Range Calculation

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resistance

resistance

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Ok, I've never ran into this problem, so I'm as rusty as a 90 year old nail.
Here's the situation:
Single family home that added an additional kitchen with cooking range, for a finished daylight basement.
My question. How do we handle the range in a DLC.

here is how I handled it based on T.220.55 (Note 2).

Range 1=10KW
Range 2=9.3kw

Note 2 says: Over 8? kW through 27 kW ranges of unequal ratings. For ranges individually rated more than 8? kW and of different ratings, but none exceeding 27 kW, an average value of rating shall be calculated by adding together the ratings of all ranges to obtain the total connected load (using 12 kW for any range rated less than 12 kW) and dividing by the total number of ranges. Then the maximum demand in Column C shall be increased 5 percent for each kilowatt or major fraction thereof by which this average value exceeds 12 kW.

Based on the above highlighted:
Range 1 now=12KW
Range 2 now= 12KW
12(2)=24KW
24KW/2=12KW
Max demand=12KW
I'm I reading this right?
 
resistance said:
Ok, I've never ran into this problem, so I'm as rusty as a 90 year old nail.
Here's the situation:
Single family home that added an additional kitchen with cooking range, for a finished daylight basement.
My question. How do we handle the range in a DLC.

here is how I handled it based on T.220.55 (Note 2).

Range 1=10KW
Range 2=9.3kw

Note 2 says: Over 8? kW through 27 kW ranges of unequal ratings. For ranges individually rated more than 8? kW and of different ratings, but none exceeding 27 kW, an average value of rating shall be calculated by adding together the ratings of all ranges to obtain the total connected load (using 12 kW for any range rated less than 12 kW) and dividing by the total number of ranges. Then the maximum demand in Column C shall be increased 5 percent for each kilowatt or major fraction thereof by which this average value exceeds 12 kW.

Based on the above highlighted:
Range 1 now=12KW
Range 2 now= 12KW
12(2)=24KW
24KW/2=12KW
Max demand=12KW
I'm I reading this right?
Click to expand...

Based upon those calculations, any number of 12kW ranges would = 12kW total.

Example:

5 ranges, all 12kW.
12(5)=60kW
60kW/5=12kW
Max demand = 12kW???

:confused:
 
resistance said:
Ok, I've never ran into this problem, so I'm as rusty as a 90 year old nail.
Here's the situation:
Single family home that added an additional kitchen with cooking range, for a finished daylight basement.
My question. How do we handle the range in a DLC.

here is how I handled it based on T.220.55 (Note 2).

Range 1=10KW
Range 2=9.3kw

Note 2 says: Over 8? kW through 27 kW ranges of unequal ratings. For ranges individually rated more than 8? kW and of different ratings, but none exceeding 27 kW, an average value of rating shall be calculated by adding together the ratings of all ranges to obtain the total connected load (using 12 kW for any range rated less than 12 kW) and dividing by the total number of ranges. Then the maximum demand in Column C shall be increased 5 percent for each kilowatt or major fraction thereof by which this average value exceeds 12 kW.

Based on the above highlighted:
Range 1 now=12KW
Range 2 now= 12KW
12(2)=24KW
24KW/2=12KW
Max demand=12KW
I'm I reading this right?
Click to expand...

Your average is correct; 12 KW. 12 KW exceeds 12 KW by 0 KW - so you don't need to adjust the max demand found in table 220.55. For two appliances, the demand per the table is 11 KW.
 
Last edited:
I think the idea is that when you start getting all sorts of different sized stuff, especially appliances over 12 KW, then your average will begin to skew upwards and you will have to incrementally increase the Column C demand accordingly.
 
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