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Home > Archive > Electrical code Compliance > June 2005 > Connection methods for existing aluminum wiring
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Connection methods for existing aluminum wiring
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| John B 2005-06-17, 11:28 pm |
| I have read prior thread (1996) in this forum, explaining theoretical
problems with the bond between aluminum wire and, say, terminals provided on
duplex receptacles. Aluminum has interesting, accelerative failure mode
when too much current is applied.
I see aluminum wire represented in the tables of the 1990 NEC handbook. It
seems to me that the nasty characteristics of aluminum would have been known
to the NFPA authors of the code book, by 1990. Therefore, I assume proper
means of aluminum termination must exist.
http://www.acehardware.com/sm-coope...pi-1294401.html
describes CO/ALR receptacles available at Ace Hardware. These seem to be
suitable for an residential apartment building.
Can anyone advise me on where this might be described in the NEC?
How does anyone connect, say, a dinnertable chandelier, which provides
stranded copper wiring, to aluminum wire providing the power, in the ceiling
junction box?
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| Rusty 2005-06-17, 11:28 pm |
| On , "John B" <jb@nospam.com> wrote:
quote:
>NNTP-Posting-Date: Mon, 28 Feb 2005 13:50:17 MST
>Date: Mon, 28 Feb 2005 12:49:57 -0800
>Xref: sn-us sci.engr.electrical.compliance:17119
>
>I have read prior thread (1996) in this forum, explaining theoretical
>problems with the bond between aluminum wire and, say, terminals provided on
>duplex receptacles. Aluminum has interesting, accelerative failure mode
>when too much current is applied.
>
>I see aluminum wire represented in the tables of the 1990 NEC handbook. It
>seems to me that the nasty characteristics of aluminum would have been known
>to the NFPA authors of the code book, by 1990. Therefore, I assume proper
>means of aluminum termination must exist.
>
>http://www.acehardware.com/sm-coope...pi-1294401.html
>describes CO/ALR receptacles available at Ace Hardware. These seem to be
>suitable for an residential apartment building.
>
>Can anyone advise me on where this might be described in the NEC?
>How does anyone connect, say, a dinnertable chandelier, which provides
>stranded copper wiring, to aluminum wire providing the power, in the ceiling
>junction box?
>
>
Your local electrical supplier, or Home Depot, will have a tube of a
black paste designed for joining copper to aluminum. Coat both wire
ends with the paste. Twist the wires together with lineman pliers,
re-coat the twisted wires and then screw on the appropriate wire nut
(or Marette).
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