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Solid aluminum electrical wiring was the go-to option from the 1960s to the 1970s because it was cheaper and had good electrical conductivity. Unfortunately, it can come with some risks if it’s not properly installed, maintained, and updated as needed.
Common Problems with Aluminum Electrical Wiring
- Fire hazard – Aluminum wiring is notorious for causing electrical fires, and there are a few reasons why:
- Loose connections –Aluminum expands and contracts more than copper during temperature fluctuations, which can cause arcing.
- Oxidation – Starts when aluminum is exposed to air or moisture. Oxidized wiring doesn’t conduct electricity well, and the increased resistance can lead to overheating.
- Damaged insulation – Exposed conductors can cause:
- An electric shock
- A short, which can lead to arcing
- Outlets, switches, and breakers may not be rated for aluminum wiring.
- Improper modification – Homeowners’ attempts at making their wiring safer can have the opposite effect if aluminum wire is modified incorrectly.
- Lower conductivity than copper – Aluminum wiring may struggle to carry the same load as copper wiring of a similar size, leading to circuits that can’t handle the demand of modern appliances.
Warning Signs to Watch For
- Warm or discolored outlets and switches
- Flickering lights
- Frequent breaker trips
- A burning smell near outlets
- Buzzing or crackling sounds
Should You Replace Aluminum Wiring?
There are a few cases where replacement is the safest option – especially if:
- Your wiring is severely deteriorated,
- There’s a history of electrical issues,
- Your home is undergoing major renovations.
However, in other cases, solid aluminum electrical wiring doesn’t need to be completely replaced. Instead, you can hire a professional to inspect and replace all the main connections with copper using special components to eliminate the danger.
Stranded aluminum is used in larger-gauge wires and typically isn’t a hazard when used in the right settings.
If you’re planning to buy an older home – or worried about aluminum wiring in your current home – contact the MAS Pro team, and we’ll send someone out to inspect your system, identify any risks, and guide you on the safest solution for your home.
