220.55

[augie47]

To make sure I don't look more foolish in my class would someone else confirm the 220.55 calculated load for 14 cooking units, 6 @ 9-1/2 and 8 @ 18
(I came up with 33kw)

 

[luckylerado]

To make sure I don't look more foolish in my class would someone else confirm the 220.55 calculated load for 14 cooking units, 6 @ 9-1/2 and 8 @ 18
(I came up with 33kw)

I agree. 33.35

 

[Dennis Alwon]

Agreed. I think this is a good one to write out for some of the less experienced.

Assuming residential load as Gus directed us to T. 220.55 I cannot express the importance to reading these notes. Note 2 is what comes into play as the ranges are unequal ratings.

The note states to take any ranges less than 12kw for any range less than 12kw.
We have 6 - 6 x 12 kw = 72 kw
We have 8 @ 18 kw 8 x 18 kw= 144
The note states to add them together and divide by the number of ranges

144+72=216 kw divide by 14 = 15.43kw

15.43 exceeds the 12kw value by 3.43kw however the note allows us to round down if less than .5kw

So we take 3kw times .05 (5%) and we get .15

From Col C we see 29kw as our value for 14 range so multiply 29 * .15(from above) and we get 4.35
Add that to 29 kw and we get 33.35 kw

 

[augie47]

That is one tough Table to teach

 

[Little Bill]

That is one tough Table to teach,
to calculate as an installer,
& inspect as an inspector

I fixed it for you!