Pronunciation: [sˈʌbpanə͡l] (IPA) 
The correct spelling of "subpanel" is /ˈsʌb.pæn.əl/. This word is composed of two parts: "sub-" meaning "below" or "under", and "panel" which refers to an electrical control board. Together, "subpanel" refers to a secondary electrical panel connected to a main panel. It is essential to maintain the correct spelling in technical writing to avoid confusion and ensure proper installation and maintenance of electrical systems.
A subpanel, also known as a subsidiary panel or subdistribution panel, is an electrical distribution board that is connected to and supplied by a main electrical panel. It serves as a secondary distribution point for electricity within a building or structure.
A subpanel is used when the main electrical panel does not have sufficient space for additional circuit breakers due to limited capacity or when there is a need to supply power to a specific area or equipment within a building. It comprises several individual circuit breakers, which control and protect specific electrical circuits.
Typically, a subpanel is connected to the main panel through a feeder cable, which carries electrical power from the main panel to the subpanel. The feeder cable is connected to a dedicated circuit breaker in the main panel and is then routed to the subpanel.
Subpanels are commonly found in larger residential buildings, commercial settings, and industrial facilities where there is a higher demand for electricity and multiple electrical circuits. They are often installed in areas where additional outlets, lighting, or heavy machinery are required, allowing for a more organized and efficient distribution of electrical power.
Overall, a subpanel functions as a supplementary electrical panel that distributes power to specific areas or equipment while being connected to the main panel for the supply of electricity.
The word "subpanel" is derived from the combination of two words: "sub" and "panel".
1. "Sub": This prefix comes from the Latin word "sub", which means "below" or "under". It is commonly used to indicate that something is subordinate, secondary, or of a lower rank or level.
2. "Panel": This word is derived from the Old French word "panell", which refers to a piece of cloth or a section of a painting. It later came to be used to describe a distinct section or portion of a larger whole. In the context of "subpanel", it refers to a smaller separate panel that functions as a part of a larger electrical control panel.
Combining these two components, "subpanel" refers to a subordinate or secondary panel that is part of a larger control panel or electrical distribution system.
