mshields
Senior Member
- Location
- Boston, MA
I've encountered a building inspector who thinks the branch circuit feeding battery packs used in a medical office building needs to be 2 hour rated. This is obviously wrong but I want to make sure I use the most compelling argument to parry this thrust.
A. Assuming I correct to call the conduit and wire going to the battery pack, a branch circuit, branch circuits are not required to be 2 hour rated.
B. The batteries are the EESS
C. This MOB has a generator which it uses at their discretion but which is set up for OS loads only. It's presence in my mind is immaterial so long as the egress paths are protected with 90 minute battery packs. But we do MOB's all the time that don't have generators and therefore don't have any 2 hour rated feeders.
Regardless, I feel like perhaps I am missing a cu de gras code reference. Can anyone help
A. Assuming I correct to call the conduit and wire going to the battery pack, a branch circuit, branch circuits are not required to be 2 hour rated.
B. The batteries are the EESS
C. This MOB has a generator which it uses at their discretion but which is set up for OS loads only. It's presence in my mind is immaterial so long as the egress paths are protected with 90 minute battery packs. But we do MOB's all the time that don't have generators and therefore don't have any 2 hour rated feeders.
Regardless, I feel like perhaps I am missing a cu de gras code reference. Can anyone help