NEC 2026 Wire Gauge & Voltage Drop Calculator
Conductor ampacity sizing and branch circuit voltage drop compliance with inspector-ready NEC citations.
NEC 2026 Trade Sizing Engine
Wire Gauge & Voltage Drop Calculator
Conductor ampacity Table 310.16 & branch circuit voltage drop compliance.
Recommended Conductor
12 AWG
Copper (75°C Insulation)
Voltage Drop
3.16V (2.6%)
PASS (<= 3% NEC Standard)
Conduit & Code References
1/2" EMT Conduit
NEC Table 310.16 (Copper 75C), NEC 210.19(A) Voltage Drop, NEC Chapter 9 Table 1 Conduit Fill
Branch Circuit Wire Sizing Directory
Explore NEC 2026 ampacity, wire gauge, and voltage drop compliance reports for common residential circuits.
15A 120V Circuit
15A 120V Lighting & Receptacle Circuit
20A 120V Circuit
20A 120V Small Appliance & Kitchen Circuit
30A 240V Circuit
30A 240V Electric Clothes Dryer / RV Circuit
50A 240V Circuit
50A 240V Electric Range & Level 2 EV Charger
100A 240V Circuit
100A 240V Residential Subpanel Feed
200A 240V Circuit
200A 240V Main Service Electrical Panel