What component divides an electrical power feed into subsidiary circuits while providing protection for each circuit?

The component that divides an electrical power feed into subsidiary circuits while also providing protection for each circuit is the panel board. A panel board is designed to distribute electrical power to various circuits within a facility, allowing for individual control and management of each circuit. It organizes the different electrical circuits and contains devices, such as circuit breakers, that protect the circuits from overloads and short circuits.

In practical use, when electrical power enters a building, it typically goes to a main service panel, where it is then divided into smaller circuits via the panel board. This setup not only facilitates the effective distribution of power but also enhances safety by isolating circuit faults.

The other options do not fulfill the same dual function of distribution and circuit protection. A feeder is responsible for transferring power from one location to another, such as from a transformer to a panel board, but it does not typically have the distribution and protection features. A raceway serves as a conduit for electrical wires but does not manage power distribution or provide circuit protection. A circuit breaker is a protective device that interrupts current in the event of an overload or short circuit but is housed within a panel board and does not independently divide power into subsidiary circuits. Thus, the panel board is essential for both dividing the electrical feed into