#10: What kind of idiot coats good copper wire with aluminum? It might look like tin, but aluminum is one of the worst materials to make a reliable electrical connection - it oxidizes rapidly, and the oxide is non-conductive.
No, it's WORSE than non-conductive. It's resistive. Which means that it heats up when the current gets high, easily causing fires. AND it changes size more than other metals when changing temperatures, which means that it works its way loose quickly. Most commercial buildings that have large aluminum conductors have a policy (or are required to have a policy) of re-torquing all the connections once a year.
In this application aluminum makes an effective solder. It's purpose is to fill the spaces in the twisted wires, thereby preventing corrosion. It is not applied to give strength to the joint. There is more to the video than what's shown in this short clip. Normally in soldering the base metal (the copper wire) is heated, which then melts the solder. To bond the temperature of the base metal has to be at or above the melting point of the solder. Flux is applied to prevent the formation of oxides during heating. In the clip the aluminum is melted, the dross (oxide) skimmed off, and then applied to the preheated and fluxed base metal before oxide can form on the surface of the freshly cleaned molten aluminum. The formation of oxides and galvanic corrosion occur in the presence of oxygen and moisture. Since soldering is a bonded connection, which exludes oxygen and moisture, neither can occur within the joint. Aluminum oxide will form on the surface, but not within the joint. All soldering and brazing is the joining of dissimilar metals. It is used because it precludes the ocurrence of galvanic corrosion. The most common metals used for low temperature soldering are lead, lead/tin alloys, and tin/zinc/antimony alloys. Brazing is just soldering at temperatures above 1000 degrees, with appropriate alloy fillers. Thermal expansion and contraction will not affect the joint as it's not a mechanical joint as in lugs or crimped connections. Aluminum solder has some utility, though there are limits. It can't be used in piping for instance, because in that application solder is both a bonded and a mechanical connection, and thermal cycles and vibration will eventually cause the aluminum to crack.
Glad to see how many caught #10. Dielectric grease is needed to tie copper to aluminum. They make a special wire nut for this. They are usually blue and have fins where the wires go in. And I am a carpenter not an electrician
#2: Back 55 years ago when I was repairing phones, whenever you got the report BDR (Bell Don't Ring) and it was in "Da Hood" you made sure to grab your line driver by the blade, rap the set hard 4 or 5 times and stand back. The roaches scurried and the bell rang..
#2 - Can't tell what's happening. Bugs? Looks like shag carpet, but... #5 - Staged? A mouse would asphyxiate, so it'd be more likely to find a dead one. #7 - My current job resembles that, about half the time.
Is "Anonymous" who doesn't realize that "non-conductive" and "resistive" are synonyms the same doofus who puts "grammer" in a rant about bad English?
Non-conductive means it doesn't conduct electricity at all (an insulator). Resistive means that it doesn't conduct well and produces heat as a result (resistance heating).
#5 - I'm thinking the little darling chewed a hole in the bag to gain access, and has been breathing through that. She seems pretty calm, however, so it could be a pet staged for a social media post.
#10 is a bit misleading. I think the container can has molten lead in it, not aluminum. Tossing the AL can and melting it with a torch seems to be more to have the aluminum form an alloy with the impurities floating over the lead which are then scooped out before dipping the copper wires into lead. No matter, is a very dumb way to join house wiring and not to code in the U.S. at all.
Jesus, Mary and Joseph, aren't we a lot of electrical and metallurgy engineers today! I'm not sure what sort of "house wiring" we're looking at here because there is no box and this isn't solid copper, like romex cable, just individual stranded wires protruding from a hole in drywall. In any case the whole lead/aluminum (or whatever it is) melt, skim and dip procedure sure looks like a long row to hoe for not a lot of results. Just give me some wire nuts and be done with it without burning the place down please.
#10 You'll see worse if you take apart some of the devices you bought from China. Seriously, inside of the pretty plastic housing is cheap, shoddy and dangerous.
#4....Get an annulment NOW! You should have never married an evil tempered tough guy with a man bun. Put your picture on this site and you will have a flood of nice men wanting to marry you. Mufflerking, not anonymous
#10 is BS social media fakery. The final melted product in that can is NOT aluminum. They heated up the can enough to burn the paint, and swapped it out for a lead/tin based solder. The heat required to melt and keep liquid that much aluminum would burn off the inner and outer coating and completely wreck the can itself. Aluminum is typically melted either with electric current or in a furnace in a high temp crucible, because it is such an efficient heat conductor. Total nonsense meant to generate views and drive ad revenue.
#3 I have a black lab that does the same happy dance with a tennis ball if you don't throw it quickly enough. Pure joy, dance, dance, dance! She is 9 years old and still dances!
#3 made me sad. My son got a black Australian cattle dog as a rescue.We loved him. Problem was he needed $2500 of hip surgery from ball-playing. Vet told him what caused the first one was going to cause the next one. We could not afford it and the balls disappeared...I don't think he ever understood the reason...
#10: What kind of idiot coats good copper wire with aluminum? It might look like tin, but aluminum is one of the worst materials to make a reliable electrical connection - it oxidizes rapidly, and the oxide is non-conductive.
ReplyDeleteNo, it's WORSE than non-conductive. It's resistive. Which means that it heats up when the current gets high, easily causing fires. AND it changes size more than other metals when changing temperatures, which means that it works its way loose quickly. Most commercial buildings that have large aluminum conductors have a policy (or are required to have a policy) of re-torquing all the connections once a year.
Delete-John G.
Thanks. Already checked my "learned something new" box today!
DeleteCorrosion caused by galvanic response to dissimilar metals!
DeleteIn this application aluminum makes an effective solder. It's purpose is to fill the spaces in the twisted wires, thereby preventing corrosion. It is not applied to give strength to the joint.
DeleteThere is more to the video than what's shown in this short clip.
Normally in soldering the base metal (the copper wire) is heated, which then melts the solder. To bond the temperature of the base metal has to be at or above the melting point of the solder. Flux is applied to prevent the formation of oxides during heating.
In the clip the aluminum is melted, the dross (oxide) skimmed off, and then applied to the preheated and fluxed base metal before oxide can form on the surface of the freshly cleaned molten aluminum.
The formation of oxides and galvanic corrosion occur in the presence of oxygen and moisture. Since soldering is a bonded connection, which exludes oxygen and moisture, neither can occur within the joint. Aluminum oxide will form on the surface, but not within the joint. All soldering and brazing is the joining of dissimilar metals. It is used because it precludes the ocurrence of galvanic corrosion.
The most common metals used for low temperature soldering are lead, lead/tin alloys, and tin/zinc/antimony alloys. Brazing is just soldering at temperatures above 1000 degrees, with appropriate alloy fillers.
Thermal expansion and contraction will not affect the joint as it's not a mechanical joint as in lugs or crimped connections.
Aluminum solder has some utility, though there are limits. It can't be used in piping for instance, because in that application solder is both a bonded and a mechanical connection, and thermal cycles and vibration will eventually cause the aluminum to crack.
#10 Is that aluminum coating copper? Didnt we burn a bunch of house trailers when the aluminum to copper connections corroded and overheated?
ReplyDeleteYes
DeleteHorton homes in the 70's and 80's did that.
DeleteMay I please have a loaf of Mouse shit.
ReplyDelete#4 Liberals would say. We don't have a mouse problem. We have a bread problem.
ReplyDeleteTHAT!^^^^
Delete#10 coming soon high tech American salvage lessons as the CCP owned Meat Puppet collects his 10% for the "Big Guy".
ReplyDelete#3 What ta hell ya gotta do to communicate with these damn humans. It's ball time man!
ReplyDeleteTest Post
ReplyDeleteGlad to see how many caught #10. Dielectric grease is needed to tie copper to aluminum. They make a special wire nut for this. They are usually blue and have fins where the wires go in. And I am a carpenter not an electrician
ReplyDelete#2 Look
ReplyDelete#2 Flashback to my ex’s place, a decade post-divorce.
ReplyDeleteLooks too big to be carpet beetles.
—RosalingJ
#2: Back 55 years ago when I was repairing phones, whenever you got the report BDR (Bell Don't Ring) and it was in "Da Hood" you made sure to grab your line driver by the blade, rap the set hard 4 or 5 times and stand back. The roaches scurried and the bell rang..
ReplyDelete#2 - Can't tell what's happening. Bugs? Looks like shag carpet, but...
ReplyDelete#5 - Staged? A mouse would asphyxiate, so it'd be more likely to find a dead one.
#7 - My current job resembles that, about half the time.
Is "Anonymous" who doesn't realize that "non-conductive" and "resistive" are synonyms the same doofus who puts "grammer" in a rant about bad English?
Good morning. Happy weekend!
- Mr. Mayo
Non-conductive means it doesn't conduct electricity at all (an insulator).
DeleteResistive means that it doesn't conduct well and produces heat as a result (resistance heating).
#5 - I'm thinking the little darling chewed a hole in the bag to gain access, and has been breathing through that. She seems pretty calm, however, so it could be a pet staged for a social media post.
Delete#10 is a bit misleading. I think the container can has molten lead in it, not aluminum. Tossing the AL can and melting it with a torch seems to be more to have the aluminum form an alloy with the impurities floating over the lead which are then scooped out before dipping the copper wires into lead. No matter, is a very dumb way to join house wiring and not to code in the U.S. at all.
ReplyDeleteDing Ding we have a winner. The aluminum acts as a flux to remove the oxides and make them float to the top. Probably not lead, but solder.
DeleteMuch like beeswax when smelting used bullets or wheelweights.
Jesus, Mary and Joseph, aren't we a lot of electrical and metallurgy engineers today! I'm not sure what sort of "house wiring" we're looking at here because there is no box and this isn't solid copper, like romex cable, just individual stranded wires protruding from a hole in drywall. In any case the whole lead/aluminum (or whatever it is) melt, skim and dip procedure sure looks like a long row to hoe for not a lot of results. Just give me some wire nuts and be done with it without burning the place down please.
Delete#10 You'll see worse if you take apart some of the devices you bought from China. Seriously, inside of the pretty plastic housing is cheap, shoddy and dangerous.
ReplyDelete#4....Get an annulment NOW! You should have never married an evil tempered tough guy with a man bun. Put your picture on this site and you will have a flood of nice men wanting to marry you. Mufflerking, not anonymous
ReplyDelete#10 is BS social media fakery. The final melted product in that can is NOT aluminum. They heated up the can enough to burn the paint, and swapped it out for a lead/tin based solder. The heat required to melt and keep liquid that much aluminum would burn off the inner and outer coating and completely wreck the can itself. Aluminum is typically melted either with electric current or in a furnace in a high temp crucible, because it is such an efficient heat conductor. Total nonsense meant to generate views and drive ad revenue.
ReplyDelete#1 - I am impressed about her abs but I am far more impressed with her nice camel toe.
ReplyDelete#3 I have a black lab that does the same happy dance with a tennis ball if you don't throw it quickly enough. Pure joy, dance, dance, dance! She is 9 years old and still dances!
ReplyDelete#3 made me sad. My son got a black Australian cattle dog as a rescue.We loved him. Problem was he needed $2500 of hip surgery from ball-playing. Vet told him what caused the first one was going to cause the next one. We could not afford it and the balls disappeared...I don't think he ever understood the reason...
ReplyDelete#1- With that amount of stomach and abdominal muscle control, just think of the other possibilities….
ReplyDelete#4: FOOD FIGHT!!!
ReplyDeleteSeriously though, I sense some anger issues in Mr. Man Bun there. I shudder to think what might happen if she cooks the organic tofu too long.
#8: He looks upset, like something didn't go according to plan. Not sure what he was expecting.
#10: Yeah, that will totally not oxidize or react over time and will certainly never create any fire risk.