8535.30.00 - Isolating switches and make-and-break switches

This HTS category, 8535.30.00, encompasses isolating switches and make-and-break switches designed for electrical circuits. These devices are crucial for safely controlling the flow of electricity by either completely disconnecting a circuit (isolating switches) or by intentionally opening and closing the circuit (make-and-break switches). Their primary function is to interrupt or establish electrical connections, often under no-load or light-load conditions, to ensure operational safety or to facilitate maintenance.

Distinguishing this category from its siblings, 8535.10.00 (fuses) are devices designed for overcurrent protection and are typically sacrificial, 8535.40.00.00 covers surge protection devices like lightning arresters, and the "Other" category 8535.90 is a residual category for electrical apparatus falling under 8535 not otherwise specified. Isolating and make-and-break switches are distinct due to their manual or mechanical operation for intended circuit control, rather than automatic protective functions or surge mitigation.

Within this classification, further subdivision is provided by subcategories 8535.30.00.40 for "Knife" switches and 8535.30.00.80 for "Other" types. The "Knife" designation refers to a specific design where a movable blade makes contact with fixed terminals, a common and recognizable form of isolating switch. The "Other" subcategory captures all other designs of isolating and make-and-break switches that do not fit the "knife" configuration, ensuring comprehensive coverage for this functional group of electrical switching apparatus.