electrician installing electric cable wires and fuse switch box. multimeter in hands of electricians detail

ammeter assembling bay board box builder cable cabling check circuit commissioning construction control crew current detail electric electrical electrician electricians electricity enclosures engineer engineering equipment field fuse hands helmet industry inspect installation installing maintenance man mounting multimeter panel plug professional relay repairing repairman screwdriver services substation switch system technician unit voltage voltmeter wires wiring work worker