Mike Dolt Enterprises
Mike Dolt Enterprises
User: fandi, Location: Los Angeles
Asked on: Thursday, May 27, 2021 at 5:46 pm EDT
Answered on: Thursday, June 20, 2024 at 10:52 am EDT
Question: Hello All,There are two separate buildings with no common walls:Building A has 2 residential units (units #1, #2). Building B has 2 residential units (units #3, #4). Currently the main service panel and all the subpanels for the four units are at building A. This means there are currently multiple branch circuits from building A going to unit #3 and #4 of building B.Now the changes:- The main service panel is being upgraded with a new location outside building A.- The subpanels of the four units first were planned to be upgraded but because of section 225.30 (assuming the exceptions of this section can't be used), only units #1 & #2 are upgraded. The subpanels of units #3 & #4 are not being touched so they're grand-fathered in. Only the feeders from the new main service panel to the existing subpanels #3 & #4 are upgraded.My question: Is 225.30 still violated with the above proposal/changes? (again assuming the project does not qualify to the exceptions of this section).Thank you.
Yes, 225.30 is still violated with the proposed changes.Section 225.30 - Overcurrent Protection states that:"Overcurrent protection shall not be provided for more than one building or structure from a single service equipment."The proposed changes still violate this requirement because: The new main service panel is located outside of Building A. The subpanels for Units #3 and #4 are still being supplied from the main service panel in Building A.This means that multiple buildings (Building A and Building B) are being protected by a single overcurrent protective device (OCPD) at the new main service panel.
Exceptions to Section 225.30 do not apply in this case: Exception 1 (Outdoor Lighting)
This exception does not apply because the subpanels in Building B are not for outdoor lighting.
Exception 2 (Single-Occupancy Buildings)
This exception does not apply because Buildings A and B are separate buildings with different occupants.Therefore, the proposed changes
violate Section 225.30, and a separate main service panel must be installed for Building B. Flag for review