| 174 / | HD | ELECTRICITY: CONDUCTORS AND INSULATORS |
| 50 | DF | BOXES AND HOUSINGS {4} |
| 52.1 | DF | .~ With electric device or mounting means therefor {5} |
| 61 | DF | .~.~ Fixtures coupling or mounting means {1} |
| 62 | | .~.~.~ Stud or nipple {2} |
| 63 | DF | .~.~.~.~> With box supporting means |
| 64 | DF | .~.~.~.~> With conduit or cable coupling means |