If your Fremont home was built or rewired in the 1960s or 1970s, it may have aluminum branch wiring — and that’s worth taking seriously.
Why aluminum wiring is a concern
Aluminum expands and contracts more than copper as it heats and cools. Over time, connections at outlets, switches, and the panel can loosen, corrode, and overheat — a leading cause of connection fires.
How to tell if you have it
- Look at exposed cable in the attic, basement, or panel — aluminum wiring is often printed with “AL” or “ALUMINUM.”
- Homes built roughly 1965–1975 are the most common.
- When in doubt, have an electrician inspect it — don’t rely on a guess.
Your options
You don’t necessarily have to rip out every wire. Common fixes include:
- COPALUM or AlumiConn connectors — special connectors that create a safe, permanent copper-to-aluminum bond at each device. Often the most cost-effective fix.
- Pigtailing — attaching a short copper wire to the aluminum at each connection (must be done with approved connectors).
- Full rewiring — the most thorough option, often paired with a panel upgrade.
Don’t DIY this one
Aluminum connections require specific, approved methods and materials. A wrong repair can be more dangerous than the original wiring. See the broader signs your home needs rewiring.
Concerned you might have aluminum wiring? See our wiring and rewiring service, or get a free quote for an inspection in Fremont.