What is defined as "voltage drop" in electrical circuits?

Voltage drop refers to the reduction in voltage that occurs in an electrical circuit as electrical energy is transferred from the source (like a battery or transformer) to the load (such as a resistor, appliance, or motor). This phenomenon is primarily due to the resistance encountered by the electric current as it flows through the conductors and connections in the circuit.

Understanding this concept is crucial because excessive voltage drop can lead to inefficient operation of electrical devices, as they may not receive the voltage they require for optimal functioning. In practical terms, if the voltage at the load is significantly lower than at the source, it indicates a voltage drop that could affect performance and may require corrective measures, such as using thicker wires or shorter cable runs to minimize resistance.

This definition is significant for those working in electrical system installation and maintenance, as it directly impacts the design and integrity of electrical installations.