Customer has Primary power run from utility pole, under street (where it becomes customer responsibility) around side of building (aprox 700') where it enters outside switch. Cabling us direct burial CN wire. We need to replace said cabling. Thing is years ago owner added on to the building (25'x25') over top of the laterals. We cannot go around building with new cabling because of property boundary issues. Proposing to go under building with new laterals. I cannot find where NEC mentions any restrictions of this. Thought I would check here.
