What does the term "line voltage" refer to?

The term "line voltage" refers specifically to the voltage level that powers appliances or devices. In typical electrical systems, line voltage indicates the standard voltage supplied by the utility to residences and businesses for general power use, which is commonly 120V or 240V in many regions. This voltage is essential for operating household appliances, HVAC systems, and other electrical devices that rely on this standard supply to function correctly.

Understanding this concept is crucial, especially in HVAC, where line voltage is often used to power equipment like compressors, fans, and pumps. These components require sufficient voltage to operate efficiently, making it important for technicians to ensure that proper line voltage is available and that it remains stable during operation.