CBP expects the declared output to match the manufacturer's nameplate rating, typically expressed in KVA for alternators. Technical datasheets, test certificates, or manufacturer declarations are the standard supporting documents. For units near the 75 KVA boundary, importers should obtain documentation that clearly states the rated continuous output, as the distinction between headings 850161 and 850162 turns entirely on this figure.

Not necessarily. A complete generator set — comprising an engine and an alternator mounted together — is generally classified as a generating set under heading 8502 rather than as a standalone alternator under 8501. The 8501 heading applies when the alternator is imported separately, without the prime mover. Importers should assess whether the shipment constitutes a complete generating set or a standalone component before declaring classification.