I did a service upgrade today and these are what I found in the existing meter can. The 4/0 to the left is in 1 1/2 sched 40 PVC. Half the strands have been cut off so it could be double lugged with the original #2. For your violation section.
John Clendenning (jrclen) Electrical Contractor-Electrician Wisconsin
This service is in central Wisconsin (near the Dells Marc). The original service (100 amps) was for a mobile home in the woods. The 4/0 was added for a separate service to the garage/workshop shown in the back ground. I do quite a bit of agriculture work though out here. I bet my apprentice lunch if he could pull the conduit off the 4/0 wires. He did it, but he worked at it. I can't imagine trying to pull them in there. I replaced that can with a Millbank meter/load center with a 200A main. New 100A wires will be run to the shed. New 4/0 runs across the lawn to the new log home. Probably the last 3 wire feeder I'll be able to install with NEC 2008 coming. Main bonding jumper and 2 ground rods at the meter/load center, and again at the house. Lots of barns and sheds and farm houses wired that way from a central, pole mounted load center.
There is probably 5 inches from the bottom of the can to the lugs. An entrance through the bottom would have probably been ok for bending the 4/0. You can see the pliers marks on the 4/0 insulation from the bending method he used. My favorites are the cutting off half the strands and stuffing the 4/0 into 1 1/2 pipe. The flying conduit was great too.