A nameplate is not used capacity
Original diagram. Not a site record.
The capacity cell needs a source, a date, and a unit, or it stays blank. A nameplate, a design kilowatt, and a redundancy graphic are not that number. They are claims about what was drawn. Today's load is a measurement, and only if the point is live.
Blank is allowed. It is better than a design number that will be quoted for a year. Write why it is blank: the measured point is missing, stale, or never in the claim. Do not add design and measured loads into one total on a whiteboard. That total is a new calculation. It does not get signed in the corridor.
Redundancy is the same trap. N+1 on a slide does not tell you what you can still serve if one machine is down tonight. Unless a test showed the remaining capacity with that machine actually out, the redundancy sentence is a design sentence. Note it beside the cell. Do not put it inside.
A future IT load is a plan. Plans do not fill the used cell. They do not fill the available cell unless you can explain the method in one sentence and operate to it.
From Run the Data Center Day, Tristan, Data Center Field Guides. No store link until the Kindle edition is listed.
Related: A green tile is not acceptance.
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