largest motor load?

[Toros]

Why do we add .25% of largest motor load to the total demand load in service load cal,
It does not make sense to me, in huge demand load!!!!???

 

[topgone]

Why do we add .25% of largest motor load to the total demand load in service load cal,
It does not make sense to me, in huge demand load!!!!???

Why do you think it doesn't make sense? You should have seen what the largest motor does to your system whenever it is started!:happyno:

 

[mgookin]

Or if it locks!

 

[kwired]

Why do we add .25% of largest motor load to the total demand load in service load cal,
It does not make sense to me, in huge demand load!!!!???

Plus it is 25% not .25%. Big difference there.

 

[Smart $]

Why do we add [25%] of largest motor load to the total demand load in service load cal,
It does not make sense to me, in huge demand load!!!!???

Because the Code says we have to... :happyyes:

PS: we do not add the 25% to the total demand load... we include it in the total demand load.


The reason Code says we have to is not divulged in Code, but I surmise it is similar to the inclusion of an extra 25% for continuous loads, but dissimilar in that it is only applied to the largest motor, whether operated continuously or not.