Materials used in wire have varied over the years. Copper has always been the first choice because it is such a good conductor and is very flexible. In the 1960 to 1970’s, aluminum wire became popular due to the rising cost of copper. Insulation was usually rubber although rubber tended to corrode due to exposure to moisture and air. PVC compounds are now used most commonly as wire insulation. Insulation is made in different colors to identify wiring circuits in a system.
The majority of homeowners will not mess around with the electric meter or service disconnect and leave these up to the utility company or hire an electrician. However, you might work with the electrical panel. Whether you're installing a new panel or making repairs on an old one, it's very important that you get it right. After all, this is the hub for your entire home's electricity.
Keyinsp - Source Of All Wiring Diagram
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