hey guys,
I'm sure this has been beaten to death in the past but would greatly appreciate a bit of input.

1. How many S9s can I safely connect to a 220V 50A line?
I was reading that each S9 needs about 7-8A.
So I was thinking that 5 should be ok. Please correct me if I'm wrong.
2. Would 6 be pushing it and be out of the safe limits???
3. What gauge wire should be used for such a line?
4. Any recommendations for an affordable, time-tested switched pdu? ($200-$250 range)

I'm setting up a small op, will be starting with 3 but planning on adding more soon.

any help is greatly appreciated
thx