The incoming service for the multifamily dwelling (12 units) building is 120/240V 3ph 4wire high leg delta. The building has a 40HP 3PH elevator. The voltage between phase B and neutral is 208V. Are you able to supply some of the units with "A-B-N" or "B-C-N" from the high leg delta service like what is usually done with 120/208V 3ph 4 wire wye service? If yes, can you calculate the load per 220.82 for the "A-B-N" or "B-C-N" feeder for each unit? Since only A or C phase can be used for the 120V loads in "A-B-N" or "B-C-N" feeder, the loads won't be balanced between A and B or B and C. Is it still reasonable to apply 220.82 when calculate the load and size the feeder? But 220.82 doesn't say you can't apply it to 120/240V 3-wire service with high leg delta. 220.82 doesn't say you are able to use this method only when you are able to balance the loads between phases.