Aluminum Wiring Replacement
Aluminum wiring was a very popular method of wiring electricity in the mid 60s and early 70s. However, aluminum wiring was latterly replaced with copper wiring for its fire hazard properties. Aluminum wires tend to shrink or expand due to temperature fluctuations and this causes the circuits to break or spark when the wires overheat. Now, copper wiring is considered the safest option as this component has a much higher threshold for heat.
Most old homes however were built with aluminum wiring and replacing the entire electrical wiring system is a very costly affair. However, there is a cheaper and equally safe way to deal with the problem. All you have to do is replace the connection points with copper connection points. This way, rather than replacing your aluminum wiring entirely, you are ensuring that copper is at the point that connects to switches, outlets and circuit breaker.
Never try to do this on your own unless you have good knowledge of upgrading or replacing aluminum wiring safely and securely. Always consult an electrical contractor or better yet, hire them to do the job.