Table 310.15(B)(3)(a) — Adjustment Factors
Overview
When more than three current-carrying conductors are installed together in the same raceway, cable, or bundled group, their ability to dissipate heat decreases.
To prevent...
Table 310.16 — Ampacity of Conductors
Purpose
NEC Table 310.16 provides the allowable ampacity (current-carrying capacity) of insulated conductors rated 0 – 2000 volts.
It is one of the most used tables...
Article 215 – Feeders
Purpose
Article 215 of the National Electrical Code® (NEC®) establishes the requirements for the installation, sizing, and protection of feeder circuits — the conductors that...
Article 210 — Branch Circuits
Purpose
Article 210 of the National Electrical Code® (NEC®) defines the requirements for branch circuits — the final wiring that delivers power from panelboards to...
Article 200 — Grounded Conductors
Purpose
Article 200 of the National Electrical Code® (NEC®) defines the rules for identifying, connecting, and using grounded conductors — commonly known as neutral conductors.
These...
Article 110 – General Requirements for Electrical Installations
Purpose
Article 110 of the National Electrical Code® (NEC®) outlines the fundamental safety requirements for all electrical installations.
It ensures that equipment is installed, maintained, and...
Article 100 – Definitions
Purpose
Article 100 of the National Electrical Code® (NEC®) provides clear definitions for terms used throughout the Code.
Understanding these definitions is essential because NEC requirements...
Article 90 – Purpose, Scope, and Enforcement
Purpose
Article 90 of the National Electrical Code® (NEC®) defines why the Code exists — to ensure electrical systems are safe, reliable, and free from...
