| 174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS | 
| 68.1 | DF | CONDUITS, CABLES OR CONDUCTORS {15} | 
| 126.1 | DF | .~ Conductor structure (nonsuperconductive) {6} | 
| 128.1 | DF | .~.~ Plural strand {3} | 
| 129 R | DF | .~.~.~ Assemblies of noncircular section {2} | 
| 129 B | ![]()  | .~.~.~.~ Bus bars |