In a single-phase 208 VAC circuit, how many hot wires are typically present?

In a single-phase 208 VAC circuit, there are typically two hot wires present. This configuration stems from the fact that a 208 VAC supply is often derived from a three-phase system where two of the three phases are utilized to create the single-phase 208 volt circuit. By tapping into two of the three phases, you achieve the desired voltage of 208 volts, which is a common voltage found in commercial settings.

It's important to note that the presence of two hot wires allows for the effective use of both phase voltages to power appliances and equipment designed for this voltage level. Each hot wire carries an alternating current that is out of phase by 120 degrees, providing the necessary power for a variety of electrical applications. This two-wire configuration plays a crucial role in ensuring the balance and efficiency of the electrical system.

In contrast, the other available choices either overcount or misunderstand the wiring configuration in relation to a single-phase setup. A single wire configuration would not provide the necessary voltage; three wires would typically indicate a three-phase system rather than a single-phase circuit; and four wires would suggest the inclusion of a neutral, which is not defining the number of hot wires necessary in a typical 208 VAC single-phase circuit.