Tables 220.42..and 220..44

[morg123452000]

Hello my question is when do I apply receptcale loads to table 220.42 in combination with the lighting load..example...a 80,000 sq ft warehouse..that has 80 recptacles..do I calculate the 20,000..with table 220.42...and the 14400va with the demands of table 220.44.or combine everything 20000 and 14400 under the demands of table 220.42..the code dosnt specify...help!

 

[augie47]

Hello my question is when do I apply receptcale loads to table 220.42 in combination with the lighting load..example...a 80,000 sq ft warehouse..that has 80 recptacles..do I calculate the 20,000..with table 220.42...and the 14400va with the demands of table 220.44.or combine everything 20000 and 14400 under the demands of table 220.42..the code dosnt specify...help!

don't blame the Code

If you look at 220.14(J) it tells you the receptacle load for dwelling units is included in 220.12

220.14(I) addresses receptacle outlets other than (J) & (K) and 220.44 shows the demand factors.

 

[morg123452000]

I'm reading it ir just keeps sending me in circles. .I'm still not sure how to calculate the receptacles in the warehouse...the way I read it I could use eather table

 

[morg123452000]

I did some research and answered my own question...figure it both ways and use the way that gives you the minimum ....any opinions?

 

[AlexJ2406]

Hello my question is when do I apply receptcale loads to table 220.42 in combination with the lighting load..example...a 80,000 sq ft warehouse..that has 80 recptacles..do I calculate the 20,000..with table 220.42...and the 14400va with the demands of table 220.44.or combine everything 20000 and 14400 under the demands of table 220.42..the code dosnt specify...help!

Are you asking, when you take the combined 34,400 and apply that to 220.42? If so, I don't think this is ever the right way to do it. I think the code is saying you can use table 220.42 "lighting demand factors" on the receptacle load you calculated, but you still have to keep them separate from your lighting load. so you would have 14400 and apply 12,500 @ 100% and the rest at 50% and then you would take the 20,000 lighting load and apply 12500 @ 100% and the rest at 50%.

The way you described it is how I do it though. Take the 20k from the lighting load with table 220.42 and the 14.4k receptacle load with table 220.44.

Hope this helps

 

[morg123452000]

Thanks for the answer...I beleave it's right too we both can't be wrong...lol

 

[Dennis Alwon]

As I understand it you can use either Table 220.42 or 220.44 for non dwelling receptacle loads. On a test I would probably use 220.44 for he receptacle load