[sdiy] Grounding of inputs/outputs for modules

[Chris Muir]

On Aug 3, 2012, at 5:03 PM, David G Dixon wrote:
> In any case, much house wiring used to be made of aluminum.  Our first house
> in BC, built in 1951, had all aluminum wiring.  It was upgraded because the
> aluminum was considered a fire hazard (it probably wasn't), but this worked
> well for 30+ years in those houses.  It neither corroded nor lost
> conductivity.


What a geeky electrician told me is that the problem is one is dissimilar metals. The aluminum to copper junction oxidizes over time, and the resistance goes up, causing more heat to be generated at that junction.


					| In theory, there is no difference between
http://www.xfade.com		| theory and practice. In practice, there is.
   cbm at well.com		|               - Jan L.A. van de Snepscheut