lkdiaZ
Member
- Location
- Virgin Islands
- Occupation
- Electrical Contractor
I've looked through this forum but couldn't quite find an answer to the following.
Trying to get an idea of how electricians/engineers (PE) go about calculating the lighting loads to a sub panel. Lighting load is based on the higher of either 220.12 or the connected load x 1.25. Where I'm getting stuck is how do you apportion square footage to multiple subpanels?
The example application is a multistory office with main panel in first floor and multiple subpanels per floor. Do we figure out what rooms are circuited for lighting from each subpanel and then add up the square feet of each of these rooms and assign that area to each subpanel accordingly?
At the center of this question is how do we assign square footage to each of the multiple sub panels that are on the same floor so that we can correctly apply 220.12?
Trying to get an idea of how electricians/engineers (PE) go about calculating the lighting loads to a sub panel. Lighting load is based on the higher of either 220.12 or the connected load x 1.25. Where I'm getting stuck is how do you apportion square footage to multiple subpanels?
The example application is a multistory office with main panel in first floor and multiple subpanels per floor. Do we figure out what rooms are circuited for lighting from each subpanel and then add up the square feet of each of these rooms and assign that area to each subpanel accordingly?
At the center of this question is how do we assign square footage to each of the multiple sub panels that are on the same floor so that we can correctly apply 220.12?
