| 174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS |
| 68.1 | DF | CONDUITS, CABLES OR CONDUCTORS {15} |
| 126.1 | ![]() | .~ Conductor structure (nonsuperconductive) {6} |
| 126.2 | DF | .~.~> Composite |
| 126.3 | DF | .~.~> Corrugated or slotted |
| 126.4 | DF | .~.~> Metal coated on insulation |
| 127 | DF | .~.~> Corona prevention |
| 128.1 | DF | .~.~> Plural strand {3} |
| 133 R | DF | .~.~> Noncircular strand section {1} |