range calculations

[elecmen]

Hi, I do mostly residential so I need a hand with this calculation. Light commercial place of assembly with kitchen. They are removing gas stove and installing 2 residential type ranges in its place. How do you calculate the load for 2 ranges? This building has a 200A 120/240V 1 phase service. Any help would be appreciated. Thanks

 

[Sierrasparky]

Is this a lunch kitchen or a comercial kitchen used all day.
IF it's just for lunch I would argue to use the standard calcs for a kitchen range/oven.
If it is used for production I would treat it like any other electric device.

 

[cadpoint]

It is what it is, in the index there's oven's and there are ranges, and ranges have a bigger listing of terms and both even over lap but are not all the same as listed in the index.

I doesn't matter what the use of, or limit of, the use of this one "thing", it is what it is, and should be sized accordingly!

 

[kbsparky]

The problem with such installations is 99% of the time, those ranges are not in use. During the remaining 1%, it is most likely that they will be both on to the max, along with everything else in the building (HVAC, lights, other kitchen stuff like coffee pots, etc) for a crowded church social function.

That's why they need 2 of `em.

Usual demand factors may not be enough capacity here.

So, plan accordingly and calculate for the worst-case scenario. In the end, you'll be glad you did `cause everything will operate fine without the main(s) tripping out.

 

[Dennis Alwon]

Look at Table 220.56 for other than dwelling kitchen equipment

Table 220.56 Demand Factors for Kitchen Equipment — Other Than Dwelling Unit(s)

Number of Units of Equipment ---- Demand Factor (%)
1---- 100%
2---- 100%
3---- 90%
4---- 80%
5---- 70%
6 and over 65%