Low-Voltage Electrical Circuit Basics

Circuit Basics

Basic Concepts

1. Voltage, Current and Resistance

   • Ohm's Law application
   • Power calculation
   • Circuit parameter measurement

2. Circuit Composition

   • Power supply, load and conductors
   • Switches and protection devices
   • Grounding systems

Common Circuit Types

• Series circuits
• Parallel circuits
• Series-parallel circuits

Safe Electricity Usage Principles

1. Correctly identify live wires, neutral wires and ground wires
2. Understand the hazards of short circuits and overloads
3. Master the principle of leakage protection