Home Electricity
New Electrical Work
Modification of Old Electrical Work

How do you connect a number 12 aluminum wire to a number 14 copper wire?


Top Answer
User Avatar
Wiki User
2015-07-14 15:55:02
2015-07-14 15:55:02

AMP (part of Tyco) manufactures the COPALUM system. It's a form of pigtailing, but the electrician uses a special machine that applies (IIRC) over 20 tons of force to the crimp. When it's done, it is as safe as you can possibly get with the notoriously unsafe aluminum wiring.

12-gauge aluminum and 14-gauge copper both handle 15 amps, so that's okay.

The proper way is to get a licensed electrican with aluminum experience to "pig-tail" all the aluminum wire in the entire house. This way you wind up with only copper wires to work with. I live in an area with a LOT of aluminum wiring and made a nice living for awhile doing pigtail work. You use the anti-oxidant compound and al/cu connectors. But the important part is to make sure that the connection is made correctly--something a lot of inexperienced electricians might mess us--and that the wire is skinned back so that it had not been abraded or oxidized in any way. It costs a few dollars, but unless you are ready to have your house burn down, it is worth it.

electrical supply stores carry a wire nut made for cop to alum connections

I very strongly do-not recommend the use of two dissembler metels in wiring. You are asking for TROUBLE big time! When two metels are put together they set up a reaction called electrolysis which causes currosion. This causes the junction to heat which is a major cause of electrical fires! Aluminum may be cheap but better forgotten. Aluminum also has more resistance than copper and therefore requires a lot larger wire. If you don't mind dim lights, hard starting motors that heat because of the lack of available power ect. Well I hope you got the idea. Aluminum is better to make pop cans out of!

I'm sure the guy meant "dissimilar," but I agree - DON'T DO IT!

When connecting aluminum and copper wiring together you must use devices marked CU AL which are designed to keep the 2 wires from touching each other. Best advice is to absolutely not use aluminum wiring!

Don't forget that if you have to use Aluminum wiring you should coat all your connections with an anti-oxidizing paste to lower the fire hazard. 3M also makes a crimp type tool and connectors that can be used with it to make a aluminum to copper connection (IF ABSOLUTELY NECESSARY). It works better than the AL-CU nut type connectors.

3M also makes a handy little wire nut specifically designed to connect aluminum and copper wires that already contains an anti-corrosion compound probably the simplest and easiest method.

User Avatar

Related Questions

Copper is preferable to aluminum and the size of wire should be the same or the next size down if copper is used.

No, do not mix aluminum wire with copper wire.

In the electrical trade aluminum wire is equivalent to copper wire as it is also used to carry current. To carry the same current as copper wire aluminum wire is up sized to meet the same ampacity.

Typically copper wire has a brown or brass color and aluminum has a white, nickel, or "silver" color. But there exists copper-clad aluminum that will look like copper but is sized and installed as aluminum. Since aluminum is softer than copper it will bend much easier than copper wire. This difference requires experience or a piece of wire to compare.

No and the reverse is not true either, you can't use copper wire for an aluminium leg.

Aluminium wire has high resistance than Copper.

Aluminum has 61% conductivity of copper which results in higher energy losses. So technically you will need a larger size (diameter) aluminum wire compared to copper to get the same results across the end points.

Mainly copper. Both copper and aluminum wire is used in the electrical trade. Copper in the smaller size wires but aluminum becomes more viable when bigger size wire is needed. This is usually 200 amp services and larger. When aluminum wire is used for a specific amperage, one size larger is required than when using copper. The money savings on aluminum wire over copper wire in the larger sizes is about 20%.

When compared by volume, copper is best, then aluminum and finally iron. When compared by weight, aluminum is better than copper. You have to compare by volume because aluminum is so much lighter than copper, an aluminum wire that weighed the same as a copper wire would be much bigger and harder to work with.

You don't. Normal solder will not adhere to aluminum.

If you are asking can you connect aluminum wiring to copper wiring, the answer is yes. With one provision. You must cover the connection with a special compound prior to putting on the wire nuts. This compound is available at Lowe's and Home Depot and Ace.

copper, aluminum, and steel

Do not do it! Aluminum and copper or dissimilar metals that expand and contract at different rates. For this reason you should never connect aluminum and copper together. This is a fire waiting to happen. <<>> Look for an approved connector. There are connectors that allow dissimilar wires to be spliced together. Look on the package to see if it has the symbol Al/Cu. These types of connectors are UL/CSA approved.

AWG # 6 copper or AWG # 4 aluminum

Place a piece of aluminum wire into a copper sulphate solution. Aluminum will replace the copper in the copper sulphate and copper will come out of solution and form along the aluminum wire, actually replacing the atoms of aluminum. The chemical equation is 2Al(s) + 3CuSO4(aq) ---> 3Cu(s) + Al2(SO4)3(aq). This kind of reaction is called a single replacement or single displacement.

Standard Romex is a three-strand, solid core wire, individually insulated, in a common sheath to make it easier to pull. For a short time, some manufacturers were making romex with aluminum because the cost of copper was so high, but the aluminum wire was not as good as the copper, and the practice was discontinued.

Copper is an excellent conductor of electricity.

Actually, electrical contractors install copper and sometimes aluminum wire in homes. Copper (and aluminum) are very good conductors of electricity, AND both are relatively inexpensive compared to the better conducting metals such as gold and platinum. Copper and aluminum are malleable (they bend easily), making it easier to install in tight spots, and to bend wire around corners. Copper and aluminum are relatively light for the electrical load they can take, again compared to other conducting metals.

aluminum wire expands and contracts with heat. copper is more stable. unfortunately you have aluminum. in a device connection, its not an issue. just make sure that your connection is secure, by pulling on the individual wires of the connection to be sure the wire doesn't pull apart. what you should check is the screws that hold your aluminum wire at the source, make sure those connections are tight. a loose connection will generate excessive heat.heat will melt metal, plastic, and cook body parts.make sure you are not grounded when you touch the source. I know of no electrician who would use aluminum wire in any application except a service entrance. I used copper on my own houses. Yes. You need special Al or AlCu devices for aluminum. Remeber aluminum reacts with copper so you can't connect aluminum to copper. Idontreallycare - Aluminum wiring was used in houses built in the 60s when there was a shortage of copper due to the Vietnam war. It is no longer used in new construction, but still exists in old houses

You tell the difference between copper and aluminum wires by comparing the weight and colour of the two conductors. The copper wire being the heaviest and the aluminum wire being a silver grey in colour.

Black wire to copper screw, white wire to silver screw, bare copper ground wire to green ground screw.

Copper sulphate is a compound, so copper must be obtained through a chemical reaction. To obtain copper from copper sulfate, do the following: Place a piece of aluminum wire into a copper sulphate solution. Aluminum will replace the copper in the copper sulphate and copper will come out of solution and form along the aluminum wire, actually replacing the atoms of aluminum. The chemical equation is 2Al(s) + 3CuSO4(aq) ---> 3Cu(s) + Al2(SO4)3(aq). This kind of reaction is called a single replacement or single displacement.

Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.