| 337 / | HD | ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES |
| 14 | DF | ELECTROTHERMALLY ACTUATED SWITCHES {9} |
| 142 | DF | .~ Fusible element actuated {15} |
| 143 | DF | .~.~ With manual or other mechanical contact control means {8} |
| 145 | ![]() | .~.~.~ Multiple contact or plural circuit control means {1} |
| 146 | DF | .~.~.~.~> Multipole or polyphase |