So what the Com-Ed rule is saying about your ganged up meters is that the nipple is no good; that you need a real factory 2-gang meter base?
I've never seen an EMT service anywhere, although out here in PA PVC services are common for apartment buildings. Never saw that in Chicago! Don't remember about the Com-Ed book, but in Chicago we had to put all rigid threaded pipe, aluminum or galvanized steel, up to the disconnect or main panel. Even the nipple between the meter and the panel, through the outside wall. Once I had to take apart a newly energized service and replace a 2" EMT nipple, 12" or less long which was back to back from a meter pedestal into the back of a main 200A panel. Com-Ed had pulled in and energized the underground lateral before the city inspector had seen it, and we had temp lights and receptacles running off the new panel already. The inspector failed it and we had to change the nipple. Stupidly, we did it with the meter pedestal still hot, and wouldn't you know, it started raining too!
