If your home was built between the mid-1960s and early 1970s, there’s a chance it contains aluminum branch wiring.

At the time, aluminum was used as a lower-cost alternative to copper. But over the years, it became clear that aluminum wiring can present safety concerns if not properly installed and maintained.

Many homeowners don’t even realize they have it.

⚡ Why Was Aluminum Used?

During the 1960s copper shortage, aluminum became a popular substitute for residential wiring.

It was:

• Less expensive
• Lightweight
• Widely available

However, the long-term performance in small branch circuits (15- and 20-amp circuits) proved problematic.

🔥 What Makes Aluminum Wiring Risky?

Aluminum expands and contracts more than copper when heated.

Over time, this can cause:

• Loose connections
• Overheating at terminals
• Oxidation buildup
• Increased resistance
• Potential arcing

Loose electrical connections are one of the leading causes of electrical fires.

🚩 Warning Signs of Aluminum Wiring Issues

• Warm outlets or switches
• Flickering lights
• Burning smell near outlets
• Discolored outlet plates
• Breakers tripping without clear cause

Even if no symptoms are visible, aluminum wiring should be evaluated if your home falls within that construction period.

🏠 Is Aluminum Wiring Illegal?

No — but modern installation standards have changed.

Current electrical safety standards published by the National Fire Protection Association under the National Electrical Code require specific connectors and installation methods when aluminum wiring is used.

Older homes may not meet today’s improved safety requirements.

🔌 Can It Be Fixed Without Rewiring the Whole House?

Yes — in many cases.

Options may include:

• Installing approved aluminum-to-copper connectors
• Using special CO/ALR rated devices
• Adding pigtail connections
• Replacing high-risk connections

A full rewire is sometimes recommended, but not always required. The right solution depends on the condition of the wiring.

💰 Why Insurance Companies Care

Some insurance providers:

• Charge higher premiums
• Require inspection reports
• Request remediation
• Or deny coverage until corrections are made

Aluminum wiring increases underwriting risk if not properly addressed.

🛠 When Should You Have It Evaluated?

You should schedule an evaluation if:

• Your home was built between 1965–1975
• You’re buying or selling a home
• You’re planning renovations
• You’ve noticed electrical irregularities
• Your insurance company requested documentation

A professional inspection can determine the safest path forward.

⚠️ Final Thought

Aluminum wiring doesn’t automatically mean your home is unsafe.

But it does mean your system should be properly evaluated and maintained.

Electrical safety isn’t about guessing — it’s about knowing.