Table 220.55

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Section/Paragraph: Table 220.55

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Table 220.55 Demand Factors and Loads for Household Electric Ranges, Wall-Mounted Ovens, Counter-Mounted Cooking Units, and Other Household Cooking Appliances over 13/4 kW Rating
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Notes:
1. Over 12 kW through 27 kW ranges all of same rating. For ranges individually rated more than 12 kW but not more than 27 kW, the maximum demand in Column C shall be increased 5 percent for each additional kilowatt of rating or major fraction thereof by which the rating of individual ranges exceeds 12 kW.
2. 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.
Substantiation:

"thereof" is an archaic term which is considered to reduce clarity according to NEC_StyleManual_2011.pdf 3.3.4.

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[Smart $]

While the term may be archaic, its use has/had a purpose... namely denoting the subject is that which immediately precedes it and to reduce repetition of the same descriptive text, especially when greater than a single word.

By removing thereof without substituting another connection to the subject, you create an ambiguity. Kilowatt is a unit of measure. Major fraction describes the property of a unit (or value) and notates no particular measure.

JMO

https://www.google.com/webhp?source...&ie=UTF-8#q=alternatives for the word thereof