Home Inspector Bloomington MN
Electrical defect

Aluminum Branch Wiring

Solid aluminum wiring used for branch circuits (outlets, switches) between roughly 1965 and 1976.

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HomeDefect LibraryAluminum Branch Wiring
What it is: Solid aluminum wiring used for branch circuits (outlets, switches) between roughly 1965 and 1976.

Why it matters

Aluminum expands, contracts and oxidizes differently than copper, loosening connections over time and creating heat at terminations — a recognized fire risk when not properly mitigated.

Aluminum Branch Wiring during a Bloomington MN home inspection

Why it's common in Bloomington

Bloomington's median home age near 1968 places a large share of the housing stock squarely in the aluminum-wiring window, especially 1965–76 ramblers and split-levels.

Signs to watch for

  • warm or discolored outlet/switch plates
  • flickering lights
  • the smell of hot plastic
  • 'AL' or 'aluminum' stamped on the cable jacket

What we check during the inspection

We identify aluminum branch conductors at the panel and accessible devices and note whether approved connectors (e.g., COPALUM or AlumiConn) are present.

How it's typically corrected

Mitigation by a licensed electrician using approved connectors at every device, or a full rewire. Receptacle swaps alone are not a fix.

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