Create Electrical Demand Factor

[ebsoares]

Hi, all.

Trying to create a residential general lighting and small appliance demand factor (Revit > Manage tab > MEP Settings > Load Classifications > Demand factor "..." button), per NEC table 220.42 (dwelling units), which is similar to what Revit already has for general receptacles - we need the first 3,000VA to be demanded at 100%, from there up to 120,000VA to be demanded at 35%, and from there upwards to be demanded at 25%.

Problem:

1. If we use anything below 1000VA (so, 3 digits or less), there is no problem. Here I type "999" (on yellow field), hit enter, and it works fine:
   

   

2. If I type anything above 999 (like 3000) it does not allow me to hit enter, or tab, or anything - it just won't take anything I've tried and the only option after that is to hit "Cancel":
   1. Typing "3000" and hitting enter does nothing (no warnings or anything), the cursor just remains in that field and I can't get out of it;
   2. Typing "3,000" (added comma) and hitting enter gives me the warning "Enter a value or a formula starting with "=""
   3. Typing "=3,000" (added "=" sign) and hitting enter gives me the warning "Comma not expected"
   4. Typing "=3000" (removed comma) and hitting enter does nothing again, the cursor just remains in that field and I can't get out of it
   5. Adding "VA" to any of the above will have the same crazy results

If you have come across this and found a way to get it to work, would you please let me know?

Thanks in advance!

[ebsoares · Accepted solution]

Alrighty - found the problem (it's ridiculous):

It was the digital grouping! That is the setting that uses commas to separate thousands, like 3,000 vs 3000. 🙄

Went to Revit > Manage tab > Project Units > changed discipline to Electrical > Apparent Power > toggled off "Use digital grouping"

Now we can type any value above 999 that we want for the demand factor. After making the changes we can just go back to project units and reset the digital grouping.

Thanks to anyone if you were trying to help out - hope this solution can help others👍