Electrical Wiring Disc Calculator

Disc for electricians calculating wire gauge, voltage drop, conduit fill, and circuit loads. Mathematical instrument under HTS 9017.20.4000. Color-coded heavy plastic construction.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China3.9%+35.0%38.9%
🇲🇽Mexico3.9%+10.0%13.9%
🇨🇦Canada3.9%+10.0%13.9%
🇩🇪Germany3.9%+10.0%13.9%
🇯🇵Japan3.9%+10.0%13.9%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

8544.49.30Higher: 40.3% vs 38.9%

If electrical conductor accessories

Wiring-related equipment may classify with conductors.

9030.84.00.00Lower: 35% vs 38.9%

If includes actual electrical measuring

Voltage/current measuring instruments go to 9030.

8504.40.85.00Lower: 35% vs 38.9%

If sold with power supply components

Static converters with controls classify separately.

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

Import Tips & Compliance

Reference to NEC codes supports professional instrument status

UL listing optional but aids customs clearance

Avoid residential DIY marketing that suggests toy classification

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