When it comes to electrical wiring, selecting the correct cable size isn't just about performance - it's about safety, reliability, and cost-efficiency. AC90 cable, a type of armored cable widely used in commercial, industrial, and residential projects, is known for its durability and ease of installation.
But here's the key question every contractor, electrician, or project manager asks:
"What size is AC90 cable, and which one should I choose for my project?"
This article will walk you through everything you need to know about AC90 cable, including its definition, common sizes, a handy size chart, and tips to avoid costly mistakes. Whether you're working on a small residential upgrade or a large industrial facility, this guide will help you make the right decision.
What is AC90 Cable?
AC90 cable is a type of aluminum armored electrical cable designed for safe, flexible wiring without requiring additional conduit.
Structure and Features
- Aluminum Interlocked Armor: Provides mechanical protection while remaining flexible.
- Insulated Conductors: Typically thermoplastic, rated for 90°C.
- Integrated Ground Wire: Enhances safety and simplifies installation.
Where AC90 Cable is Commonly Used
- Commercial buildings – lighting circuits, small appliances, and office power systems.
- Industrial facilities – feeders, motors, and heavy machinery.
- Residential projects – basement wiring, garages, and renovations.
AC90 is ideal for indoor dry locations, but it can also be used outdoors when properly protected according to code.
AC90 Cable Sizes Explained
Choosing the right AC90 cable size is critical for preventing overheating, power loss, and potential fire hazards.
How Cabe Sizes Are Measured
AC90 cable sizing is based on AWG (American Wire Gauge) or kcmil measurements, which indicate the conductor's cross-sectional area.
- Smaller AWG numbers = larger conductors
- Larger conductors can carry more current and are suitable for heavy loads.
Key Factors Affecting Cable Size Selection
- Electrical load (ampacity) – Total current your system will carry.
- Voltage drop – Especially important for long cable runs.
- Installation environment – Temperature, moisture, and safety code compliance.
- Local codes and regulations – NEC (USA) or CEC (Canada).
AC90 Cable Size Chart
Use this chart as a quick reference when selecting AC90 cable sizes:
| AC90 Cable Size (AWG) | Conductor Area (mm²) | Typical Ampacity (A) | Typical Applications |
|---|---|---|---|
| 14 AWG | 2.08 mm² | 15A | Residential lighting circuits |
| 12 AWG | 3.31 mm² | 20A | Small appliances, outlets |
| 10 AWG | 5.26 mm² | 30A | HVAC systems, water heaters |
| 8 AWG | 8.37 mm² | 40A | Electric ranges, sub-panels |
| 6 AWG | 13.3 mm² | 55A | Industrial equipment, large sub-panels |
| 4 AWG | 21.2 mm² | 70A+ | Large industrial feeders |
Always verify with local electrical codes to ensure compliance.
How to Choose the Right AC90 Cable Size
Step 1: Calculate Your Electrical Load
- Determine the total amperage of the devices connected to the circuit.
- Add a 25% safety margin for continuous loads.
Step 2: Check Installation Conditions
- High ambient temperatures may reduce ampacity.
- For long runs, choose a larger size to minimize voltage drop.
Step 3: Follow NEC or CEC Standards
- These codes provide minimum size requirements for specific applications.
- Hiring a certified electrician ensures safe and compliant installations.
Common Mistakes When Choosing AC90 Cable Size
Avoid these pitfalls to save money and prevent hazards:
- Undersized cable – Leads to overheating and potential fire risks.
- Ignoring voltage drop – Especially problematic for long runs in industrial facilities.
- Overlooking environmental factors – Moisture, chemicals, or outdoor exposure can degrade cable life.
- Not following local codes – Can result in failed inspections and costly rework.
Why Choose Us for Your AC90 Cable Needs
At Dongguan Greater Wire & Cable Co., Ltd., we specialize in manufacturing high-quality AC90 cables for a wide range of applications. Here's why customers worldwide trust us:
- Complete product range: From small residential projects to large industrial installations, we have every AC90 cable size you need.
- Professional technical support: Our experienced pre-sales and after-sales teams provide expert guidance to help you select the perfect cable for your project.
- Strict quality control: Every cable meets international safety standards for performance and reliability.
- Flexible order options: Whether you need bulk supply or small quantities, we deliver on time and on budget.
Contact us today to get a free consultation and quotation!
- Company: Dongguan Greater Wire & Cable Co., Ltd.
- Tel / WhatsApp / WeChat: +86 135 1078 4550 / +86 136 6257 9592
- Email: manager01@greaterwire.com
Your project deserves the best quality and support. Let us help you power your success with premium AC90 cable solutions.