Service Disconnect (or Main Switch)

Definition

A service disconnect, or main switch, is a switch for, or a means of, disconnecting an entire building from electrical service.

Purpose

The purpose of a service disconnect is to provide a single point of control to disconnect electrical power to the entire building, ensuring safety during maintenance, emergencies, or when the building is unoccupied.

Examples of Use

• Residential buildings have a main switch near the electrical panel to disconnect power during maintenance or emergencies.
• Commercial buildings use service disconnects to isolate power to different sections or the entire building for safety and maintenance.
• Industrial facilities rely on service disconnects to control power to large machinery and equipment safely.

Related Terms

• Circuit Breaker: A device that automatically interrupts the flow of electricity in a circuit when an overload or short circuit occurs.
• Electrical Panel: The central distribution point for electrical circuits in a building.
• Safety Switch: A device used to quickly disconnect electrical power for safety purposes.

Notes

Service disconnects must be easily accessible and clearly labeled to ensure quick and safe operation in case of emergencies or maintenance activities.