how to calculate electrical need for network devices

[baselzind]

I was asked by the electrical team how much electricity my network cabinet needs in a new location , so let us say i have 2 switches that each have one psu that draws 350W. That means I'm supposed to tell them i need 350+350=700w? 

[balaji.bandi]

yes if the device fully populating that is a power requirement, you can also see in the product datasheet.

[baselzind]

so electrical technician need the total Watt number not the volt or ampere?

[pieterh · Accepted solution]

there is a relation between the three parameters
you can calculate Watt as Volt * Ampere, Volt is a given in your country
in countries with 110Volt Ampere is about twice that of countries  with 220Volt

-> total Watt is mostly sufficient