Final answer:
A conductor is the unit in an electrical system designed to carry electrical energy without utilizing it, differentiating it from components like capacitors and transformers.
Step-by-step explanation:
The unit of an electrical system which is intended to carry but not utilize electrical energy is a conductor. A conductor is a material that allows the flow of electrical charge or current through it, and it is an essential component of electrical circuits. Unlike insulators, which do not allow a transfer of electricity, conductors facilitate current flow. On the other hand, a capacitor is an electrical component used to store energy by separating electric charge on two opposing plates, often with an insulator between them. This property of storing charge is known as capacitance. A transformer is another electrical device, but its role is to transform voltages from one value to another, not just carry electrical energy without utilizing it.