What is the typical function of a consumer unit?

• A. Stores energy for later use.
• B. Distributes power to circuits and houses protective devices MCBs RCDs RCBOs.
• C. Converts AC to DC for charging.
• D. Monitors humidity in a room.

Answer: (B)

The function being tested is that the consumer unit acts as the central distribution point for the electrical installation. It takes the incoming mains supply and distributes it to the building’s circuits, while housing protective devices such as MCBs, RCDs, and RCBOs that automatically disconnect circuits when faults or overloads occur. This combination provides both protection for the wiring and safety for people, and it may include a main switch for turning off the whole system. It does not store energy, convert AC to DC, or monitor environmental conditions like humidity, so the option describing distribution with protective devices is the correct one.