South Substation and Charlie’s Produce Trucks
I don’t know much about Charlie’s Produce other than they have a lot of trucks and they keep pretty busy. They were coming and going the whole time I was here, prowling around Seattle’s South Substation looking for photographs. So far, nobody’s arrested me for pointing my camera at electrical infrastructure.
South Substation is the biggest in the city and receives juice from four high-voltage lines, stepping it down for distribution to, presumably, the southern half of the city. A line is a set of three wires. A generator outputs to one line. A six-armed transmission tower holds two lines. A step-down transformer in a substation like this one takes power from one high-voltage line and outputs it to several lower-voltage lines. Such a transformer is about the size of one of Charlie’s trucks and has three huge insulators sticking up to receive the incoming line. The output lines exit through underground conduit, so you typically don’t see them.