Re: alumunin wiring
Hi, this info and more can be found if you click on "links" at Mike Holts main page. Then click on aluminum wiring. "Replace The Outlets And Switches
The other repair recommended by the industry uses switches and outlets labeled "CO/ALR". Underwriters Laboratories Inc. (UL) lists these devices especially for use with aluminum wire, although they can be used with copper or copper-clad wire. CO/ALR devices perform better with aluminum wire when installed carefully and according to best electrical practices than do the types of switches and outlets usually used in the original installations of old technology aluminum branch circuit wiring. However, CO/ALR connectors are not available for all parts of the wiring system (for example, for permanently-wired appliances and ceiling mounted light fixtures, GFCI outlets, etc). CO/ALR devices must be considered to be, at best, an incomplete repair. Further, CO/ALR wiring devices have failed in laboratory tests when connected to
aluminum wire typical of that installed in existing homes. The test conditions simulated actual use conditions; no "overstress" type of testing was used.
NOTE: If you have an aluminum wire termination in your home which exhibits symptoms of failure, twist-on connector pigtails or CO/ALR devices may be used as an emergency temporary repair for a failed aluminum termination. Should such a repair be performed, it is recommended that you arrange to have your home rewired or the COPALUM crimp connector repair performed as soon as possible.
Many homes still have the original wiring devices, and these stand a good chance of being the CU-AL type or the unmarked type. They are also getting pretty old, so that receptacles may be having trouble gripping plugs, and switches may be failing. Bending and handling of the wire should be kept to a minimum. The wire at each connection should be cleaned of oxidation, and non-flammable, anti-corrosion paste should be applied. This is not a do-it-yourself project when aluminum wire is involved.
Tighten and Check All Connections".
[ August 11, 2005, 10:05 PM: Message edited by: GG ]