Just food for thought here.

If the 2" contains the IMSA cable for a municipal fire protective circuit it is not likely to be subject to the NEC.

If that 2" does run to a master box my guess would be that the 1/2" contains the grounding electrode conductor for the master box.


I think we can safely assume no electrician was consulted when someone decided to infill the area with concrete.

Bob Badger
Construction & Maintenance Electrician
Massachusetts