| 361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
| 600 | DF | HOUSING OR MOUNTING ASSEMBLIES WITH DIVERSE ELECTRICAL COMPONENTS {11} |
| 601 | DF | .~ For electrical power distribution systems and devices {10} |
| 602 | DF | .~.~ Distribution station (i.e., substation) {2} |
| 604 | ![]() | .~.~.~ Gas insulated |