Within an hour, two squad cars were dispatched to check up on what I was doing. This substation is located on a busy intersection. It is completely visible and accessible on three sides. The fenced-in part is set back 50 yards from the corner.
There weren't any signs: No trespassing, no photography, no picnicking, etc. I was asked for ID and questioned about my intent. I told both sets of officers that I was taking pictures of the substation and that it also served as a good subject for testing out the 24mm Actar. The first set of officers filed a report. I was allowed to continue.
Three days later, I got a call from a PD detective. He wanted to go over the "incident." I explained what I was doing and asked if I'd broken any laws. He said, "No, but you can't be too careful these days." I told him I like to photograph places at night--parking lots, liquor stores, gas stations, etc. The conversation got a bit awkward as I tried to explain why I think those places are interesting subjects.