Aluminum Wiring

The use of aluminum wiring is common practice in many areas (especially in the Phoenix area) for major appliances such as kitchen ranges and electric dryers. (which are run on 220-volt circuitry)

While aluminum connections in general, have a greater potential to come loose or exhibit other problems than copper, the concern is NOT as great on major appliance circuits as it would be if the wiring were on older 110-volt household circuits. There are several reasons for this lower level of concern with 220-volt circuitry:

1.  Normally there are only two connection points in the circuit ? at the appliance and at the distribution panel; Multi-stranded conductors are used

2.  The connection points or lugs are of a different design than that found in a household receptacle

3.  The wire connection usually is straight without a sharp bend or crimp

4.  The heavier wire used does not bend or crimp as easily as the smaller gauge wire some crimping is less to be an issue

5.  Oxide inhibitors can be applied to the exposed wire at the terminals to cut down on oxidation

6.  Major appliances and their currents are more likely installed by qualified professional electricians, whereas household wiring is often installed or worked on by apprentices or homeowners

In any case, it would be a good idea to have all aluminum connections checked periodically as a precautionary measure.