Volt/Amperes
- Thread starter Fred L.
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- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
If you want whole numbers, you need to turn your fraction upside down, and talk of VA per square foot. Even so, this cannot be answered in general terms. A building?s average value of VA per square foot varies widely with the type of building. I am currently working on a large lab that will run about 15 VA/ft2. Other types of building will run two or three times that value.
What, specifically, are you looking for?
What, specifically, are you looking for?
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
Fred L. said:
For calculation purposes on a residence you would figure 3 watts/sq.foot. Table 220.12 of the NEC will give you a list of many occupancies and the VA per sq. ft.
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
That only covers general lighting and a few specific receptacles. When you add in the electric range, the electric dryer, the electric heat, and the dishwasher, the total watts per square foot value starts going up significantly. If for example you had a 1200 square foot residence that calculated out to a service of 100 amps, that would equate to 20 watts per square foot.Dennis Alwon said:
- Location
- Chapel Hill, NC
- Occupation
- Retired Electrical Contractor
I realize that Charlie. I was trying to guess at what the OP was asking and thought maybe that's where he was heading.
Thanks for the quick responses. This was a testing question I encountered awhile back that seemed to me to be extremely vague and unanswerable since no specifics were given, just in general, and the possible choices were all 3 digit numbers. I was curious if someone had seen something in the code I'd missed. Thanks again for your help.
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