On Friday 07 October 2016 12:09:35 Dave Cole wrote: > On 10/7/2016 11:48 AM, andy pugh wrote: > > On 7 October 2016 at 15:47, Gene Heskett <[email protected]> wrote: > >>> I have never found aluminium to be non-conductive. > >> > >> Its a good conductor, IF you can achieve a 'gas tight' connection, > >> AND maintain it for decades. > > > > No, really. Get some aluminium and your multimeter. You will find > > that it conducts. > > OK... I'll bite. > > Why does it conduct if there is an insulating coating of Alox on the > surface?? > > Does this give me a clue? > https://www.researchgate.net/post/What_is_aluminium_and_its_oxide_elec >trical_properties2 > > It mentions tunneling. Sounds like a semi conductor property. > > Next question; Why do aluminum electrical connections tend to melt > down sometimes?? I've experienced several aluminum wire to terminal > failures... However most of them were made without the mandatory > anti-corrosive paste. > > Dave > You have found the answer Dave. Alu wire, to me, is a lot like concrete, because folks ask if it will crack, or sometimes if the wire will start a fire. The answer to both is 100% yes, and people who ask if it "will" crack, should be asking "when", not if, because cement will crack, and alu wire "will" start a fire. Cracking cement has not tried to kill me yet, alu wire has made 2 passes at it over the last 50 years. I don't like those odds.
Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
