The permit search resulted in a service change in 1991, the exterior closet, knife switch disco's w/30amp sockets were converted to splice box's. the orig, bldg disco was upgraded to a fpe 400a disco and two ge three and four meter sockets fed from a gutter. 2 no. 8 wires one phased white was pulled to each pair of apt feeds and the new flexes from the new meters with a no 12 green for the egc all together in the original shared box lugging to the can. Apt feeds go up two 1 inch ridgeds two wires each, for three apts each side, I believe no 12 but could be 10ga. the 8's in the new meter cans only one wire per each 2pole 40amp bkr.
Now the question I have is. Is it ok to leave as is or replace the 40s with a 30 amp single pole gfi or afci breakers at the main, until later on the when I can coordinate refeeding all six apts with new three wires each and new subs, or is it ok to have just 1 wire on a two pole breaker? as the 1991 install, the contractor now has a expired lic. crs