how to connect the 6 lead terminals, 3phase ac motor to run on a single phase source using a capacitor starter

I don't think it's possible..

What you propose is doable, and I've done it and more than once. Not only that, but nearly every rotary 3-phase converter on the market is just a shaftless 3-phase motor with a capacitor start bank providing the phase lag for the 3rd leg. If you want the system to be fully automatic (so that you don't have to manually disconnect the capacitors when the motor is up to speed), you need some more components, like a potential relay. Google "rotary phase converter" for plans.

I've also documented the last one I personally built, here:

http://www.airraidsirens.com/proj_3phase.html

-Adam (also a BSEE)

I don't know where you get your 30% reduction figure from. You can use a capacitor to get the thing to run with little or no load, but 70% of rated power?...............I very much doubt it.

Also 15kw is a massive power from single phase. Along with the terrible power factor you will have, expect far more current than a standard 13A outlet is going to give you.

that doesnt seem like it will work, regardless of the capacitors. a polyphase motor is wired so that the phase difference causes a rotating magnetic field to drive the rotor.

edit: apparently some 3-phase motors are wound so that you can convert them to single phase 220v applications. these are not typical, however and the enclosure for the terminals would show the correct wiring configuration for what you want if the motor is wound properly.

Hire some one to do it.