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The bus bars are another essential component within the panel board. These conductive bars serve as the main distribution point for electrical power, connecting the main breaker and individual circuit breakers to the incoming power supply. Bus bars are typically made of copper or aluminum due to their excellent conductivity and durability.
To enhance safety, electrical panel boards are equipped with grounding and bonding components. Grounding ensures a safe path for electrical currents to dissipate into the ground in the event of a fault, while bonding ensures that all metal components within the panel are electrically connected to prevent shocks and reduce the risk of fires.

Various other components contribute to the functionality of the parts of electrical panel board , including panel meters to monitor voltage, current, and power usage, as well as surge protectors to safeguard electronic equipment from voltage spikes. Additionally, there are often indicators, such as LED lights, to signal when a circuit breaker has tripped or if there is an issue with the electrical system.