| 174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS |
| 68.1 | DF | CONDUITS, CABLES OR CONDUCTORS {15} |
| 250 | DF | .~ Preformed panel circuit arrangement (e.g., printed circuit) {9} |
| 261 | ![]() | .~.~ With particular conductive connection (e.g., crossover) {2} |
| 262 | DF | .~.~.~> Feedthrough {3} |
| 267 | DF | .~.~.~> Termination post |