What is typically included in the electrical distribution system?

The electrical distribution system is a critical component of electrical infrastructure, responsible for distributing electrical energy from the power source to various loads throughout a facility or structure. Each element listed plays a significant role in ensuring the system operates safely and effectively.

Circuit breakers are included in the system as they serve as protective devices, automatically interrupting the flow of electricity in the event of a fault or overload, thereby preventing damage to wiring and equipment. Fuse boxes, similar in function, contain fuses that also protect circuits by breaking the connection when current exceeds safe levels. Wiring harnesses facilitate the organized distribution of electrical power by grouping wires that deliver electricity to various components, helping to simplify connection management and protect against physical damage.

Since each of these components is integral to the function and safety of the electrical distribution system, the most comprehensive and accurate choice is to include all of the mentioned components as part of a complete system. Hence, the answer encompasses the reality that a well-rounded electrical distribution system incorporates various protective and facilitating elements, making the choice of all of the above correct.