Thought I would run this by you guys since its been a while since I did this sort of calculation.

I work for a government agency and the warehouse guy picked up a 4 foot tall fan from another dept. The fan has a twistlock plug and a 3 hp, 230/480 volt, 3phase motor. With fla 9/4.4 Amps. SF 1.15.

No starter, no overload protection. He states that he saw it work at the other place when plugged in. I already told the boss we are not going to be hot plugging this thing in and out.

We have fused discos in stock so I came up with the idea of using a fused disco with RK5 fuses at 12 amps. Using 230 volts FLA 9 * 1.25 = 11.25 then round up.

Is this a stupid idea? If so then let me know and I will get a starter.

If I get a starter the heater tables for a starter list the following heaters: 10A - 11A and 11A - 12A. Which one do I get? I figure to round up.