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...
Grounding & Bonding Separately Derived Systems (SDSs)
🔌 What is a Separately Derived System (SDS)?
An SDS is a system sourced from something other than a service where there is no direct...
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...
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...
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...
Ground an Electrical Panel: NEC Requirements
🏠 Ground an Electrical Panel: NEC Requirements
Proper grounding is the non-negotiable foundation of electrical safety. It ensures stability and provides a critical path for...
NEC Table 430.250: Full-Load Currents for Three-Phase Motors
This guide covers the application of NEC Table 430.250, which is used to determine the Full-Load Current (FLC) for three-phase alternating-current motors. This FLC...
Purpose of Grounding (Article 250 Overview)
NEC Article 250 is arguably the most important section of the Code for safety. Its primary goal is to protect people from electrical shock...
Equipment Grounding Conductors (EGC)
What is the EGC?
The Equipment Grounding Conductor (EGC) is the primary safety mechanism of the electrical system.
While the Grounding Electrode Conductor (GEC) connects the...
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...
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 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...
