{"id":7897,"date":"2021-12-29T10:24:44","date_gmt":"2021-12-29T09:24:44","guid":{"rendered":"https:\/\/businessfinancenews.com\/?p=7897"},"modified":"2022-01-03T01:07:53","modified_gmt":"2022-01-03T00:07:53","slug":"how-to-identify-aluminum-wiring","status":"publish","type":"post","link":"https:\/\/businessfinancenews.com\/re\/how-to-identify-aluminum-wiring\/","title":{"rendered":"How To Identify Aluminum Wiring"},"content":{"rendered":"\n
There are problems associated with this wiring due to its brittleness, expansion properties, oxidation
issues, and deformity when under stress, known and cold flow.
Because of these problems, the connections can become loose, causing electrical arc and ignition of
nearby combustibles which may lead to fires. The Commission has also conducted research that
shows that buildings wired with aluminum wire manufactured before 1972 (“old technology” aluminum
wire) are 55 times more likely to have one or more connections reach “fire hazard conditions” than a
building wired with copper.<\/p>\n\n\n\n
A fundamental principle of electrical safety for wiring in buildings is that high temperatures are
hazardous. While some protection is provided by electrical enclosures, high temperatures can develop
at failing branch circuit connections can lead to fire in many ways. Aluminum-wired connections have
been found to have a very high probability of overheating compared with copper-wired connections.
The aluminum-wired connections that fail tend to progressively deteriorate at a slow rate, and after
many years can reach very high temperature while still remaining electrically functional in the circuits.
A large number of connection burnouts have occurred in aluminum-wired buildings.<\/p>\n\n\n\n
Virtually all of the aluminum wiring was
installed as plastic-sheathed cable (type
NM, often called \u201cRomex\u201d) with no readily
discernable distinction from a cable with
copper conductors. Look at the printed
or embossed markings on the outer jacket
of the electric cables, which are visible in
unfinished basements, attics, or garages.
If necessary, use a flashlight shining on
the surface at a low angle to help make
the embossed markings readable. Cable
with aluminum conductors will have \u201cAl\u201d <\/p>\n\n\n\n
or \u201cAluminum\u201d and other information
marked on one side of the cable jacket
every few feet along its length. (Note: be
sure to read as much of the marking as
possible because the marking \u201cCU-clad\u201d
or \u201cCopper-clad,\u201d in addition to the \u201cAl\u201d
or \u201cAluminum,\u201d means that the cable uses
copper-coated aluminum wire and is not
covered by the repair recommendations
outlined in this article.<\/p>\n\n\n\n
Aluminum and copper-clad aluminum cables are sized at No.10 and No.12 AWG for 20-ampere and 15-ampere rated circuits, respectively, as opposed to No.12 and No.14 AWG for copper conductors.<\/em><\/p>\n\n\n\n The repairs outlined in this article do not apply to larger gauge aluminum wire circuits and connections used for service entrance cables, electric clothes dryers, and cooking ranges.<\/em><\/p>\n\n\n\n If you are unable to identify the type of <\/p>\n\n\n\n Aluminum wiring can be replaced or Replacement of the aluminum branch circuit conductors with copper wire eliminates Install additional copper connecting “splice Every connection of aluminum-to-aluminum or aluminum-to-copper wire should be
wire in your home by this method, but
you suspect that you have aluminum
wire, have a qualified electrician make the
determination.<\/em><\/p>\n\n\n\nWhat Does Aluminum Wiring Look Like?<\/strong><\/h2>\n\n\n\n
Aluminum Wiring Remediation<\/h2>\n\n\n\n
repaired to effectively and permanently reduce the possibility of fire and injury due to
failing (overheating) wire connections and
splices. It is highly recommended that you
hire a qualified electrician to perform this
remediation.
Other than complete replacement of aluminum wire with copper wire, there may<\/em> be numerous potential solutions for the
permanent repair of hazardous aluminum
wire connections and splices. However,
CPSC can recommend repair methods or
products only where there is satisfactory,
documented evidence that the methods or
products meet the following criteria:
\u2022 Safe. The method or product must be
safe and not increase the risk of fire or
other hazards.
\u2022 Effective. The method or product must
be effective and successfully eliminate or
substantially mitigate the fire hazard.
\u2022 Permanent. The method or product
must affect a permanent repair. Methods
or products designed to address temporary or emergency repair situations, but
which may fail over time, are not considered permanent.
Based on these standards, as of the date
of this publication, CPSC approves of only
three methods for a permanent repair.
1) Complete Replacement of Copper
Cable
2) COPALUM Method of Repair
3) Acceptable Alternative Repair
Method\/AlumiConn Connector<\/em><\/p>\n\n\n\nComplete Replacement with Copper
Cable
<\/em><\/h2>\n\n\n\n
the primary cause of the potential hazards,
the aluminum wire itself. Depending on
the architectural style of your home and
the number and locations of unfinished
spaces (e.g., basements and attics), it may
be relatively easy for a qualified electrician
to rewire your home. A new copper wire
branch circuit system would be installed,
and the existing aluminum wire could be
abandoned inside the walls. This is the best
method available; but for many homes,
rewiring with copper is impractical and\/or
prohibitively expensive.<\/em><\/p>\n\n\n\nCOPALUM Method of Repair<\/h3>\n\n\n\n
assembly” wires between the aluminum wire and the wired device (receptacle, switch, or other
device). The connection must be made using only a special connector and special crimping tool
licensed by TYCO \/AMP Corporation (COPALUM Crimp Method).
Permanent repairs using TYCO Electronics \/ AMP COPALUM Crimp Method must be conducted by
authorized electricians. These electricians are thoroughly trained by the manufacturer. This
method, based on extensive testing, is the only method considered by the CPSC to be a permanent
repair along with AlumiConn. connectors.<\/p>\n\n\n\n
As an alternate to rewiring with copper,
CPSC recommends attaching a short
section of copper wire to the ends of the
aluminum wire at connection points (a
technique commonly referred to as \u201cpigtailing\u201d), using a special connector named
COPALUM to join the wires. CPSC staff
considers pigtailing with a COPALUM connector to be a safe and permanent repair of
the existing aluminum wiring. The repair
should include every connection or splice
involving aluminum wire in the home, including outlets, dimmers, switches, fixtures,
appliances, and junction boxes. The repaired system, with short copper wire extensions at every termination throughout the
home, permits the use of standard wiring
devices, including receptacles and switches.
The COPALUM repair method is recommended by CPSC on the basis of CPSC sponsored research, laboratory tests, and
demonstration projects. This repair method
has been thoroughly proven by more than
a quarter of a century of field experience to
provide a permanent, low-resistance electrical connection to aluminum wire. The
COPALUM repair method eliminates the
aluminum connection failure problems and
still uses the existing, installed aluminum
wire. The COPALUM repair method has
been shown to be practical for installation
in an occupied and furnished home.<\/em><\/p>\n\n\n\n
repaired in order to obtain the maximum
benefit from such repair work. All appliances connected directly to No.12 or No.10
AWG aluminum branch circuit wiring (e.g.,
dishwashers, cooling equipment, heaters,
air conditioners, and light fixtures) must be
repaired in addition to wall outlets, switches, junction boxes, and panel boxes.
The COPALUM connector is a specially
designed system that includes a metal sleeve
intended to be installed only with a dedicated power tool and crimping die to make
a permanent connection, that is, in effect,
a cold weld (the precision dies in the COPALUM tool compress the connector and
wires using upwards of 10,000 pounds of
force, as required to make the permanent
aluminum wire connection).<\/em><\/p>\n\n\n\n