I'm working on a show room with numerous Kitchen and house hold appliances stoves, ovens,ranges, washers and dryers on display. All the appliances are for residential use. The appliances are going to be functional for demonstration purposes. According to the NEC how is such a load diversified?
House hold Appliance showroom
- Thread starter Geon_W
- Start date
- Status
- Location
- Windsor, CO NEC: 2017
- Occupation
- Hospital Master Electrician
I would say it isn't, but I am not an engineer. 
I would say they are definutely not continuous, but I do not see how you could claim load diversity in this situation.
I would say they are definutely not continuous, but I do not see how you could claim load diversity in this situation.
mdshunk
Senior Member
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- Right here.
Do they intend to actually cook in them? Or just have them light up for demonstration purpose, so the screens and buttons come alive?
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
The appliances may be intended for residences, but the show room is not a dwelling unit by itself. Therefore, 220.23, as an example, would not apply. But 220.55 (cooking equipment) can be used. So too could 220.44 (non-dwelling unit receptacles), if the show room has more than 56 receptacles (i.e., 10KVA divided by 180VA). This may be one for you to work out with the AHJ. My view is that it is certainly possible for everything to be running at the same time, but it is so unlikely that a lower load should be allowed to be used.
I'm doing one now as a renovation to an existing building, and most of the "display" appliances only have a small 120V circuit for the light and any controls.....no compressors, heating elements will be connected. So I guess they are semi-functional.
There is a small demostration kitchen that will have normal functional applicances for cooking, cooling etc. I'm just adding up the loads....no big deal considering the size of the existing service. Here, we are required to have hood suppression systems added to the residential hoods over the cooktops because it's installed in a commercial building.
There is a small demostration kitchen that will have normal functional applicances for cooking, cooling etc. I'm just adding up the loads....no big deal considering the size of the existing service. Here, we are required to have hood suppression systems added to the residential hoods over the cooktops because it's installed in a commercial building.
mdshunk
Senior Member
- Location
- Right here.
Wow... If you're around when the job is finished up, that would be something to take a picture of and share.Dave_PE said:
e57
Senior Member
- Location
- San Francisco, CA
Worked in showrooms fairly solid for roughly 5 years with a former employer - they rarely ever hooked any up or made any operational. Too much liability - some kid walks in and starts messing with everything out of boredom... Or turns all the ovens on burns his hand, or jambs his hand in a blender or something... For that matter adults too...
For that matter adults too...necnotevenclose
Senior Member
While you may apply the diversity factor that was mentioned, how many of the appliances will be used during a demonstration? If you are told just (1) appliance at a time, I would suggest providing a design that was done around worst case. In the long run if they decide to have multiple demonstrations there may be limited work that may need to be done to cover the owners needs.
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