What is a Distribution Board?
A Distribution Board (DB) is an electrical enclosure that receives the main power supply and distributes it into multiple outgoing circuits. It provides safe and organized power distribution with the help of protection devices like MCB, RCCB, RCBO, and isolators.
Working of Distribution Board
The incoming electrical supply enters the Distribution Board through the main switch or isolator. The power is then distributed through busbars to different protection devices, which control and protect individual outgoing circuits connected to electrical loads.
Incoming Supply → Main Switch → Protection Devices → Outgoing Circuits → Electrical Loads
Main Functions of Distribution Board
Power Distribution: A distribution board divides the incoming power supply into separate circuits for lighting, fans, sockets, air conditioners, and other electrical equipment.
Circuit Protection: It protects electrical wiring and appliances from overload, short circuit, and leakage current faults.
Safety & Control: It provides a central location to control, isolate, and manage different electrical circuits safely.
Main Components of Distribution Board
Enclosure: Provides mechanical protection and safe housing for all electrical components.
Main Isolator: Used to switch ON/OFF the complete power supply of the distribution system.
MCB: Protects individual circuits from overload and short circuit conditions.
RCCB/RCBO: Provides protection against electrical leakage and enhances user safety.
Busbar: Distributes phase and neutral supply to multiple outgoing circuits.
Neutral & Earth Link: Ensures proper current return path and safe grounding.
Applications of Distribution Board
Distribution Boards are widely used in residential buildings, commercial spaces, offices, industries, and electrical control systems for safe and efficient power management.
