Aluminium Wiring

There are two types of aluminum wiring: solid and stranded.  Solid aluminum wiring was used from the early 1960s to the mid-'70s because it was less expensive than copper and easier to work with, being a softer metal.  Stranded aluminum wiring is still used today in brand new construction for larger-gauge wires, which is not a hazard.  It was later discovered that solid aluminum wiring is a fire hazard in its original installation because it expands and contracts significantly with changes in temperature, which causes it to "creep" out of connections over time.  This creates loose connections, which cause arching as the electricity jumps between the connections like lightning bolts.  This can cause fires.

So, is solid aluminum wiring dangerous? Yes, it can be - but it can be made completely safe.  If you are buying or selling a house full of aluminum wiring, that doesn't mean you will need to completely re-wire the house.  A licensed electrician can replace all the main connections with copper using special components that eliminate the danger.

If you are buying a house with aluminum wiring, have all connections inspected by a licensed electrician (switches, lights, outlets, etc) to determine if it is safe; also, you will want to consult with your insurance company before sale closing to verify their policy, as it is a high-cost item to replace with copper.  

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ALWAYS hire a professional to inspect electrical components of your home - NEVER remove breaker panels unless you are qualified to do so.

Written by:

DONOVAN ILLIG

Home Inspector & Residential Environmentalist

Premium Home Inspections Ltd.

250-617-3378 | donovan@premiumhi.net

CPBC License #71217

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