o*******u
发帖数: 242 | 1 70年代的房子电线都是铝的，我看有人推荐把电源接口处的铝线接上一段铜，不知大家
都这样做么？有没有电工推荐一下？我在旧金山湾区。
谢谢！ |
s**********d
发帖数: 36899 | |
l*****g
发帖数: 3084 | 3 好看，气派
【在 s**********d 的大作中提到】
: 意义何在？
|
v********e
发帖数: 1985 | 4 Aluminum has higher expansion rates that Copper. Outlets and switches that
are not aluminum compatible will cause the wires to become loose and cause
fire. There are code requirements for aluminum compatibilities. |
f****i
发帖数: 20252 | 5 自己干
买个soldering iron
http://www.amazon.com/Portasol-010589330-Super-125-Watt-Heat/dp
【在 o*******u 的大作中提到】
: 70年代的房子电线都是铝的，我看有人推荐把电源接口处的铝线接上一段铜，不知大家
: 都这样做么？有没有电工推荐一下？我在旧金山湾区。
: 谢谢！
|
o*******u
发帖数: 242 | 6 看网上有人用alumconn，好像每个电源接口、开关都要加上，是不是要请电工才行？
【在 v********e 的大作中提到】
: Aluminum has higher expansion rates that Copper. Outlets and switches that
: are not aluminum compatible will cause the wires to become loose and cause
: fire. There are code requirements for aluminum compatibilities.
|
b*a
发帖数: 17670 | 7 铝铜混接有二极管效应，电线易发热
【在 v********e 的大作中提到】
: Aluminum has higher expansion rates that Copper. Outlets and switches that
: are not aluminum compatible will cause the wires to become loose and cause
: fire. There are code requirements for aluminum compatibilities.
|
f****i
发帖数: 20252 | 8 详细说说？
我给你发个包子
【在 b*a 的大作中提到】
: 铝铜混接有二极管效应，电线易发热
|
s**********d
发帖数: 36899 | 9 查了一下还真是这么干的。有两种方法，一种是 copalum,要专门的工具，
电工要有这个系统的license。另一种就是自己用配套的connector接，
不过好坏完全取决于电工水平。 |
f****i
发帖数: 20252 | 10 自己的房子自己干，不需要license
【在 s**********d 的大作中提到】
: 查了一下还真是这么干的。有两种方法，一种是 copalum,要专门的工具，
: 电工要有这个系统的license。另一种就是自己用配套的connector接，
: 不过好坏完全取决于电工水平。
|
|
|
s**********d
发帖数: 36899 | 11
楼主不像有经验的。。。
自己干一般不要license，但是需要知道的还是都要知道，自己的安全问题。
【在 f****i 的大作中提到】
: 自己的房子自己干，不需要license
|
w********r
发帖数: 8704 | 12 ZKSS？
【在 b*a 的大作中提到】
: 铝铜混接有二极管效应，电线易发热
|
w********r
发帖数: 8704 | 13 这个是不是over kill了？
【在 s**********d 的大作中提到】
: 查了一下还真是这么干的。有两种方法，一种是 copalum,要专门的工具，
: 电工要有这个系统的license。另一种就是自己用配套的connector接，
: 不过好坏完全取决于电工水平。
|
f****i
发帖数: 20252 | 14 俺仔细一想，显然不对
二极管需要两半导体材料，他说的应该是原电池反应，放在水里发生的。
【在 w********r 的大作中提到】
: ZKSS？
|
v********e
发帖数: 1985 | 15 http://www.home-inspectors.com/alumwire.htm
"Should I be concerned about a home containing Aluminium Wiring?"
ANSWER
Most electrical wire is made of copper. Copper is predominately used in
residential construction with the exception of the service cable and single
purpose high-amperage circuits such as sub-panels, electrical ranges or air
conditioners. Since copper is a better conductor than aluminum, the aluminum
wire must be larger to safely carry the same current as copper.
Some houses built or remodeled between the early 1950s and late 1970s were
wired with aluminum . This wiring can be identified by the letters AL or the
word ALUMINUM stamped on the plastic covering or cable. Don't confuse the
brand name ALCAN with solely aluminum wiring. Alcan makes both copper and
aluminum wiring for residential purposes.
There are basically three reasons why aluminum wiring may be of concern:
it has a tendency to oxidize which increases the wire's resistance
resulting in the wire overheating at the receptacle
it is more malleable (softer) than copper and therefore easily nicked
because of its high thermal expansion, it has a tendency to change shape
at the terminal screws and thus become loose or creep off
Given its incompatibility with fittings designed for other. metals in the
electrical system, improper connections may cause electrical resistance
which in turn may cause overheating and fire. To overcome the
incompatibility, the aluminum wiring may have been "pigtailed" with copper
using proper connectors, (Marrette-brown; Ideal-purple)
WARNING SIGNS OF UNSAFE ALUMINUM WIRING:
unusually warm or warped outlets and switch cover plates
smoke or sparks coming from receptacles and switches
strange odors in the area of receptacles and switches
untraceable problems with plug-in lights and appliances
periodic flickering of lights
CARE TO BE TAKEN WITH ALUMINUM WIRING:
Do not overfuse aluminum wiring. The AWG (American Wire Gauge) rating of
#12 aluminum wiring is equivalent to #14 copper wiring. Both are rated for
15 amps, so use only the t5 amp rated glass fuse, cartridge fuse or breaker
for aluminum wiring stamped either 12/2 or 12/3.
Copper and Aluminum should never be connected together except using
special anti-oxidant paste and crimped with approved clamp connectors. If
you use twist-on connectors (wire-nuts or marrets) make sure they are
approved for use with aluminum wiring.
When purchasing replacement receptacles, switches or fixtures ensure
that they are compatible for aluminum wiring. Typically, receptacles that
are approved for aluminum wiring will be stamped CO\.ALR, CU-AL or AL-CU
indicating they can be used for both copper and aluminum.
Do not use receptacles stamped with AL and a line through it. These
receptacles are incompatible with aluminum wiring.
As part of your preventive maintenance plan for the home, check switches
and receptacles by removing the cover plates and visually inspecting the
wires
for any signs of scorching, looseness, heat and/or odor.
Aluminum wiring is not handyman-friendly. If you suspect anything
unusual, have a licensed electrician work on circuits with aluminum wiring. |
o*******5
发帖数: 3197 | |
