receptacle loads second question

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CAPTMIKE

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Texas
Second question as I think I may have answered my first about demanding the receptacle loads,I believe I can.But the real question is this,I am in Iraq and building 29 new buildings,each with a panel fed from a MDP.Now,as I calculate loads per buildings and apply demands,when it comes to calculating the main service size,do I use the already calculated amperages from the individual buildings,Or can I take the entire job as a whole,all the lighting,all of the outlets and put one demand on all of it at once,I am trying to get this as low as possible but do want it to work....Hope this makes sense..Thanks from Anbar province Iraq
 
Your answer is in Section 220.40 of the NEC. You are permitted to apply demands to the indivdiual branch circuits and feeders as applicable, and consider all demands of the entire system when considering the service.
 
Yes, you are allowed to apply the demand on the entire load as long as it is fed from one feeder or service as allowed in 220.40. Just remember, specific appliance loads must be calculated based on the ampere rating of the appliance and is not subject to the demand in tables 220.42 & 220.44.

Martin
 
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