...or, to be absolutely correct, this node should be titled 'Sub Station', because that was the actual name of said eatery. It's also one of the few places I've been able to get a decent sub sandwich.

That being said, a substation is the part of the power grid that reduces the ridiculously large voltage produced by the current to something that is a bit more managable.

...and after reading bitter_engineer's comments below, I feel compelled to add that the voltage that it's stepped down from is usually on the order of 160kV, or in other words, a metric assload.

I was formerly employed by an electric cooperative, and I once saw a substation burn to the ground, because some pole-climber left the shorting screws in a CT. It was quite impressive.