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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.

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