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Rack "Wattage" Calculations


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I love the ability to list out the total weight of a rack, but the Wattage calculation is generally useless. It would be incredible to be able to have total Amperage specified, or even better to be able to notate minimum required circuit amperage and quantity of dedicated circuits.

 

Assigning rack devices to specific circuits within schematics would be a "chef's-kiss" feature to tie this together.

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  • Vectorworks, Inc Employee

Hi @tom-SPL

 

"generally useless" ??? well respectfully, that's just like your opinion man...! Many people find it very useful to know the power consumption of a rack.

 

Each equipment item in a rack each has a power consumption and that's what we add up. Converting that to current consumption involves knowing the voltage of the power supply. This varies according to which country the installation is in. I think the best solution for you is to use a Data Tag that will do the calculation.

The formula you need is Amps = Watts / Volts. That would give you the total Amperage.

 

Regarding your other points, I'm not clear exactly what you mean by this

18 hours ago, tom-SPL said:

even better to be able to notate minimum required circuit amperage and quantity of dedicated circuits.

or

18 hours ago, tom-SPL said:

Assigning rack devices to specific circuits within schematics

Send me a picture of what you want and I'll see what I can come up.

 

Conrad

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I would say 7 out of 10 the racks I am assembling are going past a 20 Amp circuit, that's why the wattage calculation is not helpful for me. I would appreciate a way to set a circuit limit and have the calculation say "2 20A circuits required" "1 20A circuit sufficient", etc, at the rack.

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  • Vectorworks, Inc Employee

@tom-SPL Well that doesn’t need any special programming. You can make a worksheet report of your racks listing the power consumption for each rack. In another column divide the power by the voltage to get the current, then divide that by 20 and round up to the nearest integer to get the number of feeds needed. 

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