Per NEC 230.79(A), for a one-family dwelling, the minimum rating of the service disconnect shall be 100 amperes. Although the calculated load is only 45 amps, the minimum service size for a single-family dwelling cannot be less than 100A regardless of the calculated demand.

Per NEC 230.79(B), for other than single-family dwellings, the service disconnect rating shall not be less than 60 amperes. Since the calculated load is 65 amps, the service disconnect must be sized to the next standard rating of 70 amps, which is the smallest standard rating not less than 65 amps.

Per NEC 230.79(B), for other than single-family dwellings, the service disconnect rating shall not be less than 60 amperes. The calculated load of 58 amps is less than 60A, so the minimum allowed service rating of 60 amps is acceptable and sufficient.

Per NEC 230.79(B), service disconnect rating shall not be less than 60A for non-dwelling loads. Since the calculated demand is 125 amps, the service disconnect must be rated for no less than 125 amps. The minimum standard rating that meets this requirement is 125 amps.

Per NEC 230.79(B), for other than single-family dwellings, the service disconnect shall be rated not less than 60A. Since the calculated demand is 92 amps, the service disconnect must be rated for at least 92 amps. The next standard rating that accommodates this is 100 amps.