Keywords: Boxes (electric); Electric cable systems; Electric conduits; Corrosion tests; Pipe fittings ; Pipe supports; Design; Dimensions; Mechanical testing; Threaded components; Dimensional measurement; Gauges; Linear density; Ring gauges ; Plug gauges; Electric wiring systems; Gap gauges ; Thread gauges; Bend couplings; Junction boxes ; Pipe tees; Elbows (pipes)