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anthony_s
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Join Date: Jun 2009
Posts: 5

Diversity Factor for Electrical Design

06/12/2009 4:14 AM

is there any international standard that can be used to derive diversity factor for continuous load, intermittent load and standby loads
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PWSlack
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#1

Re: diversity factor for electrical design

06/12/2009 6:03 AM

No. Diversity is installation-specific.

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sb
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#2

Re: diversity factor for electrical design

06/12/2009 6:15 AM

There is a NEC guide i think article 220 or so that talks about it, but in general terms as I remember. This is all by the experience of the power company.

check this for some idea

http://www.tpub.com/content/armyengineer/TM-5-811-1/TM-5-811-10013.htm

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msamad
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#3
In reply to #2

Re: diversity factor for electrical design

06/18/2009 5:00 PM

Diversity factor applies to the loads that are not run simultaneously (noncoincident loads). The NEC 220.60 applies in this case.

The NEC 220.60 states "Where it is unlikely that two or more noncoincident loads will be in use simultaneously, it shall be permissible to use only the largest load(s) that will be used at one time for calculating the total load of a feeder or service".

Depending on the continuous or intermittent nature of the load, you need to apply factor 1.25 or not.

- MS

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