In certain wall structures it’s not always easy to know where drilling wont mess with wiring or plumbing too.
well yes, when i had my AC installed, they drilled into the conduit that had my wires inside. but they’re prepared for that sort of thing and stopped in time, so they only damaged the conduit, not the wires inside.
well yes, when i had my AC installed, they drilled into the conduit that had my wires inside. but they’re prepared for that sort of thing and stopped in time, so they only damaged the conduit, not the wires inside.