361 / | HD | ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES |
1 | DF | SAFETY AND PROTECTION OF SYSTEMS AND DEVICES {32} |
117 | DF | .~ High voltage dissipation (e.g., lightning arrester) {10} |
124 | DF | .~.~ Thermal (e.g., fusible, bimetallic) {1} |
125 | .~.~.~ With cutout (e.g., blowout type) |