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A step-down transformer, the same shape as and somewhat larger than a garbage can, normally seen bolted to the side of a utility pole in many suburban & rural neighbourhoods.

Pole pigs convert 7,200 or 4,300 volts distribution power down to 120 and 240 volts used by most homes in the United States.
Hey Martha!
Check out that pole pig over there -- the bolts that hold it to the pole are rusted and are about to bust!
That pole pig's going down!!!
by Telephony September 20, 2014
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