How is the kW rating calculated for a 3 phase PDU on the products spec sheet?

On a 3 phase PDU outputting 120V the calculation would be Volts x Amps (80%) x 3 (# of independent conductors). For example, a 30A 3 phase unit outputting 120V would be 120 x 24 x 3=8.6kW. If the PDU is outputting 208V, the calculation would be Volts x Amps (80%) x SQRT(3). The SQRT(3) is used as line voltage for 208V output is derived from using two hot conductors. For example, a 30A 3 phase unit outputting 208V would be 208 x 24 x SQRT(3)=8.6kW.