titan1021
Senior Member
- Location
- Northern California
I recently upgraded a commercial service from 100amp 120/208Y to 200amp 120/208Y, and also replace the 100amp sub-panel the service feeds with a new 200amp sub-panel. The building has a 1200amp main service coming in that serves (17) metered apartment units and (5) separately metered commercial spaces.
All (22) of the existing services have main breakers rated at 10k, as is the upgraded service and sub-panel I installed.
The inspector comes out for the final inspection and says that he wants me to get a letter from the utility provider stating the AIC rating of the service. The utility provider comes back with a rating of approximately 42k, now according to the inspector I will have to change both of the main breakers I installed to 42k breakers. I believe that I should only have to change the main breaker at the service to 42k, but not the sub-panel's main. I couldn't find a particular code section that stated that specifically, just wondering if I am on the right track.
Thanks
All (22) of the existing services have main breakers rated at 10k, as is the upgraded service and sub-panel I installed.
The inspector comes out for the final inspection and says that he wants me to get a letter from the utility provider stating the AIC rating of the service. The utility provider comes back with a rating of approximately 42k, now according to the inspector I will have to change both of the main breakers I installed to 42k breakers. I believe that I should only have to change the main breaker at the service to 42k, but not the sub-panel's main. I couldn't find a particular code section that stated that specifically, just wondering if I am on the right track.
Thanks