What do you called the term where you count all the loads of all building, listing the rating of all loads like aircon, convinience, lights etc.. so you will know the actual apparent power.
Actual Power? Apparent Power? There is some confusion here, at least in my mind. Please clarify.
i believe you are looking for "DIVERSITY FACTOR". In India and IEC countries, this is <1, being the sum total of all loads which are likely to be ON at any one time.
There are many threads in CR4 on this, please search.
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Here's an example: Suppose you have a main pump and a standby pump, but only one of them runs at a time. They both are connected loads, but they are not concurrent. You can size the total system on the basis of maximum concurrent (rather than connected) load.
Sometimes you don't know for sure what the total concurrent load would be. Say you have an apartment building all on one service. Not all of the washers, dryers, AC units, and stoves are likely to be running at once. But if your code allows it, you can apply a "diversity factor"; i.e., some percentage of the total connected load. In the U.S. the code specifies the diversity factors you can use for various numbers of apartment units. It might be like 80% or so.
(The terms "real power" and "apparent power" refer to something else; namely, "power factor," which has been discussed many times on CR4.)
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dhanking23; tornado was the closest to what you were asking. if you had a 40 unit apt building, you would not figure 40 times electric ranges @ 8000 watts each, or 40 electric dryers @ 5000 watts each! look in the 2011 national electrical code hand book for the de-rating figures that they list. perry
Recomputing of Loads
Re: Recomputing of Loads
