# WireRef

> NEC electrical wire reference for electricians and homeowners. 516+ pages of wire sizing, ampacity, GFCI/AFCI requirements, grounding, conduit fill, and state-by-state NEC adoption data. All data sourced from NEC 2023 (NFPA 70) with NEC 2026 updates noted.

## Ampacity Tables
- [Wire Ampacity Charts (All Gauges)](https://wireref.com/ampacity/): NEC Table 310.16 ampacity for every copper and aluminum wire size, THHN, NM-B, and XHHW-2. Includes 60/75/90C columns, derating chains, and voltage drop.
- [Ampacity Calculator](https://wireref.com/tools/ampacity-calculator/): Interactive tool applying 110.14(C) termination limits, temperature correction, and bundling adjustment.

## Wire Sizing
- [Wire Size by Amperage](https://wireref.com/wire-size/): Pre-computed wire size for every standard breaker rating (15A-600A) with max distance tables.
- [Voltage Drop Calculator](https://wireref.com/tools/voltage-drop-calculator/): Calculate voltage drop by wire size, distance, and load.

## GFCI/AFCI Requirements
- [GFCI Requirements by Room](https://wireref.com/gfci/): Room-by-room GFCI and AFCI requirements per NEC 2023, with code timelines and inspection notes.

## Grounding
- [Ground Wire Sizing](https://wireref.com/grounding/): Equipment grounding conductor (EGC) size per NEC Table 250.122 for every breaker rating.

## Conduit Fill
- [Conduit Fill Calculator](https://wireref.com/tools/conduit-fill-calculator/): NEC Chapter 9 conduit fill for EMT, PVC, RMC, IMC. Mixed conductor support.
- [Conduit Fill Tables](https://wireref.com/conduit-fill/): Pre-computed fill tables by conduit type and wire gauge.

## Breaker Sizing
- [Breaker Wire Size Guides](https://wireref.com/breaker/): Wire size, uses, and requirements for standard breaker ratings.

## NEC Code Reference
- [NEC Article Guides](https://wireref.com/nec/): Practical interpretation of key NEC articles (210, 220, 230, 240, 250, 300, 310, 334, 625, 680).

## State NEC Adoption
- [NEC by State](https://wireref.com/states/): Which NEC edition each US state enforces, licensing requirements, permit costs, and city-specific data for all 50 states.

## Project Wiring Guides
- [Project Guides](https://wireref.com/projects/): Complete wiring specs for 34 common residential projects (EV charger, kitchen remodel, hot tub, pool pump, etc.).

## Appliance Circuits
- [Appliance Wiring](https://wireref.com/appliance/): Wire size, breaker, and circuit requirements for 62 residential appliances.

## Wire Types
- [Wire Insulation Types](https://wireref.com/wire-types/): NM-B, THHN, UF-B, XHHW-2, USE-2 and 20+ other types with permitted uses and ampacity.

## Tools
- [Panel Load Calculator](https://wireref.com/tools/panel-load-calculator/): NEC Article 220 dwelling unit load calculation.
- [Inspection Checklist](https://wireref.com/tools/inspection-checklist/): Pre-inspection preparation tool.
- [License Reciprocity Explorer](https://wireref.com/tools/license-reciprocity/): Electrician license reciprocity between US states.