| 174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS | 
| 68.1 | DF | CONDUITS, CABLES OR CONDUCTORS {15} | 
| 110 R | DF | .~ Insulated {21} | 
| 120 R | DF | .~.~ Plural or impregnated layers {7} | 
| 122 R | ![]()  | .~.~.~ Fibrous or fabric {2} | 
| 122 G | DF | .~.~.~.~> Glass | 
| 122 C | DF | .~.~.~.~> Coated |