Measure, cut, and bend wire and conduit, using measuring instruments and hand tools. Trace out short circuits in wiring, using test meter. Strip insulation from wire ends, using wire stripping pliers, and attach wires to terminals for subsequent soldering. Examine electrical units for loose connections and broken insulation and tighten connections, using hand tools. Construct controllers and panels, using power drills, drill presses, taps, saws, and punches. Drill holes and pull or push wiring through openings, using hand and power tools. Clean work area and wash parts. Maintain tools, vehicles, and equipment and keep parts and supplies in order. Transport tools, materials, equipment, and supplies to work site by hand, handtruck, or heavy, motorized truck. Install copper-clad ground rods, using a manual post driver. Thread conduit ends, connect couplings, and fabricate and secure conduit support brackets, using hand tools. Disassemble defective electrical equipment, replace defective or worn parts, and reassemble equipment, using hand tools. Erect electrical system components and barricades, and rig scaffolds, hoists, and shoring. Perform semi-skilled and unskilled laboring duties related to the installation, maintenance and repair of a wide variety of electrical systems and equipment. Dig trenches or holes for installation of conduit or supports. Raise, lower, or position equipment, tools, and materials, using hoist, hand line, or block and tackle. Break up concrete, using airhammer, to facilitate installation, construction, or repair of equipment.