Frequently (Not) Asked Questions About Aluminum Cables
Aluminum electrical cables are a popular wiring choice. But do you really know all about it? Here are answers to the questions you didn't know you needed to ask.
When did people start to use aluminum wiring for their homes?
Since electricity was discovered at the end of the 19th century, copper has been the go-to choice for electrical wiring. But in the 1960s, aluminum wiring became an affordable alternative and won the competition over copper.
How are aluminum cables made?
Aluminum can be found in the earth, usually in the form of a silicate or oxide. Most often, it is sourced from bauxite, a mineral, that is further mined and refined. Refining bauxite starts with the Bayer process, followed by applying heat and pressure to it and then combining it with sodium hydroxide. Lastly, the mineral is smelted, which creates 99.8% pure aluminum. For aluminum wiring, the received pure aluminum is molded for sale to manufacturers, who then draw it to create thin, long and flexible wires.
How do I choose between aluminum and copper wiring?
The choice depends on several factors. For example, aluminum wires are more affordable, lighter and provide higher impedance. They are also bigger than copper cables with the same ampacity. At the same time, aluminum cables are less elastic and conductive.
Do I need a connector for aluminum conductors?
Yes, you need connectors labeled with "AL," which stands for aluminum. These come in a variety of types, so look into the product range to get the right one.
What maximum length of an aluminum cable can I get?
Aluminum can be as long as you need it, just make sure to get the correct measurements.
How safe is aluminum wiring for the home?
Aluminum wire is completely safe for use in houses if it is installed properly.
How to make aluminum wires last?
Since aluminum cables are prone to mechanical damage, make sure to avoid bending your wiring during installation. It's best to prevent any rubbing, too. Another crucial thing to keep in mind is that instructions for installation and usage need to be followed strictly — installing your wire in an unsuitable environment can lead to overheating and hence, faults.
How to identify aluminum wiring?
Aluminum wires are quite easy to identify — they are the color of aluminum and marked with "AL" on the jacket, which stands for "aluminum." If you know that a house you're at was built between 1965 and 1973 (in the US), the wiring used in it is most likely aluminum. In houses built later, you can also find "CO/ALR" marks, which stand for "copper/aluminum revised" and imply that it is an aluminum wire with a binding terminal.
Where can I get an aluminum cable?
Nassau National Cable offers a wide choice of Aluminum Electrical Cable. Our extensive collection includes Aluminum Home Feeder Cable, Aluminum SER Cable, Aluminum SEU Cable, and THHN THWN-2 Aluminum Cable, among all. Check out our full catalog or contact our support team to find the exact aluminum wiring you need.
