I can say from experience that running 2 S17s on a 32amp circuit is a pretty bad ordeal.

If you really wanna go at it long term, 1 dedicated 16amp breaker for each machine is a far better choice. However, it might need to be retooled from whatever you are running before.

I used to run 4000W per each phase over a 24amp circuit. A headache to switch them all for sure.