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...

Automatic Changeover Switch Connection

Automatic Changeover Switch Connection An Automatic Transfer Switch (ATS) switches power between the main...

Parts of an Oil-Filled Transformer

This diagram shows the internal and external parts of an oil-filled power transformer, an essential device used to step up or step down voltage...

Simple Audio Amplifier Circuit Using AN7523N IC

This diagram explains how to build a basic 12V audio amplifier circuit using the AN7523N IC. It’s ideal for powering small speakers (like a...

Automatic Water Level Controller Wiring Diagram

This wiring diagram demonstrates how to automate water tank filling using a water level controller and motor pump. The setup ensures the tank fills...

Solar Charge Controller Wiring and Connection Guide

This diagram clearly illustrates how to connect a solar panel system with a charge controller, battery, and inverter to manage both DC and AC...

Staircase Wiring Connection

This diagram shows a staircase wiring circuit, a smart setup that allows you to control a single light from two different switches — one...

Switchboard Wiring Connection

This diagram demonstrates a simple switchboard wiring connection, showing how to properly connect switches and sockets in one board for safe and efficient operation....

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