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NEC Code Explorer

Comprehensive NEC code analysis, compliance tools, and professional guidance for electrical contractors, engineers, and inspectors

Most Popular Code Pages

NEC 210.12

Arc-Fault Circuit Interrupters (AFCIs)

NEC code requirements and compliance guidance

2023 NEC
NEC 210.52

Dwelling Unit Receptacle Outlets - Kitchen, Island & Outlet Spacing

kitchen outlet code, kitchen island outlet, outlet spacing code

2023 NEC
NEC 240.6

Standard Ampere Ratings - Breaker & Fuse Sizes Chart

standard breaker sizes, breaker sizes, standard fuse sizes

2023 NEC
NEC 250.122

Equipment Grounding Conductor Size Chart - Table 250.122

250.122, nec 250.122, 250.122 nec

2023 NEC
NEC 250.66

Grounding Electrode Conductor Size - Table 250.66

250.66, nec 250.66, nec table 250.66

2023 NEC
NEC 250

Grounding and Bonding - Complete Article 250 Guide

nec 250, nec article 250, what article is grounding covered in

2023 NEC

Article 210: Branch Circuits

Outlet spacing, kitchen requirements, AFCI protection, and branch circuit design

NEC 210.12
Arc-Fault Circuit Interrupters (AFCIs)
NEC 210.52
Dwelling Unit Receptacle Outlets - Kitchen, Island & Outlet Spacing
NEC 210.52-f
Laundry Circuit Requirements - NEC 210.52(F)
NEC 210.5
Branch Circuit Color Coding and Identification
NEC 210
Branch Circuits - Complete Article 210 Guide
NEC 210.5
Branch Circuit Color Coding and Identification - NEC 210.5

Article 240: Overcurrent Protection

Breaker sizes, fuse ratings, conductor protection, and overcurrent device requirements

NEC 240.6
Standard Ampere Ratings - Breaker & Fuse Sizes Chart
NEC 240.4
Protection of Conductors - Overcurrent Device Requirements
NEC 240.4-d
Small Conductor Protection - 240.4(D) Requirements
NEC 240
Overcurrent Protection - Complete Article 240 Guide

Article 250: Grounding and Bonding

Grounding conductor sizing, electrode requirements, and bonding specifications

NEC 250.122
Equipment Grounding Conductor Size Chart - Table 250.122
NEC 250.66
Grounding Electrode Conductor Size - Table 250.66
NEC 250
Grounding and Bonding - Complete Article 250 Guide

Article 314: Outlet, Device, Pull and Junction Boxes

Box fill calculations, junction box sizing, and installation requirements

NEC 314.16
Box Fill Calculations - Junction Box Size Requirements
NEC 314.16-b
Box Fill Calculations - Table 314.16(A) & 314.16(B)
NEC 314
Outlet, Device, Pull and Junction Boxes - Article 314
NEC 314.16-b
Box Fill Calculations - Table 314.16(A) & 314.16(B)

Calculators & Reference Tools

Interactive calculators, charts, and practical reference guides

BOX-FILL-CALCULATOR
Box Fill Calculator - 4x4 Junction Box Wire Capacity
GROUND-WIRE-CHART
NEC Ground Wire Size Chart - Complete Grounding Reference
KITCHEN-OUTLET-GUIDE
Kitchen Outlet Code Requirements - Counter & Island Placement
RECEPTACLE-SPACING-GUIDE
Receptacle Spacing Rules - 2', 6' & 12' Requirements
CONDUIT-FILL-CALCULATOR
Conduit Fill Calculator - Number of Conductors in Conduit
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