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 Aluminum Wiring Information on Twist-On Connector Repairs
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US CPSC information about testing & performance of twist on connectors used for aluminum wiring repair.
U.S. CPSC information on twist on connectorts
 This document has been typed verbatim from the CPSC document and is straight ASCII text.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
L O G O F M E E T I N G
SUBJECT: Twist-on Wire Connectors for Aluminum Wire
DATE: June 1, 1995 PLACE: Room 410 B/C
East West Towers
DATE OF LOG ENTRY: June 15, 1995
SOURCE OF LOG ENTRY: William H. King, Jr. ESEE
CPSC PARTICIPANTS:
William H. King, Jr. ESEE
Andrew Stadnik, ES
Linda Edwards, ESEE
Aaron Banerjee, ESEE
Ed Krawied, ESEE
Marc Schoem, CCA (a.m. only)
John Fitch, CCA (p.m. only)
NON-CPSC PARTICIPANTS:
Jerry Kopstein, Underwriters Laboratories INC. (UL)
Jake Killinger, UL
Jim Beyreis, UL
Peter Pollak, Aluminum Association
Phil Sawyer, Ideal Industries, Inc.
Bill Blaha, Ideal Industries, Inc.
SUMMARY:
Following the recent announcement by Underwriters
Laboratories Inc. that a twist-on wire connector has been listed
by UL for use with aluminum-to-copper conductors for the first
time since 1987, CPSC staff raised safety concerns with the
application of this product to existing homes wired with aluminum
wiring. Those concerns led to the meeting covered by this log.
Mr. King provided the explanation of the CPSC staff concerns
as documented in CPSC letter of May 1, 1995 to UL. UL, Ideal
and the CPSC staff discussed their position and views on each of
the ten issues covered in the letter.
Following the exchange of views, the parties agreed to the
following:
1. CPSC staff will provide UL with copies of the reports
that led to the selection of the aluminum wiring repair
recommendations contained in the CPSC booklet "Repairing Aluminum
Wiring". CPSC will also provide copies of reports related to
environmental testing of electrical connections involving
aluminum wire, and testing of twist-on connectors with aluminum
wire.
2. UL will consider further how representative the aluminum
wire stock used in the UL testing is to conductors installed in
homes.
3. UL will consider inclusion of environmental test
conditions in the performance requirements of their standard.
4. UL will review the human factors issues involved in
consumer application of twist-on connectors for aluminum wire.
5. UL will consider hot-wire ignition as a test method
applicable to flammable parts of the twist-on connector for
aluminum wire.
6. UL will consider additional testing of the connector
using electric current flowing between conductors of similar
metals, including AL-to-AL, when these are part of the listed AL-
CU wire combinations.
It was agreed by the parties to get back in touch with each
other, via a conference call, in approximately six weeks from the
date of this meeting to further pursue this matter.
######
Source Files: awtwist2.htm 6/28/95 from - from CPSC
(re-typed from hard copy: DJ Friedman0 6/08/1995)
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Technical Reviewers & References
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 The Aluminum Wiring Information Website Aluminum Wiring Hazards and Repairs: in-depth info, photos, documents. Main Page.
- The Aluminum Electrical Wiring Hazard Explained (in the document you are presently viewing)
- ALUMINUM WIRE REPAIR METHODS to reduce risk in buildings with Aluminum Electrical Wiring - Overview of Acceptable Repair Practices (in the document you are presently viewing)
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- Reducing the Fire Hazards in Aluminum-Wired Homes , Jess Aronstein, Ph.D., This document answers most technical questions about the hazards and remedies of aluminum electrical wiring. Some of the sections of this very thorough document are listed below:
- Fire Hazards With Aluminum to Copper Twist-on Connectors & Acceptable Aluminum Wiring Repair Practices Color Photos, Current Issues. 9/28/95 CPSC Meeting Minutes
- "Is YOUR Aluminum Wiring Safe?" article discussing safety claims made by some people without looking at the wiring, J. Aronstein, 11/21/95
- "Repairing Aluminum Wiring," U.S. Consumer Product Safety Commission Publication CPSC#516 available online
- * Safety Hazards and Safe Inspection Procedures for Electrical and Home Inspectors at Residential Electric Panels
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- Electrical System & Wiring Hazard Inspection, Detection, Cause, Remedy, Prevention - Main Electrical Page
- Electrical Books - Recommended books on electrical inspection, electrical wiring, electrical problem diagnosis, and electrical repair can be found in the Electrical Books section of the InspectAPedia Bookstore. (courtesy of Amazon.com
Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair
 The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 25th Ed., 2012, is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume. Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Enter INSPECTAHRB in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.
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