I want to know the demand factor that a I can use in the calculation of 15 water heaters placed in different commercial spaces at a commercial place. This commercial places has the dimensions of 10' x 12' that will be used for cafeterias, souveniers, sale of books, sale of cellular accesories, etc. Each of these 15 commercial unit has a water heater but at this moment the final purpose of each unit is unknown. We don't know how many cafeterias will be or how many shoe store will be...I did not find anything related with this in the NEC, Please let me know the demand factor that I can use. Thanks
Demand factor for 16 water heater
- Thread starter johnnyboy
- Start date
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- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
65%. Table 220.56.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Is a water heater for an undeclared space "kitchen equipment"? :-?
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
The phrase "water heaters" is one of the things mentioned in 220.56. That is all it takes, in my opinion, to allow us to apply the demand factor.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
Charlie, with so brief a reply, how am I supposed to pick it apart? 
Here is my attempt: What if the water heaters were installed to serve motel rooms with bathtubs, but no kitchens?
Here is my attempt: What if the water heaters were installed to serve motel rooms with bathtubs, but no kitchens?
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Not relevant to the original question, wouldn?t you say George? :grin:
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
LMAO
Without knowing what the finished occupancies will be, it's not entirely irrelevant. Humor me.
Without knowing what the finished occupancies will be, it's not entirely irrelevant. Humor me.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
OK, I’ll humor you. I’ll restate my opinion that the simple fact that an article with “kitchen” in its title has a list, coupled with the fact that list includes water heaters, tells me that you get to apply the demand factors to the load associated with water heaters. I don’t need to know if any hot water will make its way into a kitchen sink, or a dishwasher. It would not matter if an Inspector traced out the pipes and discovered that they only led to a bathtub. It’s on the list; the demand factors apply.
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
So essentially, you're saying that the fact that the section is titled "kitchen equipment" and the water heater is mentioned without any sort of limiting statement, that the writers of Article 220 consider all water heaters kitchen equipment? It's just part of the gang by association?
Actually, I'll buy that.
Thus concludes the argument for Thursday. Once again, Charlie wins.
Actually, I'll buy that.
Thus concludes the argument for Thursday. Once again, Charlie wins.
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