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Anonymous Poster #1

# Demand Factor and Coincidence Factor?

01/08/2018 3:54 PM

demand factor and coincidence factor

are they the same word?

I am reading a book on low voltage design and the author uses them interchangeably.

Are they technically the same?

Thanks

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Guru

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4276
#1

### Re: demand factor and coincidence factor ?

01/08/2018 4:58 PM

“Are they technically the same?”

Not really, one is the is the incidental sum of the other.

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Anonymous Poster #1
#3

### Re: demand factor and coincidence factor ?

01/08/2018 6:11 PM

can you please explain a bit more on what you mean by incidental sum

thanks

Guru

Join Date: Mar 2007
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#2

### Re: demand factor and coincidence factor ?

01/08/2018 5:16 PM

..."In telecommunication, electronics and the electrical power industry, the term demand factor is used to refer to the fractional amount of some quantity being used relative to the maximum amount that could be used by the same system. The demand factor is always less than or equal to one. As the amount of demand is a time dependent quantity so is the demand factor."...

..."coincidence factor. the ratio, expressed as a numerical value or as a percentage, of the simultaneous maximum demand of a group of electrical appliances or consumers within a specified period, to the sum of their individual maximum demands within the same period."....

https://en.wikipedia.org/wiki/Demand_factor

https://en.wikipedia.org/wiki/Diversity_factor#Coincidence_factor

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Guru

Join Date: Mar 2011
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#4

### Re: Demand Factor and Coincidence Factor?

01/09/2018 11:31 AM

I am not sure what you are demanding, but it appears to be a complete coincidence to me the factor ≠1 over the space and time involved.

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Guru

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#5

### Re: Demand Factor and Coincidence Factor?

01/09/2018 5:54 PM

Qualitatively speaking, rich question, poor author...

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