Aluminum branch wiring (common in homes built 1965–1973) isn’t automatically dangerous, but its connections loosen and corrode over time — CPSC data shows a 55× higher fire-hazard risk at connections. Permanent fixes: COPALUM or AlumiConn connectors ($2,500–$5,000 typical) or a full copper rewire.
Between 1965 and 1973, copper prices spiked — and builders across the country, including thousands of homes in Raleigh, Cary, and Garner, switched to aluminum for branch-circuit wiring. It passed code then. Decades later, the connections tell a different story. If your home is from that era, you don’t need to panic — but you do need to know what you have, because insurers, home inspectors, and the CPSC all treat aluminum branch wiring as a known risk.
This guide covers why the risk develops, how to confirm what’s in your walls, what each fix costs, and what insurers expect — so you can handle it once, correctly, with documentation.
Why Aluminum Wiring Becomes Dangerous Over Time
Aluminum is a perfectly good conductor. The problem is what happens at connection points — outlets, switches, fixtures, and junction boxes — over decades of heat cycles.
Expansion & contraction
Aluminum expands and contracts far more than copper with every heat cycle. Over thousands of cycles, connections loosen — loose connections create resistance, resistance creates heat, heat causes fires.
Galvanic corrosion
When aluminum touches copper or brass terminals (most outlets and switches), the metals react. Corrosion raises resistance at the connection, accelerating the overheating problem.
The CPSC finding
Homes with aluminum branch wiring are 55× more likely to have connections reach fire-hazard conditions than copper-wired homes.
“Homes with aluminum wiring are 55 times more likely to reach fire-hazard conditions at wire connections than homes wired with copper.”
— U.S. Consumer Product Safety Commission
How to Know if Your Home Has Aluminum Wiring
Three quick checks — no tools required, and never remove the panel cover.
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Check your build year
Raleigh-area homes built between 1965 and 1973 very likely have aluminum branch wiring. County property records show the year in seconds.
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Look at the panel wires
Through the open door (never remove the cover), wires entering 15–20A breakers that are silver-colored are aluminum; copper is orange-brown.
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Read the cable jacket
In the attic, basement, or garage, Romex-style jackets stamped “AL” or “ALUMINUM” confirm aluminum branch circuits.
Your Remediation Options — From Connectors to Full Rewire
Three paths, each with trade-offs in cost, scope, and long-term protection. All are licensed-electrician work.
COPALUM Crimp Connectors
The CPSC gold standard
- A specially trained electrician crimps a copper pigtail onto each aluminum wire; the copper connects to the device.
- $50–$85 per connection
- $2,500–$5,000 typical home (40–60 points)
Permanent repair
AlumiConn Connectors
The accessible permanent fix
- Set-screw lug connectors create a safe aluminum-to-copper transition — widely available, no proprietary tool.
- $45–$75 per connection
- Similar whole-home totals
Permanent repair
Full Copper Rewire
The most thorough solution
- Replaces all aluminum branch wiring with copper — eliminates the problem entirely. Best during a major renovation.
- $12,000–$20,000
- Depends on size & wall access
Problem eliminated
Check It Yourself, or Call an Electrician?
You Can Check Yourself
- Look at the cable jacket for an “AL” stamp
- Check the panel (door only) for silver-colored wires
- Look up your home’s build year on county records
Call an Electrician If
- You smell burning or see scorch marks
- Wall plates feel warm to the touch
- Outlets spark or crackle when used
- You need remediation for insurance or a home sale
Aluminum Wiring, Insurance, and Selling Your Home
The fire statistics are only half the story. In practice, aluminum branch wiring surfaces at two moments: when you shop for insurance, and when you sell.
Underwriting questions
Many NC insurers ask about aluminum wiring on homes from the era — and may require an inspection, proof of remediation, or charge higher premiums until it’s addressed.
The buyer’s inspection
Home inspectors flag aluminum branch circuits by default. Un-remediated, it becomes a repair credit negotiation — often priced at full-rewire numbers, not connector numbers.
Documentation closes it
A permitted, documented COPALUM/AlumiConn remediation with our connection-count report typically satisfies both insurers and buyers — we provide the paperwork on every job.
Frequently Asked Questions
Clear answers to the most common questions about aluminum wiring in NC homes.
Is aluminum wiring dangerous?
Aluminum itself conducts fine — the danger is at connection points. Expansion/contraction cycles and galvanic corrosion loosen connections over decades, creating heat. The CPSC found aluminum-wired homes are 55× more likely to reach fire-hazard conditions at connections.
Which homes have aluminum wiring?
Homes built between 1965 and 1973 are the main group — copper prices spiked and builders switched. If your Raleigh-area home is from that era, an inspection is worth scheduling.
Is aluminum service entrance cable a problem too?
No. Aluminum for the main service entrance cable (the large wires feeding your panel) is standard, code-compliant, and safe. The concern is 15–20A aluminum branch circuits to outlets, switches, and lights.
Do I have to rewire the whole house?
Usually not. COPALUM or AlumiConn connectors are CPSC-recognized permanent repairs at a fraction of rewire cost. A full copper rewire makes sense during major renovations or when other wiring issues exist.
Are purple AL/CU wire nuts an acceptable fix?
No. The CPSC does not endorse twist-on wire nuts — even AL/CU-rated ones — as a permanent repair for aluminum-to-copper connections. They loosen over time and have been linked to failures.
Will insurance cover a home with aluminum wiring?
Many insurers require an inspection, remediation, or documentation before writing or renewing coverage. A documented COPALUM/AlumiConn remediation typically satisfies them — we provide the paperwork.
What does remediation cost in Raleigh?
Connector-based remediation typically runs $2,500–$5,000 for a typical home (40–60 connection points at $45–$85 each). A full copper rewire runs $12,000–$20,000 depending on size and access.
Can I remediate aluminum wiring myself?
No — COPALUM requires certified tooling and training, and all remediation involves working inside energized boxes. In NC this is licensed-electrician work, and insurers want professional documentation anyway.
How long does aluminum wiring remediation take?
Connector remediation on a typical home (40–60 connection points) usually takes 1–2 days, working room by room with brief circuit outages. A full copper rewire runs 3–7 days depending on size and wall access.
Is aluminum wiring the same problem as knob-and-tube?
No — knob-and-tube is a much older (pre-1950) ungrounded system with different risks and no connector-style fix; it’s typically replaced. Aluminum branch wiring is 1965–1973 and has CPSC-recognized permanent repairs. An inspection identifies which one you actually have.
Get Your Wiring Inspected.
A safety evaluation confirms whether your home has aluminum branch circuits, documents their condition, and prices your remediation options — before anything is decided.
Hugo – Founder & Master Electrician
Hugo has more than 20 years in the electrical trade across Wake County and the Triangle. He built Electric All Pro on one promise: honest work, done right, explained in plain words.