Materials

• Copper is a good conductor.Image by Flickr.com, courtesy of back home and catching up) (Dawn
  
  Electrical wiring is most commonly made of copper or aluminum. After being drawn through the die, it is coated with an insulating material.
  
  

Heavy Current Loads

• Copper clad aluminum wire is used in residential wiring.Image by Flickr.com, courtesy of Andrew Mason
  
  The 1/0-heavy gauge wire is used to carry high-amperage current loads. This wire is also used for grounding high voltage electrical equipment.
  
  

Residential Wiring

• Power meterImage by Flickr.com, courtesy of Mike DelGaudio
  
  Commonly used in residential wiring, 1/0 copper or copper clad aluminum wire is installed leading into circuit breaker boxes with a 125 ampere main bus.
  
  

Industrial control systems

• Industrial controlsImage by Flickr.com, courtesy of Mirko Tobias Schaefer
  
  Many industrial sites use 1/0-gauge copper or copper clad aluminum wire in control systems. These industrial control systems use heavy gauge wire as both ground and power wiring for controlling factory machinery.
  
  

Audio

• AmplifiersImage by Flickr.com, courtesy of Vincent Liu
  
  Audio amplifiers and public address systems use 1/0-gauge copper wire in their construction. The wire supplies power to amplifiers in both commercial and automotive sound systems as well as ham radio amplifiers.