Electrical services within the scope of the IRC are limited to a voltage of _____ and a maximum of _____ amperes for single-phase systems.

The question pertains to the electrical service specifications defined by the International Residential Code (IRC) for single-phase systems. The correct parameters for this specific type of electrical service are set at a voltage of 120/240 volts and a maximum of 200 amperes.

Understanding these thresholds is crucial, as they reflect the common residential electrical service levels that are adequate for typical household needs, including lighting, receptacles, and appliances. The specified voltage of 120/240 volts is standard for most residential buildings, providing the necessary electrical supply for various applications.

Additionally, the maximum amperage of 200 allows for sufficient power distribution within a home, accommodating modern electrical demands without overloading the circuits.

Other voltage and amperage ratings listed in the options may exceed residential needs or fall below safety standards stipulated by the IRC, demonstrating the importance of adhering to these established norms in home inspection practices.