NEC Demand Factor for Hotel Hairdryers & Coffee Makers

[rwilsond]

For a large existing hotel two new circuits will be added to each guest room to eliminate nuisance CB trips caused by too many coffee pots and hairdryers. These new circuits will feed only one receptacle each per room (one for a hairdryer & one for a coffee pot). New panels & transformers will be added to accommodate only these new circuits. Of course, overall, only a fraction of the coffee pots & hairdryers would operate simultaneously, at any given time (short of a vast conspiracy conducted by the quests). Using connected load data to size distribution equipment and feeders results in oversizing, simply to suit the NEC.

Is there anything such as a demand factor that could be applied to the panel, transformer, and feeder sizes that would be code-compliant?

 

[Senselessticker]

I believe what you really want to know is the diversity factor. Its my understanding that demand factor for a hair dryer or coffee pot should be unity (each will operate at full load if running). Determining the diversity factor is somewhat more art than science. The question you really need to answer is: What percentage of hairdryers/coffee pots will be running simultaneously. I don't think there is an NEC standard to follow to determine this, but I could be wrong. In my line of work, the client usually provides demand and diversity factors to us for their equipment, so I'm not experienced at determining each factor.