 standards, making it a trusted choice in Canada and other regions.
- Designed for harsh environments, including wet and corrosive locations.
By understanding these basics, you'll see why ACWU90 is such a versatile and widely used cable type in modern electrical systems.
Is ACWU90 Cable Always Aluminum?
The answer is simple: NO, ACWU90 is not always aluminum.
While aluminum conductors are very common in ACWU90 cables because they are cost-effective and lightweight, ACWU90 is also available in copper versions.
- Aluminum ACWU90 is popular for large-scale residential and commercial projects, especially where cost savings and easier handling are priorities.
- Copper ACWU90 is used when maximum conductivity, durability, and high performance are required, such as in factories or heavy industrial settings.
Pro Tip:
The assumption that all ACWU90 cables are aluminum comes from the fact that most bulk suppliers stock aluminum versions. Always check the conductor material before purchasing to ensure it meets your project's specifications.
Aluminum vs. Copper ACWU90: Which is Right for You?
Choosing between aluminum and copper ACWU90 is one of the most important decisions you'll make in your project. Here's a clear comparison:
| Feature | Aluminum ACWU90 | Copper ACWU90 |
|---|---|---|
| Cost | Lower upfront cost, ideal for budget-sensitive projects. | Higher cost, but better long-term value. |
| Weight | Lightweight, easier to transport and install. | Heavier, requires more manpower during installation. |
| Conductivity | Conductivity is about 61% of copper. | Superior conductivity, minimizing power loss. |
| Corrosion Resistance | Requires proper termination to prevent oxidation. | Naturally more resistant to corrosion. |
| Applications | High-rise building mains, underground feeds, residential service. | Industrial plants, heavy-duty machinery, critical infrastructure. |
- Choose aluminum if budget and weight are your top priorities.
- Choose copper if performance, longevity, and reliability are non-negotiable.
This simple evaluation can prevent costly mistakes and ensure your project runs smoothly.

How to Select the Right ACWU90 Cable
Making the correct decision goes beyond just knowing the materials. Here's a step-by-step guide to choosing the best ACWU90 cable for your project:
Step 1: Identify Your Project Needs
- What is the current load requirement?
- Is the environment wet, corrosive, or underground?
- What are the local regulations and building codes?
Step 2: Consider Your Budget
- Aluminum may cut costs upfront, but copper often delivers lower lifetime costs through better performance and reduced maintenance.
Step 3: Consult a Certified Supplier
- Work with a supplier who understands CSA standards and can recommend the right product specifications.
- This ensures safety compliance and prevents costly rewiring in the future.
Expert Support:
Dongguan Greater Wire & Cable Co., Ltd. offers full-series ACWU90 cables, both aluminum and copper, all CSA-certified and manufactured to the highest quality standards.
Contact us today for free consultation and quotes!
- Tel/WhatsApp/WeChat: +86 135 1078 4550 / +86 136 6257 9592
- Email: manager01@greaterwire.com






















