Single family resi ranges from 200-400 amps (320/400). A few McMansions pushed the envelope for 'full 400', and at least 3 have 600 single phase.
The last townhouse subdivision was 150 amp each. The 22 unit condo bldgs have 800, 3 phase, with 100 to each condo.
The condos are off of either a 300 KVA pad, or two bldgs off of a 500KVA pad. Townhouses are BUD, 8 units to a BUD xfr.
As to the drops, '397' is common for 400-600 amp pole pigs.
Some old drops are 6 Al triplex!
