Good evening, I am a home inspector here in Orlando. I came across a house today with two meters. One meter has a normal setup where the service panel is at the exterior which has the main disconnect for a sub panel inside a partitioned section they are using as an apartment setup. This has a 3 wire feed from the meter to the service panel. The other has a 4 wire feed going to the panel for the main house which has the disconnect. The grounds & neutrals aren't bonded there but it looks like they are tied together at the meter. The 4 wire feed to that service panel is throwing me off and isn't anything I see in my line of work. Is this something that needs correcting or is this acceptable?