[AFMUG] Smartmeter Security question

[Nate Burke]

I've been reading in the news about the susceptibility of the smartgrid 
and related smartmeters.  They talk about how a compromised smartmeter 
can be made to explode or catch fire on the side of a house.  I'm just 
wondering how this would be accomplished.  Isn't there basically just a 
relay and a current monitor in it.  Do they switch the relay on and off 
rapidly until it overheats?  It seems like eventually the contacts would 
heat up and fuse if that was the case.  Or are they built like a Dr 
Doofenshmirtz innator with a self destruct option included.