Electrical Wiring Disc Calculator from Canada
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.
Duty Rate — Canada → United States
13.9%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Reference to NEC codes supports professional instrument status
• UL listing optional but aids customs clearance
• Avoid residential DIY marketing that suggests toy classification