Does t9 have to run off 240? and other meditations...

Hello,

I picked up some t9+'s and am eager to set them up.

1) I can do all sorts of residential wiring safely. Is it enough to plug these into a 240 volt dedicated circuit?

1a) I have a plug that is for 240v. One of the prongs is a full 90 degrees, which I don't see ever in residential wiring. Should I order an outlet for this individually, or is it more practical to use a dryer cord? again, i wire this shit no problem, availability of a 240 volt outlet isnt an issue

2) Surge protector? If so, recommendations? If not, why? I hear the psu effectively controls the voltage when it converts it to ?12 volts. yay? nay?

3) Can T9+ run off 120?

4) The psu I bought alongside them don't have a switch. Is there an order of operations for plugging this thing in? Or, possibly, is the intention that I should be using a pdu switching unit anyway?

Thanks in advance. Forensic opinions highly valued.