Most current-carrying wiring devices — receptacles, switches, dimmers, and similar products — must be listed by a Nationally Recognized Testing Laboratory (NRTL) such as UL before they can be legally installed under the National Electrical Code. Importers should confirm that foreign-manufactured products carry valid NRTL certification for the specific US product standard, as certifications issued for other markets (e.g., CE marking) do not satisfy NEC requirements.

A broad range of wiring devices imported from China are subject to Section 301 tariffs. The applicable rate and list designation depend on the specific HTS classification of the device. Importers should verify the correct 10-digit HTS code for each product and check the USTR's Section 301 product lists, as exclusions and modifications have been issued periodically and the landscape continues to evolve.