A Problem Hidden Inside the Walls of Thousands of NWA Homes
Between 1965 and 1973, aluminum was widely used as a substitute for copper in residential branch circuit wiring. Copper prices had spiked, and aluminum was cheaper and widely available. Builders and electricians across the country used it, and homes throughout Northwest Arkansas from that era were wired with it.
The problem did not become apparent right away. It showed up over years and decades as connections loosened, overheated, and in some cases caused fires. By the mid-1970s the Consumer Product Safety Commission had documented the risk, and the industry largely moved back to copper for branch circuit wiring.
Today, aluminum wiring in older homes is one of the most common concerns we encounter during service calls in Springdale, Fayetteville, Rogers, and Bentonville. Many homeowners do not even know they have it.
Why Aluminum Wiring Is Riskier Than Copper
Aluminum itself is not a bad conductor. The problem is how it behaves at connection points compared to copper.
Expansion and Contraction
Aluminum expands and contracts more than copper as it heats and cools with electrical load. Over years of use, this movement works the wire loose from outlets, switches, and breaker connections. Loose connections arc. Arcing generates intense heat. Heat causes fires.
Oxidation
Aluminum oxidizes when exposed to air, forming aluminum oxide on the surface of the wire. Aluminum oxide is a poor electrical conductor. As oxidation builds up at connection points, resistance increases. Increased resistance means more heat generated at the connection. That heat accelerates the problem.
Incompatibility with Standard Devices
Standard outlets, switches, and fixtures are designed and rated for copper wire. When aluminum wire is connected to devices rated only for copper, the connection point is a mismatch that accelerates wear and increases fire risk. Devices that are rated for aluminum are marked AL or CO-ALR and are the only ones that should be used with aluminum wiring.
How to Tell If Your Home Has Aluminum Wiring
There are a few ways to check without opening your walls.
- Check the panel: Look at the wires entering your circuit breakers. Aluminum wire is silver-colored rather than the orange-copper color of copper wire. If you see silver-colored wire at the breakers, you likely have aluminum branch circuit wiring.
- Check the wire markings: If you can see any exposed wire in the attic, crawl space, or basement, look at the plastic sheathing. Aluminum wire is often marked AL or ALUMINUM printed on the jacket.
- Check your home’s build date: If your home was built or substantially renovated between 1965 and 1973, there is a reasonable chance aluminum wiring was used for branch circuits. Homes built before 1965 or after 1973 are much less likely to have it.
If you are not sure, a licensed electrician can open outlets and inspect connections to confirm what type of wiring is present.
Warning Signs of Aluminum Wiring Problems
Aluminum wiring does not always announce itself with obvious symptoms. But when connection points begin to fail, you may notice:
- Outlets or switches that feel warm to the touch
- Flickering lights that are not related to the light fixture itself
- A burning smell near outlets or the panel without an obvious source
- Outlets that stop working intermittently
- Discoloration or scorch marks around outlet and switch cover plates
Any of these in a home with known or suspected aluminum wiring should be treated as an urgent call to a licensed electrician, not something to monitor and see if it gets worse.
What Are the Options for Fixing Aluminum Wiring?
There are three accepted approaches to addressing aluminum wiring risks in a home. The right one depends on your budget, your home’s specific wiring condition, and your long-term plans for the property.
Option 1: Pigtailing with Copper (COPALUM or AlumiConn)
Pigtailing involves connecting a short length of copper wire to the end of each aluminum wire at every connection point throughout the home. The copper pigtail then connects to the outlet, switch, or fixture. This eliminates the aluminum-to-device connection that causes problems.
The connection between the aluminum and copper pigtail must be made with either a COPALUM crimp connector installed with a special tool, or an AlumiConn connector, which does not require special tooling. Both are accepted by the Consumer Product Safety Commission. Standard wire nuts are not acceptable for aluminum-to-copper connections.
Pigtailing every connection point in a home is labor-intensive but is the most cost-effective permanent fix for most homeowners with aluminum wiring.
Option 2: Replace All Devices with CO-ALR Rated Devices
Outlets and switches rated CO-ALR are specifically designed for aluminum wiring connections. Replacing all devices throughout the home with CO-ALR rated versions eliminates the incompatibility risk at connection points without requiring pigtailing.
This approach is less thorough than pigtailing because it does not address connections at fixtures, junction boxes, or the panel itself. It is sometimes used as a partial mitigation measure alongside other steps.
Option 3: Full Rewire with Copper
A full rewire replaces all aluminum branch circuit wiring with copper. It is the most comprehensive solution and eliminates aluminum wiring concerns entirely. It is also the most expensive option and is typically recommended for homes where the wiring is in poor condition, the home is being substantially renovated, or the homeowner simply wants the issue permanently resolved.
Have aluminum wiring and not sure which option is right for your home? Call NWA C&S Electric and we will assess the condition of your wiring and give you a clear recommendation.
What About Insurance?
This is where the pressure often comes from. Many homeowners with aluminum wiring first hear about it from their insurance company, not from an electrician.
Insurance companies are increasingly scrutinizing homes with aluminum wiring during policy renewals in Arkansas. Some require documentation of remediation before renewing. Others add surcharges. Some will not write new policies on homes with unaddressed aluminum wiring at all.
If your insurer has flagged your aluminum wiring, getting the work done with proper documentation from a licensed electrician is the path forward. A letter from your electrician describing the remediation performed and the methods used is typically what insurers ask for.
Frequently Asked Questions
Is aluminum wiring illegal?
No. Aluminum wiring is not illegal and homes with it are not required to be rewired by code simply because of its age. The risk comes from how connections degrade over time and whether the right devices and connectors are in place. A properly maintained aluminum wiring system with appropriate devices and connections is not a code violation.
How much does it cost to fix aluminum wiring?
Pigtailing every connection in a typical NWA home typically runs $1,500 to $4,000 depending on the number of outlets, switches, and fixtures. A full rewire is significantly more. The right number for your home depends on its size and wiring condition.
Can I sell a house with aluminum wiring in Arkansas?
Yes, but it must be disclosed and it will come up in the buyer’s inspection. Many buyers will request remediation as a condition of purchase, or factor the cost into their offer. Addressing it before listing removes that negotiating point entirely.
Does aluminum wiring affect home value?
It can. Buyers who know about aluminum wiring concerns may offer less or walk away. Documenting that the issue has been properly addressed by a licensed electrician neutralizes it as a concern and can protect your asking price.
Is aluminum wiring in the panel the same issue as aluminum branch wiring?
No. Aluminum is still commonly used for service entrance conductors, the large wires running from the meter to the main panel, and this is perfectly normal and not a safety concern. The aluminum wiring risk discussed here relates specifically to the smaller aluminum branch circuit wiring running to outlets, switches, and fixtures throughout the home.
Do Not Put This One Off
Aluminum wiring risks are real, but they are also manageable. The right fix, done by a licensed electrician using accepted methods, makes your home safe and gives you documentation to satisfy your insurance company and future buyers.
NWA C&S Electric assesses and remediates aluminum wiring across Springdale, Fayetteville, Rogers, Bentonville, Bella Vista, and the surrounding Northwest Arkansas area. Call us or schedule online to get a clear picture of where your home stands.
Call NWA C&S Electric: (479) 391-8655 | Schedule online at nwacselectric.com
