Electric generating sets and rotary converters — HTS 8502

HTS heading 8502 is a broad product category for electric generating sets and rotary converters. It generally groups equipment that produces electrical power—such as an engine or other prime mover combined with an electric generator—as well as machines that convert electricity from one form to another using rotating machinery. The heading is about the equipment’s function, not merely whether a product contains a motor or is marketed as a power system.

To reach the correct 8-digit HTSUS subheading, start with the product’s technical identity and principal function, then follow the available subheadings under heading 8502. The breakdown commonly depends on the type of generating set or converter, including the kind of prime mover or generating technology, and sometimes other distinguishing specifications. Do not assume that “generator,” “power station,” or “converter” in a product listing determines classification; review the tariff text and relevant legal notes, and confirm the product’s actual construction and use.

What to check

• Identify whether the item is a complete generating set, a rotary converter, or a separate component; incomplete or parts shipments may classify differently.
• Record the equipment’s prime mover or generating technology, such as the engine or other source that drives generation, along with its technical specifications.
• Read every indented subheading under 8502 and compare the wording with the product’s actual design, rather than choosing by marketing name.
• Check whether the tariff requires a distinction based on type, capacity, or another specification, and use manufacturer documentation to support that distinction.
• Keep product drawings, datasheets, manuals, and an explanation of how the unit operates; ask a customs broker or seek a binding classification decision when the wording or product design is uncertain.