Diversity factor for electrical equipment load summation

[Anonymous]

whenever we combine distribution panels total estimated demands, we usually multiply  the total by a diversity factor to account for non-coincidence of maximum demands of all panels occurring at the same time, this is not possible in REVIT, adding diversity factor when moving in electrical panels connections up to MDB and transformers is crucial

[Martin__Schmid]

Hi @Anonymous - there are a number of ways that Revit can apply diversity factors to account for such non-coincidence.  In fact, even within a single panel, there are ways to apply diversity (e.g., see the example of elevators, clothes driers, or x-rays.. a factor is applied depending on how many are connected).  These demand factors propagate up through the distribution.  For example, 4 elevators on one panel could have a total demand of 85%... if there was two such panels connected to a common main panel, the total of 8 elevators would result in a demand of 75%.

Alternatively, you could create a calculated field in the panel schedule to compute such a diversity if it is just a factor of the total connected load.  Would that be sufficient?  Example is shown below.  In such case, perhaps you'd want to remove the <Total Estimated Demand> and <Total Estimated Demand Current> properties?

[Anonymous]

Hi @Martin__Schmid

-the first option is not applicable to my case since this is applicable to NEC only but in our case, we apply a fixed diversity factor to a switchboard which is more similar IEC and common practice in the middle east

- the second option has an operational drawback since upstream and downstream panels are recognized as a single category in Revit "electrical equipment", so users will see diversity and demand factors in both panels resulting in filling diversity for distribution panel and demand for upstream switchboard or vice versa