Diversity Factor on Distribution Panel
Diversity Factor on Distribution Panel
(OP)
Hi,
Is there any standard or accepted practice for a diversity factor value for loads connected to a distribution panel?
Also is there an NFPA, IEEE or NEC rule pertaining to the percent overload on a distribution panel.
regards,
Is there any standard or accepted practice for a diversity factor value for loads connected to a distribution panel?
Also is there an NFPA, IEEE or NEC rule pertaining to the percent overload on a distribution panel.
regards,






RE: Diversity Factor on Distribution Panel
calculating the panel load. Other than that it may be
an engineering decision. You can use a demand recording meter to establish the panel loading.
RE: Diversity Factor on Distribution Panel
Coincident Factor = Peak Demand of System / Sum of Individual Peak Demands
The coincident factor will vary based on the type of load (residential, commercial, or industrial), the geographic location, and the season. I would say it is more an "art" than "science" that is gained from years of experience.
If you can give more details as to the type of loads connected, I can let you know the factors that I most commonly use for your type of application.
RE: Diversity Factor on Distribution Panel
-commercial/industrial building
-loads are HAVC pumps/fans;
-electrical motors connected to various rotating equipment
run about 15 hours per day
-the usual receps/lights in common areas
thanks,
RE: Diversity Factor on Distribution Panel
respectfully
RE: Diversity Factor on Distribution Panel
For quick "sanity checks", I have seen the following demand factors used. Note that these factors should only be used to check the results of a thorough design completed by a competent professional engineer:
Industrial - 0.8
Commercial - 0.6
Thus, if you have an commercial application with 3500A of 120/208VAC, 3-Phase, 4-Wire loads connected, it would be common to see a 2000A panel specified.
RE: Diversity Factor on Distribution Panel