208V

Run single phase equipment on 3 phase power
Yes. You can run single phase equipment on three phase power.

https://qph.fs.quoracdn.net/main-qimg-e95e0bd3321034811d1b20ea63dc6fb2.webp?.jpg

Benefit
Power from a 3-phase circuit equals voltage multiplied by current multiplied by 1.732 (the square root for 3). As a result, a 3-phase circuit provides 1.732 more power than single phase power, which in turn reduces energy costs. 

Efficiency and Other Benefits of 208 Volt
Efficiency and Other Benefits of 208 Volt Over 120 Volt Input for IT Equipment - Revision #3 - http://www.apc.com/salestools/SADE-5TNQZ7/SADE-5TNQZ7_R3_EN.pdf

Efficiency and Other Benefits of 208 Volt Over 120 Volt Input for IT Equipment - Revision #2 - https://www.apcdistributors.com/white-papers/Power/WP-27%20Efficiency%20and%20Other%20Benefits%20of%20208%20Volt%20Over%20120%20Volt%20Input%20for%20IT%20Equipment.pdf

Global Power
"Generally speaking, most modern servers are rated for 100-240V or 250V operation, much like the majority of today’s consumer electronics. The simple fact is that building a global power supply is oftentimes more cost efficient than building a narrow voltage input range power supply. There is great benefit in being able to simply match a power cord and get running."

120V or 208V for Servers, Storage and Network Equipment - https://www.servethehome.com/120v-208v-power-consumption/

Power Supply Efficiency vs Input Voltage
Why 208 Volt is More Efficient than 110 Volt Input for Server Racks - HostDime Blog - https://www.hostdime.com/blog/208-volt-server/

https://www.hostdime.com/blog/wp-content/uploads/2013/10/xScreen-Shot-2013-10-23-at-11.43.17-AM-e1382543304839.png.pagespeed.ic.aZZ_yfWRS-.webp

https://i.imgur.com/0FBEZ4N.png

"There’s a one to three percent improvement in power supply efficiency with the increased voltage, which will save between $4 and $31 annually per server in electrical cost."

Tons of Cooling
= Volt-amps / 3516.85 = Watts / 3516.85

3516.85 volt-ampere = 1 tons (rt)

https://www.advancedconverter.com/unit-conversions/power-conversion/volt-ampere-to-tons

https://www.advancedconverter.com/unit-conversions/power-conversion/tons-to-volt-ampere