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

[ebillinfo pk]

Here is a general way to deal with work out the electrical requirements for network gadgets:

Recognize the organization gadgets: Cause a rundown of the multitude of gadgets that will to be essential for your organization, for example, switches, switches, passages, servers, and capacity gadgets.

Decide power utilization: Allude to the specialized details or documentation gave by the makers to every gadget to track down their power utilization data. Search for values, for example, power rating (in watts) or ebb and flow utilization (in amperes).

Compute power for individual gadgets: Duplicate the voltage rating (in volts) by the ongoing utilization (in amperes) to ascertain the power utilization for every gadget utilizing the equation: Power (in watts) = Voltage (in volts) × Current (in amperes).

Summarize the power prerequisites: Include the power utilization values for every one of the singular gadgets to decide the all out power required for the organization. This all out power necessity will provide you with a gauge of the electrical burden the organization gadgets will put on the power supply.

It's actually quite significant that the power utilization of organization gadgets can fluctuate contingent upon their functional state, like inactive, typical use, or pinnacle load. Try to consider the most powerful utilization situation to supply guarantee a satisfactory power.

Also, it's essential to figure overt repetitiveness and versatility while working out power necessities. Excess power supplies, reinforcement frameworks, and future development ought to be considered to guarantee the organization can deal with extra gadgets or adapt to disappointments without over-burdening the power foundation.

For precise and explicit estimations, it's dependably prudent to counsel the producers' documentation and rules for every gadget and consider talking with a certified electrical technician or organization engineer for complex organization arrangements.

[Joseph W. Doherty]

Yes, that would be a "safe" way to calculate wattage, in your example, but, BTW, often PSU won't be pulling 100% it might.

As another example, consider one switch with dual 350w PSUs.  First question would be is this a redundant PSU setup?  If so, switch would never pull 700w, but as I recall a standby PSU draws some power, it can be a tad more than 350w.

Then there's the situation where switches can use different wattage PSUs, depending on how much power switch may draw (like for PoE devices).  For such, you may want to tell electricians a much higher to maximum power need to allow increasing power draw, in cabinet, without again needing to upgrade power to cabinet.