NEC Commercial Load Calculations

[@MarcMeeuwissen]

solid overview. Not too much info and not too little. Thank you!

[@CIRIHawaiiLLC]

You're a godsend. For step 7, if there are multiple motors, are we doing like the kitchen equipment, adding the total nameplate VA and adding 25% to that sum for the largest motor value?

[@Knowonespecial2U]

Is there anyway I could get an email copy of your flow sheet? Great information thank you

[@kamleshsharma6226]

Thank you for this, it's going to give me an easy way to learn. Can you make a video for the transformer size calculation?

[@electrical1019]

Hi Kamlesh, we will be making a series of new videos over the summer and will make sure to include one on transformers!

[@kamleshsharma6226]

Thank You Should the load of a 220.14(H) multi-assembly outlet be included in the total VA load, or is it already factored into the calculations of 220.14(I) or 220.14(K)? @@electrical1019

[@cliftonelectricllc2663]

That's a great video it did help me a lot to understand what year book are you using? thank you

[@JR-zm6nx]

Thanks for the video! Do we have to add an extra 25% (continuous load) for show window, track, and sign/outline lighting? Or is that figured into the respective factors? I see it done differently by different folks, and I can't find it clearly explained in the code. Thanks!

[@electrical1019]

In the context of sizing your service, you are only required to include the load amounts specified in article 220. When it comes to sizing the branch circuits for those specific outlets, then the 125% for continuous load would come into play. Hope that helps!

[@icevariable9600]

I'm looking at Table 220.42 in 2020 NEC, nowhere in the text or Table does it mention "hospital". Only "Hotels, motels, including apartment houses without provision for cooking by tenants*, Warehouses (storage)."

[@Johamo]

For receptacles if total count is not know, why do you add it to the light demand adjustment? Isn’t lighting already calculated in step 1?

[@fredpalomares7277]

So, if there’s reach-in coolers how would the units used for refrigeration be added in this calculations.

[@electrical1019]

That would depend on the wiring method of the cooler. If the cooler simply uses a cord and plug attachment into a receptacle outlet, then you would simply add the 180VA of that outlet to the calculation. If this is a large cooler requiring a dedicated circuit/outlet, however, you would go by 220.14(A) which requires the ampere rating of the appliance to be used in calculating the required load. Hope that helps!

[@gregadventures2024]

How would you decide for a church building , say 8000 sq ft?

[@pepe8490]

What is the size for the neutral for this service?

[@derricksax8836]

Question, for office receptacles, if you use the 1 va per square foot Do you still use chart 220.44 for demand factors or is it 1va?! With no option for a 50 percent derate after first 10kva

[@pepe8490]

You can only use that for banks and office building. and no you cant use that table. only for receptacle demand factor.

[@icevariable9600]

At 5:50 you say "If you don't know how many receptacles are going to be installed, you do 1 VA additional to Table 220.12, so instead of offices being 1.3 VA, if you don't know the amount of receptacles, you just go 2.3 VA. You add 1 VA/sqft." So, where in the code does it say to add 1 VA to Table 220.12? 2020 NEC 220.14(K) states "In office buildings, the receptacle loads shall be calculated to be the larger of (1) or (2): 1) The calculated load from 220.14(I) after all demand factors have been applied 2) 1 VA/sqft If anything, this is in conflict with Table 220.12. Regardless, it doesn't say to add 1 VA to the VA in Table 220.12.

[@jessieryan-pv8ph]

Check out .14K, that is where it says to add that for receptacles.

[@maosongli4107]

1500 SQ feet unoccupied store for future, how to calculate the service load? also, how to calculate the receptacle load (no receptacles installed yet)

[@electrical1019]

As far as the code is concerned, you are only required to calculate based on the current load of the building. So if there is no equipment, receptacles, etc. in the building, they would not be included in the calculation. Otherwise you would simply follow the steps in this video for what loads you do have. Hope that helps!

[@marcostorres9256]

does anyone know if he has those papers on PDF form

[@kailashsoni3576]

Do u have any excel sheet