In a message dated 8/31/2007 3:14:15 P.M. Eastern Daylight Time,  
[log in to unmask] writes:

Why is  it that it is much easier to burn down a house with poorly made 
aluminum wire  connections than the same with copper? 



Guess I thought junctions of copper to aluminum built up aluminum oxide,  and 
that is resistive (as in alumina ceramic substrates).  Driving a fairly  
small amount of current across a bit of aluminum oxide creates a lot of heat  
(catching wood on fire). 
 
Denny Fritz



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