yes there is. if the meter is a direct reading meter you will have to run the feeders thru the meter and then back to the sub. if it's an indirect read then you just need to put the CTs on the feed wire
Agreed, but if the OP is just trying to measure the use of an area & not collect revenue, there is not likely to be a issue. I put a couple of submeters on my shop, 1 for the well & the other for everything else, never read them though so they are a bit of a waste
One view of them.
A view of the shop meter. (These were pictures that I had found).